제출 #844634

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
844634		AlphaMale06	Exhibition (JOI19_ho_t2)	C++17	0 / 100	0 ms	348 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define mp make_pair
#define F first
#define S second
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    pair<int, int> a[n];
    int b[m];
    for(int i=0; i< n; i++){
        int x, y;
        cin >> x >> y;
        a[i]=mp(x, y);
    }
    for(int i=0; i< m; i++){
        cin >> b[i];
    }
    sort(b, b+m);
    sort(a, a+n);
    int l=0;
    int r=m;
    while(l<=r){
        int s=(l+r)/2;
        int frst=m-s;
        multiset<int> st;
        int w=b[frst];
        int ind;
        for(int i=0; i< n; i++){
            if(a[i].F<=w){
                st.insert(a[i].S);
            }
            else {
                ind=i;
                break;
            }
        }
        int cur;
        if(st.empty()){
            r=s-1;
            continue;
        }
        else{
            cur=*st.begin();
            st.erase(st.find(cur));
        }
        bool ok =true;
        for(int i=frst+1; i< m; i++){
            w=b[i];
            for(int j=ind; j<n; j++){
                if(a[j].F<=w){
                    st.insert(a[j].S);
                }
                else{
                    ind=j;
                    break;
                }
            }
            if(st.empty()){
                ok=false;
                continue;
            }
            else{
                if(*st.rbegin()<cur){
                    ok=false;
                    continue;
                }
                else{
                    auto ptr=st.lower_bound(cur);
                    st.erase(ptr);
                }
            }
        }
        if(ok){
            l=s+1;
        }
        else{
            r=s-1;
        }
    }
    cout << max(0,l-1) << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:32:13: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
   32 |         int ind;
      |             ^~~

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