Contest​ ​Reminder

#include<stdio.h>
int main()
{
    int h,m,n,i,t,a,b,c;
    char ch;
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        scanf("%d %c %d",&h,&ch,&m);
        //scanf("%d",&m);
        t = (h*60)+m;

        if(t>779)
        {
            a = t-720;
            b = a/60;
            c = a%60;
            printf("Case %d:",i+1);
            if(c==0)
                printf(" %d:00 PM\n",b);
            else
                printf(" %d:%d PM\n",b,c);
        }
        else if(t>719&&t<=779)
        {
            a = t-720;
            c = a%60;
            printf("Case %d:",i+1);
            if(c==0)
                printf(" 12:00 PM\n");
            else
                printf(" 12:%d PM\n",c);

        }
        else if(t>=0&&t<=59)
        {
            printf("Case %d:",i+1);
            if(t==0)
                printf(" 12:00 AM\n");
            else
                printf(" 12:%d AM\n",t);
        }
        else
        {
            printf("Case %d:",i+1);
            if(m==0)
                printf(" %d:00 AM\n",h);
            else
                printf(" %d:%d AM\n",h,m);
        }
    }
}