题目：

（ps:乙级的一道原题，直接copy过来用了，贴在此处~）

#include
     
      #include
      
       int Min(int a,int b);int main(){    char s1[70],s2[70],s3[70],s4[70];    int i,hour,minute,len,tag=0,add=0;    char ch1,ch2,time[24]={
    '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N'};    scanf("%s",s1);    scanf("%s",s2);    scanf("%s",s3);    scanf("%s",s4);    len=Min(strlen(s1),strlen(s2));    for(i=0;i
       
        ='A'&&s1[i]<='G')){ch1=s1[i];tag++;continue;}        if(tag==1&&s1[i]==s2[i]&&((s1[i]>='0'&&s1[i]<='9')||(s1[i]>='A'&&s1[i]<='N'))){ch2=s1[i];tag++;}        if(tag==2)break;    }    switch(ch1){        case 'A':printf("MON ");break;        case 'B':printf("TUE ");break;        case 'C':printf("WED ");break;        case 'D':printf("THU ");break;        case 'E':printf("FRI ");break;        case 'F':printf("SAT ");break;        case 'G':printf("SUN ");break;    }    len=Min(strlen(s3),strlen(s4));    for(i=0;i
        
         ='a'&&s3[i]<='z')||(s3[i]>='A'&&s3[i]<='Z')))break;    }    minute=i;    if(minute>=60){add=minute/60;minute=minute%60;}    for(hour=0;hour<24;hour++){        if(time[hour]==ch2)break;    }    hour=(hour+add)%24;    if(hour<=9)printf("0%d:",hour);    else printf("%d:",hour);    if(minute<=9)printf("0%d",minute);    else printf("%d",minute);}int Min(int a,int b){    int t;    t=a