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https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
12 lines
219 B
C++
12 lines
219 B
C++
#include <stdio.h>
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int main()
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{
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__int64 n,s;
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while(~scanf("%I64d",&n))
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{
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s=((n*(n+1)/2%10000)*(n*(n+1)/2%10000))%10000;
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printf("%04I64d\n",s);
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}
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return 0;
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}
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