Submission

[PPPPP][PPPPP][PPPPPPPPPP]

Score: 100

User: Nagornz

Problemset: ห้องสมุดเมือง 3M

Language: cpp

Time: 0.002 second

Submitted On: 2025-03-13 20:38:28

#include <bits/stdc++.h>
#define int long long
#define double long double
#define pii pair <int,int>
#define tiii tuple <int, int, int>
#define f first
#define s second
#define all(x) x.begin(), x.end()
#define ub(a, b) upper_bound(a.begin(), a.end(), b) - a.begin();
#define lb(a, b) lower_bound(a.begin(), a.end(), b) - a.begin();
#define ve vector
#define graph(a, n) vector <int> a[n];
#define wgraph(a, n) vector <pii> a[n];
#define emb emplace_back
#define em emplace
#define ins insert
#define er erase
#define iShowSpeed cin.tie(NULL)->sync_with_stdio(false)

using namespace std;

template <typename T>
using greater_priority_queue = priority_queue<T, vector<T>, greater<T>>;

const int mod = 1e9 + 7;
const int inf = 1e18;

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

int32_t main(){
    iShowSpeed;
    int n; cin >> n;
    map <int, int> mp;
    int sum = 0;
    for (int i = 0; i < n; i++) {
        int x, y; cin >> x >> y;
        mp[x]++;
        mp[y]--;
        sum += y - x;
    }
    int idx = sum / 2 == 0 ? 1 : sum / 2;
    int cnt = 0;
    int curr = 0, prev = 0;
    for (auto [x, add] : mp) {
        if (cnt + curr * (x - prev) >= idx && curr) {
            int wow = idx - cnt;
            wow = (wow + curr - 1) / curr;
            cout << prev + wow - 1 << "\n";
            return 0;
        }
        cnt += curr * (x - prev);
        curr += add;
        prev = x;
    }
}