后3个测试点WA , 求救！

HZT1121 @ 2024-05-01 19:35:39

// P5707
# include <cstdio>
using namespace std;

int main()
{
    int s, v, t;
    scanf("%d %d", &s, &v);
    if(s % v == 0)
        t = (s / v);
    else
        t = (s / v) + 1;
    if(t >= 24 * 60) t -= 24 * 60;
    int t2 = 480;
    t = t2 - 10 - t;
    int x, f;
    x = t / 60;
    f = t % 60;
    printf("%02d%c%02d", x, ':', f);
    return 0;
}

by RH233 @ 2024-05-01 20:08:32

没有考虑到凌晨0点以前出发的情况(即用时大于480min). 例如当输入10000 5时，代码输出为-1：-30. 为了解决这个问题，需要进行特判

AC代码：

# include <cstdio>
using namespace std;
int main()
{
    int s, v, t;
    scanf("%d %d", &s, &v);
    if(s % v == 0)
        t = (s / v);
    else
        t = (s / v) + 1;
    if(t >= 24 * 60) t -= 24 * 60;
    int t2 = 480;
    //t = t2 - 10 - t;负数.
    if(t+10>t2) t=24*60-t-10+480;
    else t=t2-10-t; 
    int x, f;
    x = t / 60;
    f = t % 60;
    printf("%02d%c%02d", x, ':', f);
    return 0;
}

by HZT1121 @ 2024-05-02 12:51:13

@RH233 谢谢，已AC，此贴完。