Problema
Split a duration into hours, minutes, and seconds. Write units as h, m, and s, in that order, with one space between units. Omit any zero-valued unit, except that zero seconds is written as 0s.
Implement format_duration(seconds).
Input
seconds: The total duration in seconds.
Output
Return the formatted duration, for example 2h 2m 5s.
Restricciones
0 ≤ seconds ≤ 1,000,000,000. Hours may exceed 23; this is a duration, not a time of day.
Ejemplos
Entrada:
seconds = 7325
Salida esperada:
expected = "2h 2m 5s"Entrada:
long long seconds = 7325;
Salida esperada:
std::string expected = "2h 2m 5s";Entrada:
long seconds = 7325;
Salida esperada:
string expected = "2h 2m 5s";Explicación
7325 = 2 × 3600 + 2 × 60 + 5.
Entrada:
seconds = 120
Salida esperada:
expected = "2m"Entrada:
long long seconds = 120;
Salida esperada:
std::string expected = "2m";Entrada:
long seconds = 120;
Salida esperada:
string expected = "2m";Explicación
120 seconds is exactly 2 minutes. Omit the zero hours and seconds.
Cómo abordarlo
Inténtalo primero por tu cuenta y luego abre las pistas una a una.
Pista 1
Break the total seconds into larger units first, then format only the nonzero parts.
Pista 2
Keep hours, minutes, and seconds in that order, with spaces between included units.
Pista 3
If every larger unit is zero, still make sure the output is exactly 0s when the duration is zero.
Complejidad esperada
O(1) time, O(1) extra space
Referencias
Este reto está adaptado para CodeUtility. Sigue el enunciado y las restricciones indicadas arriba.