30 lines
560 B
C++
30 lines
560 B
C++
#include<stdio.h>
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#include<math.h>
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int main()
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{
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int k,i,j,n,ans;
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while(~scanf("%d",&n))
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{
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if(!n)
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{
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printf("1\n");
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continue;
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}
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ans=0;
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k=(int)sqrt(n/2.0);
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for(i=0;i<=k;++i)
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{
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j=(int)sqrt(n-i*i);
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if(i*i+j*j==n)
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{
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if(i==j||i==0||j==0)
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ans+=4;
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else
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ans+=8;
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}
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}
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printf("%d\n",ans);
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}
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return 0;
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}
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