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31 lines
955 B
C++
31 lines
955 B
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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const int N = 1e5 + 50;
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typedef long long ll;
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int a[N], b[N];
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deque<int> qa, qb;
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int main()
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{
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for (int n; ~scanf("%d", &n);)
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{
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int ans = 0;
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qa.clear(), qb.clear();
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for (int i = 0; i < n; i++) scanf("%d", a + i);
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for (int i = 0; i < n; i++) scanf("%d", b + i);
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for (int i = 0; i < n; i++)
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{
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while (!qa.empty() && a[qa.back()] < a[i]) qa.pop_back();
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while (!qb.empty() && a[qb.back()] < b[i]) qb.pop_back();
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if (qa.empty() && qb.empty())
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qa.push_back(i), qb.push_back(i), ans = i + 1;
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else if (!qa.empty() && !qb.empty() && qa.back() == qb.back())
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ans = i + 1;
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else
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break;
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}
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printf("%d\n", ans);
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}
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return 0;
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} |