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1 #include2 using namespace std; 3 4 int main() 5 { 6 int n, u, d; 7 int m; 8 while(scanf("%d%d%d", &n, &u, &d) != EOF && n != 0) 9 {10 m = (n - d) / (u - d);11 if((n-d)%(u-d) != 0)12 {13 m++; 14 }15 printf("%d\n", 2*m-1); 16 }17 return 0; 18 }