Submission #7929571

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Source Code Expand

#include<cstdio>
const int N=300020;
int n,m,i,l[N],r[N],c[N],s[N],Ans;
void init(){
	scanf("%d%d",&n,&m);
	for(i=1;i<=m;i++){
		scanf("%d%d",l+i,r+i);
		c[l[i]]++;
		c[r[i]+1]--;
	}
	for(i=1;i<=n;i++){
		c[i]+=c[i-1];
		s[i]=s[i-1]+(c[i]==1);
		//printf("%d ",c[i]);
	}
	for(i=1;i<=m;i++)
		if(!(s[r[i]]-s[l[i]-1]))
			Ans++;
	printf("%d\n",Ans);
	for(i=1;i<=m;i++)
		if(!(s[r[i]]-s[l[i]-1]))
			printf("%d\n",i);
}
int main(){
	init();
	//while(1);
	//work();
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘void init()’:
./Main.cpp:5:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:7:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",l+i,r+i);
                        ^

Judge Result