Submission

Score: 0

User: Quinruj

Problemset: ห้องสมุดเมือง 3M

Language: cpp

Time: 0.002 second

Submitted On: 2025-11-19 21:28:28

#include <bits/stdc++.h>
#define ll long long
#define pii pair<ll,ll>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll n, k = 0;cin>>n;
    set<int> v;
    for (int i = 0;i<n;i++){
        ll l,r;cin>>l>>r;
        for (int j = l;j<r;j++) {
            v.insert(j);
            k++;
        }
    }
    cout << *v.begin()+(k/2-1);
}