Submission

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Score: 0

User: Nathlol2

Problemset: ห้องสมุดเมือง 3M

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-10 12:38:58

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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    
    int n;
    cin >> n;
    vector<pair<int, int>> v;
    for(int i = 0;i<n;i++){
        int a, b;
        cin >> a >> b;
        v.push_back({a, b});
    }
    sort(v.begin(), v.end());
    int l = 0;
    vector<int> pos(n + 1);
    pos[0] = 0;
    for(int i = 0;i<n;i++){
        auto [a, b] = v[i];
        l += (b - a);
        pos[i + 1] = l;
    }
    int c = l / 2;
    for(int i = 1;i<=n;i++){
        if(c < pos[i]){
            //v[i - 1]
            int curpos = pos[i - 1];
            for(int j = v[i - 1].first;j<v[i - 1].second;j++){
                if(curpos == c){
                    cout << j - 1 << '\n';
                    return 0;
                }
                curpos++;

            }
        }
    }
}