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using namespace std; int main(){ int n; cin >> n; int a[n]; for(int i = 0; i < n; i++) { cin >> a[i]; } long long result = 0; for(int i = 0; i < n; i++) { for(int j = i; j < n; j++) { for(int k = i; k <= j; k++) { if(a[k] == 0) { result += 1; break; } } } } cout << result << endl; return 0; }
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