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- #include <iostream>
- 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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