11335 - Discrete pursuit/11335.cpp

   1 #include <iostream>
   2
   3 using namespace std;
   4
   5 int main(){
   6   unsigned int a,u,v;
   7   while (cin >> a >> u >> v){
   8     if (a == 0){
   9       cout << "0" << endl;
  10     }else{
  11       unsigned int min, px, lx, py, ly, t;
  12       px = 0;
  13       lx = a;
  14       t = 0;
  15       while (px < lx){
  16         px = (t*(t+1))/2;
  17         lx = a + u*t;
  18         ++t;
  19       }
  20       --t;
  21       min = t;
  22
  23       py = ly = 0;
  24       t = 1;
  25       while (py < ly){
  26         py = (t*(t+1))/2;
  27         ly = v*t;
  28         ++t;
  29       }
  30       --t;
  31
  32       if (t > min) min = t;
  33       cout << min << endl;
  34     }
  35   }
  36   return 0;
  37 }