제출 #1057160

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1057160		vjudge1	Exhibition (JOI19_ho_t2)	C++17	100 / 100	44 ms	4696 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using pii = pair<int, int>;
const int MAXN = 1e5 + 5;
int N, M;
pii a[MAXN];
int b[MAXN];
signed main() {
#define TASK "code"
 
    if (fopen(TASK ".inp", "r")) {
        freopen(TASK ".inp", "r", stdin);
        freopen(TASK ".out", "w", stdout);
    }
 
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> N >> M;
    for(int i = 1; i <= N; i++) cin >> a[i].first >> a[i].second;
    for(int i = 1; i <= M; i++) cin >> b[i];
    sort(a + 1, a + N + 1, [&](const pii a, const pii b) {
        if(a.second != b.second) return a.second < b.second;
        return a.first < b.first;
    });
    sort(b + 1, b + M + 1);
    int j = N;
    int ans = 0;
    for(int i = M; i >= 1; i--) {
        while(j >= 1 and a[j].first > b[i])
            j--;
        if(j > 0 and a[j].first <= b[i]) {
            j--;
            ans++;
        }
    }
    cout << ans;
    return (0 ^ 0);
}

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         freopen(TASK ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         freopen(TASK ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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