Submission #1310805

#	Time	Username	Problem	Language	Result	Execution time	Memory
1310805		georgeckito	Cave (IOI13_cave)	C++20	100 / 100	364 ms	640 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back

void exploreCave(int N){
    vector<int> S(N, -67);
    vector<int> d(N, -67);
    for(int o = 0; o < N; o++){
        vector<int> v;
        for(int i = 0; i < N; i++) if(S[i] < 0) v.pb(i);
        vector<int> fix(N);
        for(int i = 0; i < N; i++) fix[i] = (S[i] < 0 ? 0 : S[i]);

        int x = tryCombination(fix.data());
        int si = (x < 0 || x > o) ? 0 : 1;

        if(v.size() == 1){
            S[v[0]] = si;
            d[v[0]] = o;
            continue;
        }

        vector<int> vv = v;
        while(vv.size() > 1){
            int m = vv.size() / 2;
            vector<int> l(vv.begin(), vv.begin() + m);
            vector<int> r(vv.begin() + m, vv.end());
            for(int i = 0; i < N; i++) fix[i] = (S[i] < 0 ? 1 - si : S[i]);
            for(int idx : l) fix[idx] = si;
            int xx = tryCombination(fix.data());
            if(xx < 0 || xx > o) vv = l;
            else vv = r;
        }
        S[vv[0]] = si;
        d[vv[0]] = o;
    }
    vector<int> SSS = S, DDD = d;
    int St[N], Dt[N];
    for(int i = 0; i < N; i++){
        St[i] = SSS[i];
        Dt[i] = DDD[i];
    }
    answer(St, Dt);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24