#include <bits/stdc++.h>   using namespace std;   int main() {     int vp, vd, t, f, c, ans;     double cc, d;     scanf( %d%d%d%d%d , &vp, &vd, &t, &f, &c);     if (vd <= vp) {       printf( 0 n );       return 0;     }     d = vp * t;     cc = c;     ans = 0;     while (1) {       if (d + d / (vd - vp) * vp >= cc - 1e-9) break;       ans++;       d = d + (2 * d / (vd - vp) + f) * vp;     }     printf( %d n , ans);     return 0;   }   