제출 #673008

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
673008		ghostwriter	커다란 상품 (IOI17_prize)	C++17	90 / 100	84 ms	336 KiB

prize

#include "prize.h"
// #pragma GCC optimize ("Ofast")
// #pragma GCC target ("avx2")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
    #include <debug.h>
	#include "grader.cpp"
#else
    #define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
// #define int long long
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
#define FOR(i, l, r) for (int i = (l); i <= (r); ++i)
#define FOS(i, r, l) for (int i = (r); i >= (l); --i)
#define FRN(i, n) for (int i = 0; i < (n); ++i)
#define FSN(i, n) for (int i = (n) - 1; i >= 0; --i)
#define EACH(i, x) for (auto &i : (x))
#define WHILE while
template<typename T> T gcd(T a, T b) { T d2 = (a | b) & -(a | b); a /= d2; b /= d2; WHILE(b) { a = a % b; swap(a, b); } return a * d2; }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
void _assert(bool statement) { if (statement) return; cerr << "\n>> Assertion failed!\n"; exit(0); }
void _assert(bool statement, const str &message) { if (statement) return; cerr << "\n>> Assertion failed: " << message << '\n'; exit(0); }
void _error(const str &message) { cerr << "\n>> Error: " << message << '\n'; exit(0); }
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    GOAT
----------------------------------------------------------------
*/
int find_best(int n) {
	int pos = -1;
	vi ansp;
	FRN(i, min(n, 474)) {
		if (pos == -1) {
			pos = i;
			ansp = ask(i);
			if (ansp[0] + ansp[1] == 0) return i;
		}
		else {
			vi tmp = ask(i);
			if (tmp[0] + tmp[1] == 0) return i;
			if (ansp[0] + ansp[1] < tmp[0] + tmp[1]) {
				pos = i;
				ansp = tmp;
			}
		}
	}
	int cnt = 0, pre = pos;
	WHILE(1) {
		int l = pre + 1, r = n - 1, ans = -1;
		WHILE(l <= r) {
			int mid = l + (r - l) / 2;
			vi tmp = ask(mid);
			if (tmp[0] + tmp[1] == 0) return mid;
			if (tmp[0] + tmp[1] < ansp[0] + ansp[1]) {
				ans = mid;
				r = mid - 1;
			}
			else if (tmp[0] - ansp[0] > cnt) r = mid - 1;
			else l = mid + 1;
		}
		++cnt;
		pre = ans;
	}
	return 0;
}
/*
8
3 2 3 1 3 3 2 3
*/

• Subtask 1: 20 / 20
• Subtask 2: 70 / 80