Submission #6514297

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
int n,maxn=-1,node,a;
int main()
{
	scanf("%d",&n);
	for (int i=2; i<=n; i++)
	{
		printf("? 1 %d",i);
		fflush(stdout);
		scanf("%d",&a);
		if (a>maxn)
		{
			maxn=a;
			node=i;
		}
	}
	maxn=-1;
	for (int i=1; i<=n; i++)
		if (i!=node)
		{
			printf("? %d %d",node,i);
			fflush(stdout);
			scanf("%d",&a);
			maxn=max(maxn,a);
		}
	printf("%d",maxn);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:6:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:11:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
                 ^
./Main.cpp:24:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&a);
                  ^

Judge Result