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25 lines
622 B
C++
25 lines
622 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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int a[350];
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int main()
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{
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int n;
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while (cin >> n)
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{
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for (int i = 1; i <= n; i++)
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scanf("%d", a + i);
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for (int i = 2; i <= n; i++)
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a[i] += a[i - 1];
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int sum = a[n];
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int cnt = 0;
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for (int i = 0; i < n; i++)
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for (int j = 0; j < i; j++)
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if (2 * (a[i] - a[j]) == sum)
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cnt++;
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cout << (1ll * cnt * (cnt - 1) / 2) << endl;
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}
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return 0;
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}
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