Submission #7889125

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
inline int read()
{
	int number_read=0,if_ok_read=1;
	char ch_read=getchar();
	while(ch_read<'0'||ch_read>'9')
	{
		if(ch_read=='-')
			if_ok_read=-1;
		ch_read=getchar();
	}
	while(ch_read>='0'&&ch_read<='9')
	{
		number_read=number_read*10+ch_read-'0';
		ch_read=getchar();
	}
	return number_read*if_ok_read;
}
inline void write(int x_write)
{
    if(x_write<0)
	{
    	putchar('-');
		x_write=-x_write;
	}
    if(x_write>9)
		write(x_write/10);
    putchar(x_write%10+'0');
    return ;
}
int main()
{
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	int a,b,s,n=read();
    for(int i=2;i<=n;i++)  
    {
        printf("? 1 %d\n",i);
        fflush(stdout);  
        s=read();
        if(a<s)
		{
			a=s;
			b=i;
		} 
    }
    for(int i=1;i<=n;i++)
		if(i!=b)  
    	{
        	printf("? %d %d\n",b,i);
        	fflush(stdout);
        	s=read();
        	if(a<s)
				a=s;  
    	}
    printf("! %d\n",a); 
	return 0;
}

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