Submission #578935

#	Time	Username	Problem	Language	Result	Execution time	Memory
578935		Belgutei	Cave (IOI13_cave)	C++17	51 / 100	106 ms	408 KiB

cave

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

using namespace std;

#define ll long long
#define ff first
#define ss second
#define pb push_back
#define mk make_pair

int l,r;
vector<int> v;
vector<int> :: iterator it;

void exploreCave(int N) {
    int x[N];
    int a[N];
    int tp[N];
    int ans[N];
    memset(a, 0, sizeof(a));
    //
    for(int i = 0; i < N; i ++) {
        v.pb(i);
    }
    //
    memset(tp, -1, sizeof(tp));
    //
    for(int i = 0; i < N; i ++) {
        l = 0;
        r = v.size() - 1;
        while(l < r) {
            int tur = tryCombination(a);
            if(tur == -1) tur = N;
            int mid = (l + r) / 2;
            // cout << l << ' ' << r << ' ' << mid << '\n';
            // cout << tur << ": ";
            // for(int j = 0; j < N; j ++) {
            //     cout << a[j] << ' ';
            // }
            // cout << '\n';
            for(int j = l; j <= mid; j ++) {
                a[v[j]] = 1 - a[v[j]];
            }
            int tmp = tryCombination(a);
            if(tmp == -1) tmp = N;
            // cout << tmp << ": ";
            // for(int j = 0; j < N; j ++) {
            //     cout << a[j] << ' '; 
            // }
            // cout << '\n';
            if(tur <= i && tmp > i) {
                r = mid;
            }
            else if(tur <= i && tmp <= i) {
                l = mid + 1;
            }
            else if(tur > i && tmp <= i) {
                r = mid;
            }
            else l = mid + 1;
            //cout << l << ' ' << r << '\n';
        }
        ans[v[l]] = i;
        int tur = tryCombination(a);
        if(tur == -1) tur = N;
        if(tur > i) {
            tp[v[l]] = a[v[l]];
        }
        else {
            a[v[l]] = 1 - a[v[l]];
            tp[v[l]] = a[v[l]];
        }
        it = lower_bound(v.begin(), v.end(), v[l]);
        v.erase(it);
    }
    answer(tp, ans);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:17:9: warning: unused variable 'x' [-Wunused-variable]
   17 |     int x[N];
      |         ^

• Subtask 1: 0 / 12
• Subtask 2: 0 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 0 / 24