AC代码(我们用多的把少的包围起来)
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#include <bits/stdc++.h>
#include <iostream>
using namespace std;
int main()
{
freopen("black.in", "r", stdin);
freopen("black.out","w",stdout);
int n ,m, i, t;
scanf("%d %d",&n,&m);
char c = '@', d = '.', t1;
if(n>m)
{
t = n, n = m, m = t;
t1 = c, c = d, d = t1;
}
printf("%d %d\n",2*m, 3);
for(i = 0;i<(m-n);i++)
printf("%c%c%c\n%c%c%c\n",c,c,c,c,d,c);
for(i = 0;i<n;i++)
printf("%c%c%c\n%c%c%c\n",c,c,c,d,d,d);
return 0;
}