31 lines
456 B
C++
31 lines
456 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int m, n, k;
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int check(int _x) {
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int mn = _x * 2;
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int nn = _x;
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if (mn < 0 || nn < 0 || m - mn + n - nn < k) {
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return 0;
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}
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return 1;
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}
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int main() {
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cin >> m >> n >> k;
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int l = 0, r = min(m / 2, n);
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int res = 0;
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while (l < r) {
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int mid = (l + r) / 2;
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if (check(mid)) {
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res = max(res, mid);
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l = mid + 1;
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} else {
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r = mid;
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}
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}
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cout << res << '\n';
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}
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