#include<bits/stdc++.h>
#include <tuple>
using namespace std;
string s[555][5];int T=0;int a[555][5];char chu[5]={'o','A','B','C','D'};
int main(){
cin>>T;
for (int i=1;i<=T;++i) {
bool da=0,xiao=0;int o=0;
for (int j=1;j<=4;++j) {
cin>>s[i][j];a[i][j]=(s[i][j].size());
}
for (int j=1;j<=4;++j) {
int jishu=0;
for(int k=1;k<=4;++k){
if(j==k){
continue;
}
if(a[i][j]>a[i][k]){
jishu++;
}
if (jishu==3) {
da=1;o=j;
}
}
}
for (int j=1;j<=4;++j) {
int jishu=0;
for(int k=1;k<=4;++k){
if(j==k){
continue;
}
if(a[i][j]<a[i][k]){
jishu++;
}
if (jishu==3) {
xiao=1;o=j;
}
}
}
if ((da||xiao)&&(!(da&&xiao))) {
cout<<chu[o]<<endl;
}else {
cout<<'C'<<endl;
}
}
return 0;
}
又臭又长,有没有大佬能优化一下三长一短那部分的判断QWQ

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