Submission #1234528

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234528		Bui_Quoc_Cuong	Exhibition (JOI19_ho_t2)	C++20	100 / 100	52 ms	1748 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define ll long long
#define FOR(i, a, b) for(int i = a; i <= (int)b; i++)
#define FORD(i, a, b) for(int i = a; i >= (int)b; i--)
#define ALL(A) A.begin(), A.end()   
using namespace std;
const int maxn = 100005;
int n, m;
pair <int, int> a[maxn];
int c[maxn];
int main(){
    cin.tie(nullptr) -> sync_with_stdio(false);
    #define taskname "kieuoanh"
    if(fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin); freopen(taskname".out", "w", stdout);
    }
    cin >> n >> m;
    FOR(i, 1, n) cin >> a[i].second >> a[i].first;
    FOR(i, 1, m) cin >> c[i];
    sort(a + 1, a + 1 + n);
    sort(c + 1, c + 1 + m, greater <int>());
    int res = 1;
    FORD(i, n, 1) if(res <= m && a[i].second <= c[res]) res++;
    cout << res - 1;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:15:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(taskname".inp", "r", stdin); freopen(taskname".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:15:53: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         freopen(taskname".inp", "r", stdin); freopen(taskname".out", "w", stdout);
      |                                              ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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