Submission #6071705

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
const int Maxn=105; 
int n,k,cnt;
struct edg
{
	int x,y;
}edge[Maxn*Maxn];
int main()
{
	scanf("%d%d",&n,&k);
	int ans=(n-2)*(n-1)/2;
	if(ans<k)
	{
		printf("-1");
		return 0;
	}
	for(int i=2;i<=n;i++)
		edge[++cnt]=(edg){1,i};
	k-=ans;
	for(int i=2;i<=n;i++)
		for(int j=i+1;j<=n;j++)
			if(k) edge[++cnt]=(edg){i,j},k++;
	printf("%d\n",cnt);
	for(int i=1;i<=cnt;i++)
		printf("%d %d\n",edge[i].x,edge[i].y);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:11:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&k);
                     ^

Judge Result