UVa 573 - The Snail

#include <bits/stdc++.h>
#define LL  long long
#define SZ(x) ((int)(x).size())
#define ALL(x) (x).begin(),(x).end()
#define REP(i,n) for(int i=0;i<n;i++)
#define REV(i,n) for(int i=n-1;i>=0;i--)
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define pri(a) cout<<a<<endl
#define prii(a,b) cout<<a<<" "<<b<<endl
#define priii(a,b,c) cout<<a<<" "<<b<<" "<<c<<endl
#define hi printf("Hello World\n");
#define pcs printf("CASE# %d:\n", ++cs);
#define WRITE(fn) freopen(fn, "w", stdout);
using namespace std;

/****/ int cs = 0;
const int INF = 1<<29;
const int MX  = 1e5+10;

int main()
{
    double well,init,climb,slide,fatig;

    while(cin>>well>>climb>>slide>>fatig and well)
    {
        double ht = 0, cnt = 0;

        double ff = climb * (fatig/100);

        while(1)
        {
            cnt++;

            if(climb>=0)
                ht += climb;

            if(ht>well) break;

            ht -= slide;

            climb -= ff;

            if(ht<0) break;
        }

        if(ht>well) printf("success on day %.0lf\n", cnt);
        else printf("failure on day %.0lf\n", cnt);
    }
    return 0;
}