pku1563.cpp

这是ACM 方面的资料 是PKU的 北京大学的出来的

#include <stdio.h>

void Solve(int H, int U, int D, int F)
{
	int i;
	double pos;
	double up = U;
	pos = 0;
	i = 0;
	do
	{
		i++;
		pos += (up > 0) ? up : 0;
		if (pos > H)
		{
			break;
		}
		pos -= D;
		up = up - U * F / 100.0;
	}
	while (pos >= 0 && pos <= H);
	if (pos >= H)
	{
		printf("success on day %d\n", i);
	}
	else
	{
		printf("failure on day %d\n", i);
	}
}

int main()
{
	int H, D, U, F;
	while (scanf("%d %d %d %d", &H, &U, &D, &F) != -1 && H)
	{
		Solve(H, U, D, F);
	}
	return 0;
}