2023年12月24日发(作者：)

1 04:151 16:400 21:07#includeusing namespace std;

int main()

{

int n;

int a, b, c;

cin >> n;

for (int i = 0; i < n; i++)

{

scanf("%d%d:%d", &a, &b, &c);

if (a == 0)

printf("%d %02d:%02dn", a, b, c);

else

{

if (a%2==1)

{

c = ((b % 2) * 60 + c) / 2;

b = b / 2;

}

else

{

b = b + 24;

c = ((b % 2) * 60 + c) / 2;

b = b / 2;

}

printf("%d %02d:%02dn", (a + 1) / 2, b, c);

}

}

}

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