제출 #234094

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
234094		super_j6	Exhibition (JOI19_ho_t2)	C++14	0 / 100	5 ms	384 KiB

joi2019_ho_t2

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second

const int maxn = 100000;
int n, m;
pi a[maxn];
int b[maxn], p[maxn];
vector<pi> v;

bool works(int x){
    for(int i = v[x].s, j = m - 1; ~i; i = p[i], j--){
        if(b[j] < a[i].s) return 0;
    }
    return 1;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);

    cin >> n >> m;
    
    for(int i = 0; i < n; i++) cin >> a[i].s >> a[i].f;
    for(int i = 0; i < m; i++) cin >> b[i];
    
    sort(a, a + n);
    sort(b, b + m);
    
    for(int i = 0; i < n; i++){
        int it = lower_bound(v.begin(), v.end(), (pi){a[i].s, n}) - v.begin();
        if(it < v.size()) v[it] = {a[i].s, i};
        else v.push_back({a[i].s, i});
        p[i] = it ? v[it - 1].s : -1;
    }
    
    int l = -1, r = min(m, (int)v.size());
    while(r - l > 1){
        int mid = (l + r) / 2;
        if(works(mid)) l = mid;
        else r = mid;
    }
    
    cout << (l + 1) << endl;

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:39:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(it < v.size()) v[it] = {a[i].s, i};
            ~~~^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50