diff --git a/.vscode/acm98.code-snippets b/.vscode/acm98.code-snippets
new file mode 100644
index 0000000..6b01cb0
--- /dev/null
+++ b/.vscode/acm98.code-snippets
@@ -0,0 +1,86 @@
+{
+	// Place your acm 工作区 snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and 
+	// description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope 
+	// is left empty or omitted, the snippet gets applied to all languages. The prefix is what is 
+	// used to trigger the snippet and the body will be expanded and inserted. Possible variables are: 
+	// $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. 
+	// Placeholders with the same ids are connected.
+	// Example:
+	// "Print to console": {
+	// 	"scope": "javascript,typescript",
+	// 	"prefix": "log",
+	// 	"body": [
+	// 		"console.log('$1');",
+	// 		"$2"
+	// 	],
+	// 	"description": "Log output to console"
+	// }
+	"ICPC Starndard Header C++98": {
+		"scope": "c,cpp",
+		"prefix": "acm98",
+		"body": [
+			"#define _CRT_SECURE_NO_WARNINGS",
+			"#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING",
+			"#include <bits/stdc++.h>",
+			"using namespace std;",
+			"#define CRP(t, x) const t &x",
+			"#define OPX(op, t, x) operator op(CRP(t, x))",
+			"#define OPL(t, x) bool OPX(<, t, x) const",
+			"#define FIL(x, v) memset(x, v, sizeof(x))",
+			"#define CLR(x) FIL(x, 0)",
+			"#define NE1(x) FIL(x, -1)",
+			"#define INF(x) FIL(x, 0x3f)",
+			"#ifndef _DEBUG",
+			"#define _DEBUG 0",
+			"#endif // !_DEBUG",
+			"#define IFD if (_DEBUG)",
+			"typedef int64_t ll, i64;",
+			"typedef uint64_t ull, u64;",
+			"inline char getchar(int)",
+			"{",
+			"    static char buf[64 << 20], *S = buf, *T = buf;",
+			"    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + buf;",
+			"    return S == T ? EOF : *S++;",
+			"}",
+			"template <typename T>",
+			"inline bool read(T &x)",
+			"{",
+			"    int ch = x = 0, f = 1;",
+			"    while (!isdigit(ch = getchar()))",
+			"        if (ch == EOF)",
+			"            return false;",
+			"        else if (ch == '-')",
+			"            f = 0;",
+			"    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';",
+			"    return x = f ? x : -x, true;",
+			"}",
+			"template <typename T1, typename T2>",
+			"inline bool read(T1 &v1, T2 &v2) { return read(v1) && read(v2); }",
+			"template <typename T1, typename T2, typename T3>",
+			"inline bool read(T1 &v1, T2 &v2, T3 &v3) { return read(v1) && read(v2) && read(v3); }",
+			"template <typename T1, typename T2, typename T3, typename T4>",
+			"inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4) { return read(v1) && read(v2) && read(v3) && read(v4); }",
+			"template <typename T1, typename T2, typename T3, typename T4, typename T5>",
+			"inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5) { return read(v1) && read(v2) && read(v3) && read(v4) && read(v5); }",
+			"inline ll gcd(ll a, ll b)",
+			"{",
+			"    for (; b; swap(a, b)) a %= b;",
+			"    return a;",
+			"}",
+			"inline ll fpow(ll a, ll b, ll m)",
+			"{",
+			"    ll r = 1;",
+			"    for (; b; b >>= 1, a = a * a % m)",
+			"        if (b & 1) r = r * a % m;",
+			"    return r;",
+			"}",
+			"const double eps = 1e-8;",
+			"inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }",
+			"int main()",
+			"{",
+			"    $0",
+			"    return 0;",
+			"}",
+		]
+	}
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index d920205..4746104 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -7,6 +7,12 @@
     },
     "cmake.configureOnOpen": false,
     "files.associations": {
-        "functional": "cpp"
+        "functional": "cpp",
+        "chrono": "cpp",
+        "type_traits": "cpp",
+        "csetjmp": "cpp",
+        "cfloat": "cpp",
+        "ciso646": "cpp",
+        "iosfwd": "cpp"
     }
 }
\ No newline at end of file
diff --git a/Article6/Water/poj1000.cpp b/Article6/Water/poj1000.cpp
new file mode 100644
index 0000000..58d16d1
--- /dev/null
+++ b/Article6/Water/poj1000.cpp
@@ -0,0 +1,118 @@
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#ifdef ONLINE_JUDGE
+#include <algorithm>
