제출 #89232

#제출 시각아이디문제언어결과실행 시간메모리
89232zoomswk커다란 상품 (IOI17_prize)C++17
90 / 100
94 ms576 KiB
#include "prize.h" #include <vector> #include <algorithm> using namespace std; int find_best(int n) { if(n <= 3000){ for(int i=0; i<n; i++){ vector<int> resp = ask(i); if(resp[0]+resp[1] == 0) return i; } } vector<int> resp; int m = 0; for(int i=0; i<500; i++){ resp = ask(i); if(resp[0]+resp[1] == 0) return i; m = max(m, resp[0]+resp[1]); } int bnd=0; for(int i=0; i<m; i++){ int l=bnd, r=n-1, res=-1; while(l<=r){ int mid = (l+r)/2; resp = ask(mid); if(resp[0]+resp[1] == 0) return mid; if(resp[0]+resp[1] != m) res = mid, r = mid-1; else if(resp[0] == i) l = mid+1; else r = mid-1; } bnd = res+1; } return 0; }
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