제출 #236543

#제출 시각아이디문제언어결과실행 시간메모리
236543pit4h커다란 상품 (IOI17_prize)C++14
0 / 100
12 ms384 KiB
#include "prize.h" #include <bits/stdc++.h> using namespace std; const int N = 2e5+1; int total; int n; vector<int> vec; int get_next(int pos) { int l = log2(n-1 - pos); int p = pos; auto Ask = ask(p+1); if(Ask[0] + Ask[1] != total) { return p+1; } int pref = Ask[0]; for(int i=l; i>=0; --i) { auto res = ask(p + (1<<i)); if(res[0] - pref==0 && res[0]+res[1]==total) { p+= (1<<i); } } p++; return p; } int find_best(int N) { n = N; for(int i=0; i<min(n, 500); ++i) { auto res = ask(i); total = max(total, res[0] + res[1]); } int pos = -1; while(true) { pos = get_next(pos); auto Ask = ask(pos); if(Ask[0] + Ask[1] == 0) return pos; } return 0; }
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