+#include <bitset>
+#include <cctype>
+#include <cerrno>
+#include <cfloat>
+#include <ciso646>
+#include <climits>
+#include <clocale>
+#include <cmath>
+#include <complex>
+#include <csetjmp>
+#include <csignal>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <cwchar>
+#include <cwctype>
+#include <deque>
+#include <exception>
+#include <fstream>
+#include <functional>
+#include <iomanip>
+#include <ios>
+#include <iosfwd>
+#include <iostream>
+#include <istream>
+#include <iterator>
+#include <limits>
+#include <list>
+#include <locale>
+#include <map>
+#include <memory>
+#include <new>
+#include <numeric>
+#include <ostream>
+#include <queue>
+#include <set>
+#include <sstream>
+#include <stack>
+#include <stdexcept>
+#include <streambuf>
+#include <string>
+#include <typeinfo>
+#include <utility>
+#include <valarray>
+#include <vector>
+typedef long long int64_t;
+typedef unsigned long long uint64_t;
+#else
+#include <bits/stdc++.h>
+#endif
+using namespace std;
+#define CRP(t, x) const t &x
+#define OPX(op, t, x) operator op(CRP(t, x))
+#define OPL(t, x) bool OPX(<, t, x) const
+#define FIL(x, v) memset(x, v, sizeof(x))
+#define CLR(x) FIL(x, 0)
+#define NE1(x) FIL(x, -1)
+#define INF(x) FIL(x, 0x3f)
+#ifndef _DEBUG
+#define _DEBUG 0
+#endif // !_DEBUG
+#define IFD if (_DEBUG)
+typedef int64_t ll, i64;
+typedef uint64_t ull, u64;
+inline char getchar(int)
+{
+    static char buf[64 << 20], *S = buf, *T = buf;
+    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + buf;
+    return S == T ? EOF : *S++;
+}
+template <typename T>
+inline bool read(T &x)
+{
+    int ch = x = 0, f = 1;
+    while (!isdigit(ch = getchar()))
+        if (ch == EOF)
+            return false;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T1, typename T2>
+inline bool read(T1 &v1, T2 &v2) { return read(v1) && read(v2); }
+template <typename T1, typename T2, typename T3>
+inline bool read(T1 &v1, T2 &v2, T3 &v3) { return read(v1) && read(v2) && read(v3); }
+template <typename T1, typename T2, typename T3, typename T4>
+inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4) { return read(v1) && read(v2) && read(v3) && read(v4); }
+template <typename T1, typename T2, typename T3, typename T4, typename T5>
+inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5) { return read(v1) && read(v2) && read(v3) && read(v4) && read(v5); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline ll fpow(ll a, ll b, ll m)
+{
+    ll r = 1;
+    for (; b; b >>= 1, a = a * a % m)
+        if (b & 1) r = r * a % m;
+    return r;
+}
+const double eps = 1e-8;
+inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
+int main()
+{
+    int a, b;
+    read(a, b);
+    printf("%d", a + b);
+    return 0;
+}
\ No newline at end of file
diff --git a/Codeforces/1253D.cpp b/Codeforces/1253D.cpp
new file mode 100644
index 0000000..2901206
--- /dev/null
+++ b/Codeforces/1253D.cpp
@@ -0,0 +1,97 @@
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+#define CRP(t, x) const t &x
+#define OPX(op, t, x) operator op(CRP(t, x))
+#define OPL(t, x) bool OPX(<, t, x) const
+#define FIL(x, v) memset(x, v, sizeof(x))
+#define CLR(x) FIL(x, 0)
+#define NE1(x) FIL(x, -1)
+#define INF(x) FIL(x, 0x3f)
+#ifndef _DEBUG
+#define _DEBUG 0
+#endif // !_DEBUG
+#define IFD if (_DEBUG)
+typedef int64_t ll, i64;
+typedef uint64_t ull, u64;
+template <typename... Types>
+using comtype = typename common_type<Types...>::type;
+template <typename T>
+using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
+template <typename T>
+using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
+inline char getchar(int)
+{
+    static char buf[64 << 20], *S = buf, *T = buf;
+    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + buf;
+    return S == T ? EOF : *S++;
+}
+template <typename T, typename = enable_if_integral<T>>
+inline bool read(T &x)
+{
+    int ch = x = 0, f = 1;
+    while (!isdigit(ch = getchar()))
+        if (ch == EOF)
+            return false;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T, typename... Args, typename = enable_if_integral<T>>
