oj.uz

Submission #235462

# Submission time Handle Problem Language Result Execution time Memory
235462 2020-05-28T10:26:45 Z anonymous Chameleon's Love (JOI20_chameleon) C++14
100 / 100
 52 ms 512 KB 
#include "chameleon.h"
#include <vector>
#define MAXN 1005
using namespace std;
vector <int> adj[MAXN];
vector <int> M, F;
int Num, Love[MAXN], vis[MAXN];

bool findEdge(int i, vector<int> IS, bool b) {
    IS.push_back(i);
    if (Num == 3 || IS.size() == 1 || (!b && Query(IS) == IS.size())) {return(false);}
    if (IS.size() == 2) {
        adj[i].push_back(IS[0]);
        adj[IS[0]].push_back(i);
        Num++;
        return(true);
    } else {
        IS.pop_back();
        vector <int> L, R;
        int mid = (IS.size() - 1)/2;
        for (int i=0; i < IS.size(); i++) {
            if (i <= mid) {L.push_back(IS[i]);}
            else {R.push_back(IS[i]);}
        }
        if (!findEdge(i, L, 0)) {
            findEdge(i, R, 1);
        } else {
            findEdge(i, R, 0);
        }
        return(true);
    }
}

void dfs(int u, int t, bool c, bool k) {
    vis[u] = t;
    if (c && (adj[u].size() != 3 || k)) {M.push_back(u);}
    else if (adj[u].size() != 3 || k) {F.push_back(u);}
    for (int v: adj[u]) {
        if (vis[v] != t) {dfs(v, t, c^1,k);}
    }
}

void bipartite(int t, bool k) {
    M.clear();
    F.clear();
    for (int i=1; i<t; i++) {
        if (vis[i] != t) {dfs(i,t,0,k);}
    }
}

void Solve(int N) {
    for (int i=1; i<=2*N; i++) {
        Num = 0;
        bipartite(i,0);
        findEdge(i, M, 0);
        findEdge(i, F, 0);
    }
    for (int i=1; i<=2*N; i++) {
        if (adj[i].size() != 3) {
            if (adj[i][0] > i || adj[adj[i][0]].size() == 3) {Answer(i, adj[i][0]);}
            continue;
        }
        for (int j=0; j<3; j++) {
            vector <int> Ask;
            Ask.push_back(i);
            for (int k=0; k<3; k++) {
                if (j != k) {Ask.push_back(adj[i][k]);}
            }
            if (j == 2 || Query(Ask) == 1) {
                Love[i] = adj[i][j];
                break;
            }
        }
    }
    bipartite(2*N+1, 1);
    for (int f: F) {
        for (int m: adj[f]) {
            if (Love[m] != f && Love[f] != m && adj[f].size() == 3 && adj[m].size() == 3) {
                Answer(f,m);
            }
        }
    }
}

Compilation message

chameleon.cpp: In function 'bool findEdge(int, std::vector<int>, bool)':
chameleon.cpp:11:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (Num == 3 || IS.size() == 1 || (!b && Query(IS) == IS.size())) {return(false);}
                                              ~~~~~~~~~~^~~~~~~~~~~~
chameleon.cpp:21:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i=0; i < IS.size(); i++) {
                       ~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 31 ms 384 KB Output is correct
4 Correct 32 ms 384 KB Output is correct
5 Correct 31 ms 384 KB Output is correct
6 Correct 31 ms 384 KB Output is correct
7 Correct 31 ms 384 KB Output is correct
8 Correct 41 ms 512 KB Output is correct
9 Correct 40 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 4 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 5 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 52 ms 480 KB Output is correct
4 Correct 48 ms 384 KB Output is correct
5 Correct 47 ms 504 KB Output is correct
6 Correct 47 ms 504 KB Output is correct
7 Correct 46 ms 384 KB Output is correct
8 Correct 47 ms 384 KB Output is correct
9 Correct 48 ms 512 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 31 ms 384 KB Output is correct
4 Correct 32 ms 384 KB Output is correct
5 Correct 31 ms 384 KB Output is correct
6 Correct 31 ms 384 KB Output is correct
7 Correct 31 ms 384 KB Output is correct
8 Correct 41 ms 512 KB Output is correct
9 Correct 40 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 384 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 4 ms 384 KB Output is correct
17 Correct 4 ms 384 KB Output is correct
18 Correct 4 ms 384 KB Output is correct
19 Correct 5 ms 512 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 4 ms 384 KB Output is correct
29 Correct 4 ms 384 KB Output is correct
30 Correct 52 ms 480 KB Output is correct
31 Correct 48 ms 384 KB Output is correct
32 Correct 47 ms 504 KB Output is correct
33 Correct 47 ms 504 KB Output is correct
34 Correct 46 ms 384 KB Output is correct
35 Correct 47 ms 384 KB Output is correct
36 Correct 48 ms 512 KB Output is correct
37 Correct 45 ms 384 KB Output is correct
38 Correct 32 ms 512 KB Output is correct
39 Correct 46 ms 384 KB Output is correct
40 Correct 47 ms 384 KB Output is correct
41 Correct 46 ms 448 KB Output is correct
42 Correct 32 ms 432 KB Output is correct
43 Correct 47 ms 504 KB Output is correct
44 Correct 46 ms 384 KB Output is correct
45 Correct 45 ms 504 KB Output is correct