Submission #129377

#	Time	Username	Problem	Language	Result	Execution time	Memory
129377		hungcung	Exhibition (JOI19_ho_t2)	C++17	0 / 100	2 ms	380 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
#define int long long
#define fi first
#define se second
using namespace std;
int n,m,c[100005],dem,ans;
pair<int,int> a[100005];
bool cmp(pair<int,int> &x,pair<int,int> &y){
	return x.se<y.se;
}
signed main(){
	scanf("%lld %lld",&n,&m);
	for(int i=0;i<n;i++){
		scanf("%lld %lld",&a[i].fi,&a[i].se);
	}
	for(int i=0;i<m;i++){
		scanf("%lld",&c[i]);
	}
	sort(a,a+n,cmp);
	sort(c,c+m);
	dem=n-1;
	for(int i=m-1;i>=0;i--){
		while(dem>=0&&a[dem].fi>c[i]){
			--dem;
		}
		if(dem>=0){
			++ans;
			--dem;
		}
	}
	printf("%lld",ans);
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld %lld",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:14:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld %lld",&a[i].fi,&a[i].se);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:17:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&c[i]);
   ~~~~~^~~~~~~~~~~~~~

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