Submission #260421

#	Time	Username	Problem	Language	Result	Execution time	Memory
260421		aggu_01000101	The Big Prize (IOI17_prize)	C++14	20 / 100	202 ms	19560 KiB

prize

#include <iostream>
#include "prize.h"
#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp>
#include <functional>
#include <algorithm>
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <map>
#include <bits/stdc++.h>
#define initrand mt19937 mt_rand(time(0));
#define rand mt_rand()
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,
tree_order_statistics_node_update> oset;
//#define int long long
#define INF 10000000000000000
#define MOD 1000000007
initrand;
/*vector<int> ask(int x){
    cout<<"QUERY AT "<<x<<endl;
    vector<int> tr = {0, 0};
    cin>>tr[0]>>tr[1];
    return tr;
}*/
int get(int l, int r){
    return (((rand%(r-l+1))) + l);
}
signed find_best(signed n){
    oset v;
    for(int i =1 ;i<=n;i++) v.insert(i);
    bool found = false;
    map<int, int> first;
    map<int, int> last;
    int ans = -1;
    int q = 0;
    while(!found){
        int tq = get(0, v.size() - 1);
        signed ta = *v.find_by_order(tq); //we will ask this
        vector<int> qq = ask(ta-1);
        q++;
        assert(q<=10000);
        if(qq[0] == qq[1] && qq[1]==0){
            ans = ta;
            found = true;
            continue;
        }
        int ll = ta;
        if(first[qq[0]] != 0) ll = min(ll, first[qq[0]]);
        else first[qq[0]] = ta;
        int rr = ta + 1;
        rr = max(rr, last[qq[1]]);
        int rrr = v.order_of_key(rr) - 1;
        int lll = v.order_of_key(ll);
        for(int temp = rrr;temp>=lll;temp--) v.erase(v.find_by_order(temp));
        first[qq[0]] = min(first[qq[0]], ta);
        last[qq[1]] = max(last[qq[1]], ta);
        /*cout<<"Remaining array: "<<endl;
        for(int j: v){
            cout<<j<<" ";
        }
        cout<<endl;*/
    }
    return (ans-1);
}

/*signed main(){
    signed n;
    cin>>n;
    int ans = find_best(n);
    cout<<"Final answer: "<<ans<<endl;
}
11 12
0 1 3
0 2 4
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7
 */
/*
3 3
0 1 1
1 2 1
 */

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