제출 #320299

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
320299		kaplanbar	무제 (POI11_tem)	C++14	0 / 100	265 ms	4724 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> v;
    for(int i = 0; i < n; i++) {
        int x, y;
        cin >> x >> y;
        if(v.empty()) {
            v.push_back(x);
        }
        else {
            auto it = upper_bound(v.begin(), v.end(), y) - v.begin();
            if(it == 0) {
                v[it] = x;
            }
            else {
                int now = max(v[it - 1], x);
                if(it == (int)v.size()) v.push_back(now);
                else if(now < v[it]) v[it] = now;
            }
        }
    }
    cout << v.size();
    return 0;
}

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