uva 573 The Snail

#include <stdio.h>

void func(int h, int u, int d, int f)
{
/*
h---井的高度
u---第一个白天能够爬的高度
d---晚上下滑的高度
f---疲劳因子
*/

double delete_height;
delete_height = u*(f/100.0);
double cur_height, cur_climb_height;
int day;

if(d > u)
{
if(u > h)
{
printf("success on day 1\n");
return;
}
else
{
printf("failure on day 1\n");
return;
}
}
else if(d == u)
{
if(u > h)
{
printf("success on day 1\n");
return;
}
else
{
printf("failure on day 2\n");
return;
}
}
else
{
cur_height = u;
cur_climb_height = u;
day = 1;
while(1)
{
if(cur_height > h)
{
printf("success on day %d\n", day);
return;
}

cur_height -= d;
if(cur_height < 0)
{
printf("failure on day %d\n", day);
return;
}

cur_climb_height -= delete_height;
if(cur_climb_height < 0)
cur_climb_height = 0;
cur_height += cur_climb_height;
day ++;
}

}
}

int main(void)
{
int h, u, d, f;

while(1)
{
scanf("%d %d %d %d", &h, &u, &d, &f);
if(!h)
break;

func(h, u, d, f);
}

return 0;
}