Submission #370290

#	Time	Username	Problem	Language	Result	Execution time	Memory
370290		doowey	커다란 상품 (IOI17_prize)	C++14	0 / 100	3048 ms	512 KiB

prize

#include <bits/stdc++.h>
#include "prize.h"


using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair

map<int,pii> res;

pii get(int x){
    if(res.count(x)) return res[x];
    vector<int> g = ask(x);
    res[x] = mp(g[0], g[1]);
    return mp(g[0],g[1]);
}

int low = 0;
int n;

int solve(int li, int ri, int know){
    if(li > ri || know == 0) return -1;
    pii ash = get(li);
    if(ash.fi + ash.se == 0) return li;
    if(li == ri) return -1;
    int mid = (li + ri) / 2;
    int qq = mid;
    pii cc;
    while(qq >= li){
        cc = get(qq);
        if(cc.fi + cc.se == 0) return qq;
        if(cc.fi + cc.se < low){
            qq -- ;
        }
        else{
            break;
        }
    }
    int qa = solve(li, qq - 1, ash.se - cc.se);
    if(qa != -1) return qa;
    qq = mid;
    while(qq <= ri){
        cc = get(qq);
        if(cc.fi + cc.se == 0) return qq;
        if(cc.fi + cc.se < low){
            qq ++ ;
        }
        else{
            break;
        }
    }
    int qb = solve(qq, ri, know - (ash.se - cc.se));
    return qb;
}

int find_best(int _n) {
    n = _n;
    pii cur;
    for(int i = 0 ; i < min(n,500); i ++ ){
        cur = get(i);
        if(cur.fi + cur.se == 0)
            return i;
        low = max(low, cur.fi + cur.se);
    }
    int lef = 0, rig = n - 1;
    while(1){
        pii cc = get(lef);
        if(cc.fi + cc.se == 0) return lef;
        if(cc.fi + cc.se != low)
            lef ++ ;
        else
            break;
    }
    while(1){
        pii cc = get(rig);
        if(cc.fi + cc.se == 0) return rig;
        if(cc.fi + cc.se != low)
            rig -- ;
        else
            break;
    }
    pii sa = get(lef);
    pii sb = get(rig);
	return solve(lef, rig, sa.se-sb.se);
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80