UVa12545

//UVa12545 - Bits Equalizer//贪心#include<iostream>#define MIN(X,Y) (((X)>(Y))?(Y):(X))using namespace std;int main(){//freopen("UVa12545.in","r",stdin);int N, kase = 0;cin>>N;while(N--){string S,T;int count = 0, bit[6];bit[0] = bit[1] = bit[2] = bit[3] = bit[4] = 0;cin>>S>>T;for(int i = 0; i<S.size(); i++){bit[T[i] -'0'+4]++;//all T[0]; if(S[i] != T[i])if(S[i] == '?'){ count++; continue;}else {bit[S[i]-'0']++; continue;}bit[S[i]-'0'+2]++;//相等时候的s[0];}if(bit[2]+bit[0]+count < bit[4]){ cout<<"Case "<<++kase<<": -1\n"; continue;}count += bit[0]+bit[1]-MIN(bit[0],bit[1]);cout<<"Case "<<++kase<<": "<<count<<"\n";}return 0;}//已AC