Submission #199768

#	Time	Username	Problem	Language	Result	Execution time	Memory
199768		Mercenary	Exhibition (JOI19_ho_t2)	C++14	100 / 100	77 ms	4608 KiB

joi2019_ho_t2

#include<bits/stdc++.h>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
const int maxn = 1e5 + 5;
ii a[maxn];
int b[maxn];
int n  , m;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n >> m;
    for(int i = 1 ; i <= n ; ++i)cin >> a[i].second >> a[i].first;
    for(int i = 1 ; i <= m ; ++i)cin >> b[i];
    sort(a + 1 , a + n + 1,greater<ii>());
    sort(b + 1 , b + m + 1,greater<int>());
    int j = 1;
    int res = 0;
    for(int i = 1 ; i <= m ; ++i){
        while(j <= n && a[j].second > b[i])++j;
        if(j > n)break;
        ++j;
        res++;
    }
    cout << res;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:22:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:23:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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