Submission #282390

#	Time	Username	Problem	Language	Result	Execution time	Memory
282390		doowey	The Big Prize (IOI17_prize)	C++14	20 / 100	110 ms	888 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;

int sol = -1;

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


int find_best(int n) {
    int li=-1;
    int nl, nr;
    int cnt;
    int value;
    vector<int> has;
    while(1){
        nl=li+1,nr=n;
        int mid;
        while(nl + 1 < nr){
            mid = (nl + nr) / 2;
            pii cur = get(mid);
            value = cur.fi + cur.se;
            cnt = 0;
            for(auto x : has){
                if(x < value){
                    cnt ++ ;
                }
            }
            if(cur.fi > cnt){
                nr = mid-1;
            }
            else{
                nl = mid;
            }
        }
        pii cur = get(nl);
        value = cur.fi + cur.se;
        has.push_back(value);
        li=nl;
        if(sol != -1) return sol;
    }
    assert(0);
	return -1;
}

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