+inline bool read(T &x, Args &... args) { return read(x) && read(args...); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmin(CRP(T1, v1), CRP(T2, v2)) { return min<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmin(CRP(T, v), const Args &... args) { return min<TResult>(v, mmin(args...)); }
+template <typename T1, typename T2, typename TResult = comtype<T1, T2>>
+inline TResult mmax(CRP(T1, v1), CRP(T2, v2)) { return max<TResult>(v1, v2); }
+template <typename T, typename... Args, typename TResult = comtype<T, Args...>>
+inline TResult mmax(CRP(T, v), const Args &... args) { return max<TResult>(v, mmax(args...)); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline ll fpow(ll a, ll b, ll m)
+{
+    ll r = 1;
+    for (; b; b >>= 1, a = a * a % m)
+        if (b & 1) r = r * a % m;
+    return r;
+}
+constexpr double eps = 1e-8;
+inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
+const int N = 4e5 + 55;
+int fa[N];
+int find(int x) { return x == fa[x] ? x : fa[x] = find(fa[x]); }
+int main()
+{
+    int n, m;
+    read(n, m);
+    for (int i = 0; i <= n; i++) fa[i] = i;
+    for (int i = 0, x, y; i < m; i++) read(x, y), fa[find(x)] = find(y);
+    int grps = 0;
+    for (int i = 1; i <= n; i++) grps = max(grps, find(i));
+    vector<vector<int>> v(grps + 1);
+    for (int i = 1; i <= n; i++) v[find(i)].push_back(i);
+    int ans = 0;
+    set<int> S;
+    for (int i = 1; i <= n; i++) S.insert(i);
+    while (!S.empty())
+    {
+        int curmin = *S.begin();
+        int ty = find(curmin);
+        int curmax = *v[ty].rbegin();
+        for (int i = curmin + 1; i < curmax; i++)
+        {
+            if (find(i) != ty)
+                ans++, curmax = max(curmax, *v[find(i)].rbegin()), fa[find(i)] = ty;
+            S.erase(i);
+        }
+        S.erase(curmin), S.erase(curmax);
+    }
+    printf("%d", ans);
+    return 0;
+}
\ No newline at end of file
diff --git a/tmpl98.cpp b/tmpl98.cpp
new file mode 100644
index 0000000..32fbc0d
--- /dev/null
+++ b/tmpl98.cpp
@@ -0,0 +1,62 @@
+#define _CRT_SECURE_NO_WARNINGS
+#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
+#include <bits/stdc++.h>
+using namespace std;
+#define CRP(t, x) const t &x
+#define OPX(op, t, x) operator op(CRP(t, x))
+#define OPL(t, x) bool OPX(<, t, x) const
+#define FIL(x, v) memset(x, v, sizeof(x))
+#define CLR(x) FIL(x, 0)
+#define NE1(x) FIL(x, -1)
+#define INF(x) FIL(x, 0x3f)
+#ifndef _DEBUG
+#define _DEBUG 0
+#endif // !_DEBUG
+#define IFD if (_DEBUG)
+typedef int64_t ll, i64;
+typedef uint64_t ull, u64;
+inline char getchar(int)
+{
+    static char buf[64 << 20], *S = buf, *T = buf;
+    if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + buf;
+    return S == T ? EOF : *S++;
+}
+template <typename T>
+inline bool read(T &x)
+{
+    int ch = x = 0, f = 1;
+    while (!isdigit(ch = getchar()))
+        if (ch == EOF)
+            return false;
+        else if (ch == '-')
+            f = 0;
+    for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
+    return x = f ? x : -x, true;
+}
+template <typename T1, typename T2>
+inline bool read(T1 &v1, T2 &v2) { return read(v1) && read(v2); }
+template <typename T1, typename T2, typename T3>
+inline bool read(T1 &v1, T2 &v2, T3 &v3) { return read(v1) && read(v2) && read(v3); }
+template <typename T1, typename T2, typename T3, typename T4>
+inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4) { return read(v1) && read(v2) && read(v3) && read(v4); }
+template <typename T1, typename T2, typename T3, typename T4, typename T5>
+inline bool read(T1 &v1, T2 &v2, T3 &v3, T4 &v4, T5 &v5) { return read(v1) && read(v2) && read(v3) && read(v4) && read(v5); }
+inline ll gcd(ll a, ll b)
+{
+    for (; b; swap(a, b)) a %= b;
+    return a;
+}
+inline ll fpow(ll a, ll b, ll m)
+{
+    ll r = 1;
+    for (; b; b >>= 1, a = a * a % m)
+        if (b & 1) r = r * a % m;
+    return r;
+}
+const double eps = 1e-8;
+inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
+int main()
+{
+    $0
+    return 0;
+}
\ No newline at end of file