제출 #617799

#제출 시각아이디문제언어결과실행 시간메모리
617799AbdelmagedNour커다란 상품 (IOI17_prize)C++17
93 / 100
66 ms5248 KiB
#include<bits/stdc++.h> using namespace std; #include "prize.h" int MAX,res=-1; vector<vector<int>>v; void divide(int l,int r){ if(l>r||res!=-1)return; if(l==r){ if(v[l].size()==0)v[l]=ask(l); if(v[l][0]+v[l][1]==0)res=l; return; } int md=(l+r)>>1; if(v[md].size()==0)v[md]=ask(md); if(v[md][0]+v[md][1]==0)res=md; if(v[md]!=v[l-1]&&v[md][0])divide(l,md-1); if(v[md]!=v[r+1]&&v[md][1])divide(md+1,r); } int find_best(int n){ v.clear(); v.resize(n); MAX=0; res=-1; for(int i=0;i<min(n,500);i++){ vector<int>x=ask(i); v[i]=x; if(x[0]+x[1]==0)return i; MAX=max(MAX,x[0]+x[1]); } if(v[n-1].size()==0)v[n-1]=ask(n-1); if(v[n-1][0]+v[n-1][1]==0)return n-1; divide(1,n-2); return res; }
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