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https://github.com/Kiritow/OJ-Problems-Source.git
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15 lines
275 B
C++
15 lines
275 B
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <queue>
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using namespace std;
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int main()
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{
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int N,M;
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while(scanf("%d%d",&M,&N)!=EOF)
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{
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printf("%d\n",(M+(M-(N-1)/2)+1)*(N-1)/4+(M+(M-(N+1)/2)+1)*(N+1)/4);
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}
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return 0;
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}
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