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56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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#define CRP(t, x) const t &x
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#define OPX(op, t, x) operator op(CRP(t, x))
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#define OPL(t, x) bool OPX(<, t, x) const
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#define FIL(x, v) memset(x, v, sizeof(x))
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#define CLR(x) FIL(x, 0)
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#define NE1(x) FIL(x, -1)
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#define INF(x) FIL(x, 0x3f)
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#ifndef _DEBUG
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#define _DEBUG 0
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#endif // !_DEBUG
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#define IFD if (_DEBUG)
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typedef int64_t ll, i64;
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typedef uint64_t ull, u64;
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template <typename T>
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using enable_if_arithmetic = typename enable_if<is_arithmetic<T>::value>::type;
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template <typename T>
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using enable_if_integral = typename enable_if<is_integral<T>::value>::type;
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inline char getchar(int)
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{
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static char buf[64 << 20], *S = buf, *T = buf;
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if (S == T) T = fread(S = buf, 1, 64 << 20, stdin) + S;
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return S == T ? EOF : *S++;
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}
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template <typename T, typename = enable_if_integral<T>>
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inline void read(T &x)
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{
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int ch = x = 0, f = 1;
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while (!isdigit(ch = getchar()))
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if (ch == '-') f = -1;
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for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
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x *= f;
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}
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template <typename T, typename... Args, typename = enable_if_integral<T>>
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inline void read(T &x, Args &... args) { read(x), read(args...); }
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ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
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ll fpow(ll a, ll b, ll m)
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{
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ll r = 1;
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for (; b; b >>= 1, a = a * a % m)
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if (b & 1) r = r * a % m;
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return r;
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}
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constexpr double eps = 1e-8;
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inline int sgn(double x) { return x > eps ? 1 : x < -eps ? -1 : 0; }
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int main()
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{
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string s;
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cin >> s;
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u64 zc = count(s.begin(), s.end(), '0');
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cout << (min(zc, s.size() - zc) << 1);
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return 0;
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} |