https://pintia.cn/problem-sets/994805046380707840/exam/problems/994805119944605696

#include<bits/stdc++.h>

using namespace std;

int main()
{
    int hh,mm;
    scanf("%02d:%02d",&hh,&mm);
    if(hh>=12){
        if(hh==12&&mm==0){
            printf("Only %02d:%02d.  Too early to Dang.",hh,mm);
        }
        if(mm>0){
            hh++;
        }
        for(int i=1;i<=hh-12;i++)
        printf("Dang");
    }
    if(hh<12) {
        printf("Only %02d:%02d.  Too early to Dang.",hh,mm);
    }
    return 0;
}