29 lines
580 B
C++
29 lines
580 B
C++
#include<bits/stdc++.h>//万能头文件
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using namespace std;
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//注意大数组在放到main函数外边
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int const maxN = 2000001;
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int arr[maxN] = {0};
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int main() {
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int n=0;
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cin >> n;
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double a;
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int t;
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for (int i = 1; i <= n; i++) {
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cin >> a >> t;
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for (int k = 1; k <= t; k++) {
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int c = floor(a * k);
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arr[c] = abs(arr[c] - 1);
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}
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}
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for (int i = 1; i <= maxN; i++) {
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if (arr[i] == 1) {
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cout << i << endl;
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break;
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}
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}
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return 0;
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} |