Submission

Score: 100

User: august

Problemset: ห้องสมุดเมือง 3M

Language: cpp

Time: 0.044 second

Submitted On: 2026-03-11 11:40:11

#include <bits/stdc++.h>
using namespace std;

const int mx = 2e7+1;
int sw[mx];

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin>> n;

    int sm = 0, f;
    for (int i=0; i<n; i++) {
        int x,y;
        cin>> x>> y;
        f=x;
        sw[x]++;
        sw[y]--;
        sm+=y-x;
    }

    if (sm==1) {
        cout<< f;
        return 0;
    }
    int cur=0, cnt=0;
    for (int i=0; i<mx; i++) {
        cur+=sw[i];
        cnt+=cur;
        if (cnt >= sm/2) {
            cout<< i;
            return 0;
        }
    }
}