1 #include<iostream> 2 using namespace std; 3 int u,d; 4 int sum(int t){ 5     if(t%2==0) 6         return (u-d)*t/2; 7     else 8         return u*(t/2+1)-d*t/2; 9 }10 int main(){11     int t,n;12     cin>>n>>u>>d;13     for(t=1;sum(t)<n;)14         t++;15     cout<<t<<endl;16     return 0;17 }