#include "prize.h" #include<bits/stdc++.h> using namespace std; const int N=2e5+5; struct fenwick{ int t[N]; void add(int i,int v){ while(i<N)t[i]+=v,i+=i&-i; } int read(int i){ int res=0; while(i>0)res+=t[i],i-=i&=-i; return res; } }f; int n; int ans=-1; vector<vector<int>> mem(N); vector<int>& ask2(int x){ if(mem[x].empty())mem[x]=ask(x); return mem[x]; } void bsearch(){ int l=0,r=n-1; while(l<r){ int m=(l+r)/2; auto &res=ask2(m); if(res[0]+res[1]==0)return void(ans=m); if(res[0]){ res[0]--; r=m-1; }else{ res[1]--; l=m+1; } } auto &res=ask2(l); if(res[0]+res[1]==0)return void(ans=l); } int find_best(int _n) { n=_n; int l=0,r=n-1; while(ans==-1)bsearch(); return ans; }

prize.cpp: In function 'int find_best(int)':
prize.cpp:49:6: warning: unused variable 'l' [-Wunused-variable]
   49 |  int l=0,r=n-1;
      |      ^
prize.cpp:49:10: warning: unused variable 'r' [-Wunused-variable]
   49 |  int l=0,r=n-1;
      |          ^