2659: [Beijing wc2012]算不出的算式|找规律

传说中到找规律题QAQ 扒代码大法好

#include<iostream>#include<cstdio>using namespace std;long long p,q;int main(){    scanf("%lld%lld",&p,&q);    if (p==q) p++;    cout << (p>>1)*(q>>1);    return 0;}