题解 | 小乐乐定闹钟

#include <iostream>
using namespace std;

int main() {
    int hour, min, n;
    scanf("%d:%d %d", &hour, &min, &n);
    hour = ((min + n) / 60 + hour) % 24;
    min = (min + n) % 60;

    printf("%02d:%02d", hour, min);
}
// 64 位输出请用 printf("%lld")