03 时间转换
#include<stdio.h>
int main()
{
unsigned int N;
unsigned int h,m,s;
unsigned int tempm,temps;
scanf("%u",&N);
tempm=N%3600;
temps=tempm%60;
s=temps;
m=(tempm-temps)/60;
h=(N-tempm)/3600;
printf("%u:%u:%u",h,m,s);
return 0;
}