PAT(Basic Level)_1014_福尔摩斯的约会

#include<stdio.h>#include<string.h>int main(){    char str1[61],str2[61],str3[61],str4[61];    char week[7][5]={"MON","TUE","WED","THU","FRI","SAT","SUN"};    scanf("%s%s%s%s",str1,str2,str3,str4);    int i,flag=0;    for(i=0;str1[i] && str2[i];i++){        if(str1[i]==str2[i]){            if(!flag && str1[i]>='A' && str1[i]<='G'){                flag=1;                printf("%s ",week[str1[i]-'A']);            }            else if(flag){                if(str1[i]>='0' && str1[i]<='9'){                    printf("%02d:",str1[i]-'0');                    break;                }                else if(str1[i]>='A' && str1[i]<='N'){                    printf("%02d:",str1[i]-'A'+10);                    break;                }            }        }    }    for(i=0;str3[i] && str4[i];i++){        if(str3[i]==str4[i]){            if((str3[i]>='a'&&str3[i]<='z')            ||(str3[i]>='A'&&str3[i]<='Z')){                printf("%02d",i);            }        }    }    return 0;}