我哪错了？```cpp

include <bits/stdc++.h>

using namespace std; int main(int argc, char** argv) { int y,k,s,z; cin>>y>>k; for(int i=0; i<99999;) { y--; s++; if(s>=k) { s=s-3; y++; } if(y==0) { break; } z++; }

cout<<z;
return 0;

}