Submission #3019704

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<queue>
using namespace std;

int n,m,ans=0,tmp[200005];
struct Student{
	int l,r;
	bool operator<(const Student &b)const{
		return l!=b.l?l<b.l:r>b.r;
	}
}s[200005];
priority_queue<int,vector<int>,greater<int> > q;

int main(){
//	freopen("data.in","r",stdin);
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++)
		scanf("%d%d",&s[i].l,&s[i].r);
	sort(s+1,s+n+1);
	int h=1,t=m;
	for(int i=1;i<=n;i++){
		q.push(s[i].r);
		if(h<=t&&h<=s[i].l)h++;
		else{
			tmp[++tmp[0]]=q.top();
			q.pop();
		}
	}
	sort(tmp+1,tmp+tmp[0]+1);
	for(int i=tmp[0];i>=1;i--){
		if(h<=t&&tmp[i]<=t)t--;
		else ans++;
	}
	printf("%d",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:18:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:20:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&s[i].l,&s[i].r);
                                ^

Judge Result