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16 lines
506 B
C++
16 lines
506 B
C++
#include <cstdio>
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int len[25], ans;
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int main()
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{
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int n;
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scanf("%d", &n);
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for (int i = 1; i <= n; i++) scanf("%d", &len[i]), len[i] += len[i - 1];
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for (int i = 0 + 1; i <= n; i++)
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for (int j = i + 1; j <= n; j++)
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for (int k = j + 1; k <= n; k++)
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for (int l = k + 1; l <= n; l++)
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if (len[j] - len[i] == len[l] - len[k] && len[n] - len[l] + len[i] == len[k] - len[j])
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ans++;
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printf("%d", ans);
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return 0;
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} |