Submission #3455882

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Source Code Expand

#include<iostream>
#include<cstdio>
using namespace std;
int a[300010],b[100010],n,m,s;
bool vis[100010];
int main(){
    int x,y;
    scanf("%d%d",&n,&m);
	for(int i=1;i<=m;i++){
		scanf("%d%d",&x,&y);
		for(int j=x;j<=y;j++) a[j]++;
		for(int j=x;j<=y;j++) b[j]=i;
	}
	for(int i=1;i<=n;i++)
	if(a[i]==1) vis[b[i]]=1;
	for(int i=1;i<=m;i++)
	if(!vis[i]) s++;
	if(s) cout<<s<<endl;
	for(int i=1;i<=m;i++)
	if(!vis[i]) cout<<i<<endl;
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
                        ^
./Main.cpp:10:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&x,&y);
                      ^

Judge Result