1.总结：
时 = 秒数//3600
分 = 秒数%3600//60
秒= 秒数%60

print(‘{:02d}:{:02d}:{:02d}’.format(res//3600, res%3600//60, res%60))
{:02d}表示输入的整数是两位不足前面补0，d表示整数

# 时间计算函数
def time_caculate(t):m1 = t[0].split(":")m2 = t[1].split(":")# 如果首位数字是0不能进行乘法操作,比如05要转换为5if m1[0][0] == "0":m1[0] = m1[0][1]if m1[1][0] == "0":m1[1] = m1[1][1]if m1[2][0] == "0":m1[2] = m1[2][1]if m2[0][0] == "0":m2[0] = m2[0][1]if m2[1][0] == "0":m2[1] = m2[1][1]if m2[2][0] == "0":m2[2] = m2[2][1]stamp1 = 3600 * int(m1[0]) + 60 * int(m1[1]) + int(m1[2])stamp2 = 3600 * int(m2[0]) + 60 * int(m2[1]) + int(m2[2])if len(t) == 3:stamp2 += int(t[2][2]) * 3600 * 24# 返回时间戳return stamp2 - stamp1# 输入数据组数
T = int(input())# 键盘录入组数,打印结果
for _ in range(T):t1 = str(input()).split(" ")t2 = str(input()).split(" ")# 计算t1和t2的时间差res1 = time_caculate(t1)res2 = time_caculate(t2)res = int((res1 + res2) / 2)print('{:02d}:{:02d}:{:02d}'.format(res//3600, res%3600//60, res%60))

题目链接