Dona Lesma

Dona Lesma

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Dona Lesma é uma esportista e aventureira que deseja alcançar o topo do muro do jardim em que vive neste verão. Todos os dias, ela sobe uma certa distância fixa, mas à noite, enquanto dorme, ela escorrega para baixo uma outra distância fixa. Dadas a altura do muro, a distância que Dona Lesma sobe a cada dia e a distância que ela desce a cada noite, calcule quantos dias ela levará para chegar ao topo do muro.

Entrada A altura do muro A; a distância que Dona Lesma sobe a cada dia S; e a distância que ela escorrega para baixo a cada noite D.

Saída: Um único inteiro representando o número de dias que Dona Lesma demorará para chegar ao topo do muro.


    dias_para_topo(4, 2, 1) >> 3
dias_para_topo(12, 5, 2) >> 4
dias_para_topo(10000, 100, 50) >> 199
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