Submission #2211293

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Source Code Expand

#include<stdio.h>
#include<string>
#include<iostream>
#include<math.h>
#include<vector>
#include<set>
#include<algorithm>
#include<list>
using namespace std;

int main() {
	int N, K;
	cin >> N >> K;
	vector<int>a, b;
	for (int i = 0;i < N;i++)cin >> a[i] >> b[i];
	vector<int>s;
	for (int i = 0;i < N;i++) {
		for (int j = 0;j < b[i];j++) {
			s.push_back(a[i]);
		}
	}
	sort(s.begin(), s.end());
	cout << s[K-1] << endl;
	return 0;
}

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