#include
using namespace std;
int main ()
{
int n, u, d;
while ( cin >> n >> u >> d && n && u && d) {
int current = 0;
int minute = 0;
while ( current < n ) { current += u; minute ++; if ( current < n ) { current -= d; minute ++; } } cout << minute << endl; } return 0; } [/sourcecode]
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