Problema
Build a number triangle: row i (counting from 1) lists the numbers 1, 2, …, i.
Implement number_triangle(rows).
Input
rows: The number of rows.
Output
Return the triangle as a list of rows.
Restricciones
0 ≤ rows ≤ 30
Ejemplos
Ejemplo 1
Entrada:
rows = 3
Salida esperada:
expected = [
[1],
[1, 2],
[1, 2, 3]
]Entrada:
long long rows = 3;
Salida esperada:
std::vector<std::vector<long long>> expected = {
{1},
{1, 2},
{1, 2, 3}
};Entrada:
long rows = 3;
Salida esperada:
long[][] expected = new long[][] {
new long[] {1},
new long[] {1, 2},
new long[] {1, 2, 3}
};Explicación
Rows are [1], [1, 2] and [1, 2, 3].
Ejemplo 2
Entrada:
rows = 0
Salida esperada:
expected = []Entrada:
long long rows = 0;
Salida esperada:
std::vector<std::vector<long long>> expected = {};Entrada:
long rows = 0;
Salida esperada:
long[][] expected = new long[][] {};Explicación
No rows were requested, so the triangle is empty.
Referencias
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