oj.uz

Submission #108655

# Submission time Handle Problem Language Result Execution time Memory
108655 2019-04-30T13:28:06 Z someone_aa Library (JOI18_library) C++17
19 / 100
 557 ms 616 KB 
#include <cstdio>
#include <vector>
#include "library.h"
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
using namespace std;
const int maxn = 1500;
vector<int>adj[maxn];
vector<int>M;
int n;


int preQuery(vector<int>M) {
    int br = 0;
    for(int i:M) {
        if(i == 1) br++;
    }

    if(br == 0) return 0;
    else return Query(M);
}

int find_neighbour(int x, int l=1, int r=n) {
    if(l > r) return -1;

    if(l == r) {
        // check if X is connected to L or not

        M[l-1] = M[x-1] = 1;
        int curr = preQuery(M);
        M[l-1] = M[x-1] = 0;

        if(curr == 1) return l;
        else return -1;
    }

    int mid = (l + r) /2;
    for(int i=l-1;i<=mid-1;i++) {
        M[i] = 1;
    }

    for(int i:adj[x]) {
        M[i-1] = 0;
    }

    M[x-1] = 0;

    int Without = preQuery(M);
    M[x-1] = 1;
    int With = preQuery(M);
    M[x-1] = 0;

    for(int i=l-1;i<=mid-1;i++) {
        M[i] = 0;
    }

    if(With == Without) {
        return find_neighbour(x, l, mid);
    }
    else if(With < Without) {
        return find_neighbour(x, l, mid);
    }
    else {
        return find_neighbour(x, mid+1, r);
    }
}

void Solve(int N) {
    n = N;
	for(int i=0;i<N;i++) {
		M.pb(0);
	}

	if(N == 1) {
        vector<int>v;
        v.pb(1);
        Answer(v);
        return;
	}

	int st = 1;
    bool check = false;
    int br = 0;
    for(int i=0;i<N;i++) {
        int X;
        if(st == 1) {
            if(br == 0) {
                X = find_neighbour(st);
                br++;
            }
            else if(br == 1) {
                X = find_neighbour(st);
                br++;
            }
            else {
                break;
            }
        }
        else {
            X = find_neighbour(st);
        }

        if(X == -1) {
            // st is on corner
            if(st == 1) {
                break;
            }
            else {
                st = 1;
            }
        }
        else {
            adj[st].pb(X);
            adj[X].pb(st);
            st = X;
        }
    }

    for(int i=1;i<=N;i++) {
        if(adj[i].size() == 0) {
            return;
        }
    }

    /*for(int i=1;i<=n;i++) {
        cout<<i<<": \n";
        for(int j:adj[i]) {
            cout<<j<<" ";
        } cout<<"\n";
    }*/


    st = 1;
    bool found = false;
    for(int i=1;i<=N;i++) {
        if(adj[i].size() == 1) {
            st = i;
            found = true;
            break;
        }
    }

    if(!found) {
        return;
    }

    vector<int>v;
    v.pb(st);
    st = adj[st][0];
    for(int i=0;i<N-1;i++) {
        if(adj[st][0] == v.back()) {
            v.pb(st);
            st = adj[st][1];
        }
        else {
            v.pb(st);
            st = adj[st][0];
        }
    }
    Answer(v);
}

Compilation message

library.cpp: In function 'void Solve(int)':
library.cpp:83:10: warning: unused variable 'check' [-Wunused-variable]
     bool check = false;
          ^~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 424 KB # of queries: 3134
2 Correct 28 ms 352 KB # of queries: 3115
3 Correct 40 ms 348 KB # of queries: 3286
4 Correct 82 ms 348 KB # of queries: 3286
5 Correct 55 ms 352 KB # of queries: 3284
6 Correct 53 ms 348 KB # of queries: 3286
7 Correct 60 ms 384 KB # of queries: 3286
8 Correct 33 ms 436 KB # of queries: 3152
9 Correct 52 ms 384 KB # of queries: 3267
10 Correct 42 ms 256 KB # of queries: 1935
11 Correct 2 ms 256 KB # of queries: 0
12 Correct 2 ms 256 KB # of queries: 4
13 Correct 2 ms 256 KB # of queries: 8
14 Correct 3 ms 384 KB # of queries: 18
15 Correct 7 ms 512 KB # of queries: 130
16 Correct 6 ms 384 KB # of queries: 285

Subtask #2
0 / 81.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 424 KB # of queries: 3134
2 Correct 28 ms 352 KB # of queries: 3115
3 Correct 40 ms 348 KB # of queries: 3286
4 Correct 82 ms 348 KB # of queries: 3286
5 Correct 55 ms 352 KB # of queries: 3284
6 Correct 53 ms 348 KB # of queries: 3286
7 Correct 60 ms 384 KB # of queries: 3286
8 Correct 33 ms 436 KB # of queries: 3152
9 Correct 52 ms 384 KB # of queries: 3267
10 Correct 42 ms 256 KB # of queries: 1935
11 Correct 2 ms 256 KB # of queries: 0
12 Correct 2 ms 256 KB # of queries: 4
13 Correct 2 ms 256 KB # of queries: 8
14 Correct 3 ms 384 KB # of queries: 18
15 Correct 7 ms 512 KB # of queries: 130
16 Correct 6 ms 384 KB # of queries: 285
17 Incorrect 557 ms 492 KB Wrong Answer [3]
18 Incorrect 468 ms 484 KB Wrong Answer [3]
19 Incorrect 490 ms 504 KB Wrong Answer [3]
20 Correct 499 ms 360 KB # of queries: 19614
21 Correct 494 ms 488 KB # of queries: 18489
22 Incorrect 485 ms 384 KB Wrong Answer [3]
23 Incorrect 416 ms 612 KB Wrong Answer [3]
24 Correct 173 ms 256 KB # of queries: 9747
25 Incorrect 463 ms 376 KB Wrong Answer [3]
26 Correct 423 ms 616 KB # of queries: 19178
27 Correct 124 ms 372 KB # of queries: 9705
28 Incorrect 464 ms 384 KB Wrong Answer [3]
29 Incorrect 452 ms 384 KB Wrong Answer [3]
30 Incorrect 473 ms 484 KB Wrong Answer [3]