題目鏈接：https://pintia.cn/problem-sets/994805260223102976/problems/994805295203598336

題解：

 1 #include <iostream>
 2 using namespace std;
 3 
 4 int main() {
 5     int c1, c2, hh, mm, ss;
 6     cin >> c1 >> c2;
 7     int temp = (c2 - c1 + 50) / 100;//四舍五入，易錯
 8     hh = temp / 3600, mm = temp % 3600 / 60, ss = temp % 3600
 
 % 60;
 9     if (hh < 10) cout << "0";
10     cout << hh << ":";
11     if (mm < 10) cout << "0";
12     cout << mm << ":";
13     if (ss < 10) cout << "0";
14     cout << ss;
15     return 0;
16 }

1026 程序運行時間