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21 lines
436 B
21 lines
436 B
#include <bits/stdc++.h>
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using namespace std;
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int a[1010];
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int main() {
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int n;
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int cnt = 0;
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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}
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for (int i = 1; i <= n; i++) {
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for (int j = i + 1; j <= n; j++) {
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int x;
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x = a[i] + a[j];
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if (sqrt(x) * sqrt(x) == x)
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cnt += 1;
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}
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}
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cout << cnt;
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return 0;
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} |