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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
17 lines
252 B
C++
17 lines
252 B
C++
#include<stdio.h>
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__int64 a[2500];
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int main()
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{
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__int64 sum,i,n;
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a[1]=1;
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for(i=3;i<=2500;i+=2)
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{
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a[i]+=a[i-2]+i*i;
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}
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while(scanf("%I64d",&n)!=EOF)
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{
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printf("%I64d\n",a[n]);
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}
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return 0;
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}
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