제출 #659219

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
659219		jiahng	커다란 상품 (IOI17_prize)	C++14	90 / 100	59 ms	5292 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int,int> pi;
typedef vector <int> vi;
typedef vector <pi> vpi;
typedef pair<pi, ll> pii;
typedef set <ll> si;
typedef long double ld;
#define f first
#define s second
#define mp make_pair
#define FOR(i,s,e) for(int i=s;i<=int(e);++i)
#define DEC(i,s,e) for(int i=s;i>=int(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define maxn 200010
#define INF (ll)1e9
#define MOD 1000000007
typedef pair <vi, int> pvi;
typedef pair <int,pi> ipi;
typedef vector <pii> vpii;
 
int N;
vi memo[maxn];
vi query(int x){
    if (memo[x].empty()) memo[x] = ask(x);
    return memo[x];
}
const int sqrtn = 472;
int find_best(int n) {
    N = n;
    pi lollipop = pi(-1,-1);
    FOR(i,0,min(N-1,sqrtn)){
        vi v = query(i);
        lollipop = max(lollipop, pi(v[0] + v[1], -i));
    }
    lollipop.s *= -1;
    int x = lollipop.s;
    int tar = lollipop.s;
    vi non_lollipops;
    FOR(i,0,x-1) non_lollipops.pb(i);
    while (x < N){
        int start = x;
        DEC(i,30,0) if (x + (1<<i) < min(start + sqrtn, N)){
            vi v = query(x+(1<<i));
            if (v[0] == tar && v[0] + v[1] == lollipop.f) x += (1 << i);
        }
        x++;
        while (x < N){
            vi v = query(x);
            if (v[0] + v[1] == lollipop.f) break; 
            non_lollipops.pb(x); x++; tar++;
        }
    }
 
    aFOR(i, non_lollipops){
        //cout << i << ' ';
        vi v = query(i);
        if (v[0] + v[1] == 0)  return i;
    }
    return 0;
}

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