PAT B1076 wifi密码

#include <cstdio>
const int maxn = 110;
int main(){
    int N, wifi[maxn] = {0};
    char selection[20];
    scanf("%d", &N);
    for(int i = 0; i < N; i++){
        for (int j = 0; j < 4; j++) {//每行四个选项
            scanf("%s", selection);
            if(selection[2] == 'T'){
                wifi[i] = selection[0] - 'A' + 1;// A1 B2 C3 D4
            }
        }
    }
    for(int i = 0; i < N; i++){
        printf("%d", wifi[i]);
    }
    printf("\n");
    return 0;
}