pat乙级1014 福尔摩斯的约会

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>

int min(int a,int b);
int min(int a,int b){
    return a<b?a:b;
}
int main()
{
    
    char a[61],b[61],c[61],d[61];
    scanf("%s %s %s %s",a,b,c,d);
    int flag=0;
    for(int i=0;i<min(strlen(a),strlen(b));i++){

        if((a[i]==b[i])&&((a[i]>=65&&a[i]<=71)&&(flag==0))){
            flag++;
            if(a[i]=='A'){
                printf("MON ");
            }else if(a[i]=='B'){
                printf("TUE ");
            }else if(a[i]=='C'){
                printf("WED ");
            }else if(a[i]=='D'){
                printf("THU ");
            }else if(a[i]=='E'){
                printf("FRI ");
            }else if(a[i]=='F'){
                printf("SAT ");
            }else if(a[i]=='G'){
                printf("SUN ");
            }
            continue;
        }

        if((flag==1)&&(a[i]==b[i])&&((a[i]>=48&&a[i]<=57)||(a[i]>=65&&a[i]<=78))){
            if(a[i]>=48&&a[i]<=57){
                printf("0");
                printf("%c",a[i]);
            }
            else if(a[i]>=65&&a[i]<=78){
                printf("%d",(int)(a[i]-55));
            }  
            break;
        }
       
    }
    printf(":");
    
    for(int j=0;j<min(strlen(c),strlen(d));j++){
        if((c[j]==d[j])&&((c[j]>=65&&c[j]<=90)||(c[j]>=97&&c[j]<=122))){
            if(j>=0&&j<=9){
                printf("0%d",j);
            }else{
                printf("%d",j);
            }   
            break; 
        }
        
    }
    return 0;
}