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- int n;
- cin >> n;
- vi a(n);
- for(int i = 0; i < n; i++) {
- cin >> a[i];
- }
- vi b;
- for(int i = 0; i < n; i++) {
- for(int j = 0; j < i; j++) {
- b.pb(a[i] + a[j]);
- }
- }
- sort(all(b));
- for(int i = 0; i < n; i++) {
- int c = a[i];
- int pos = lower_bound(all(b), c) - b.begin();
- if(pos == (int)b.size() || b[pos] != c) {
- cout << "0\n";
- }
- else {
- int r = upper_bound(all(b), c) - b.begin();
- cout << r - pos << '\n';
- }
- }
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