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#include<bits/stdc++.h>
using namespace std;
int main()
{
int a, b, n;
double m;
for(a = 1; a <= 9; a++)
for(b = 0; b <= 9; b++)
n = 1100*a + 11*b;
m = sqrt(n);
if(floor(m+0.5) == m) printf("(1):%d\n", n);//判断两个浮点数是否相等，floor函数的作用是返回m的整数部分，加上0.5是为了减少误差影响。
}
return 0;
