제출 #390477

#제출 시각아이디문제언어결과실행 시간메모리
390477Keshi커다란 상품 (IOI17_prize)C++17
20 / 100
130 ms560 KiB
//In the name of God #include <bits/stdc++.h> #include "prize.h" using namespace std; typedef int ll; typedef pair<ll, ll> pll; const ll maxn = 2e5 + 100; const ll mod = 1e9 + 7; const ll inf = 1e9; #define pb push_back #define Mp make_pair #define F first #define S second #define Sz(x) ll((x).size()) #define all(x) (x).begin(), (x).end() vector<pair<ll, pll> > vec; int find_best(int n){ ll p = n / 500; ll x = 0; for(ll i = 0; i < n; i += p){ auto f = ask(i); vec.pb(Mp(i, Mp(f[0], f[1]))); x = max(x, f[0] + f[1]); } ll ptr = 0; while(ptr < n){ auto f = ask(ptr); vec.pb(Mp(ptr, Mp(f[0], f[1]))); if(f[0] + f[1] == 0) return ptr; if(f[0] + f[1] != x){ ptr++; continue; } ll l = ptr, r = n; for(auto i : vec){ if(i.F < ptr) continue; if(i.S.F == f[0] && i.S.S == f[1]) l = max(l, i.F); else r = min(r, i.F); } while(r - l > 1){ ll mid = (l + r) >> 1; auto f2 = ask(mid); vec.pb(Mp(mid, Mp(f2[0], f2[1]))); if(f2[0] == f[0] && f2[1] == f[1]) l = mid; else r = mid; } ptr = r; } return 0; }
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