oj.uz

Submission #215892

# Submission time Handle Problem Language Result Execution time Memory
215892 2020-03-26T12:12:00 Z BThero Chameleon's Love (JOI20_chameleon) C++17
100 / 100
 69 ms 572 KB 
#define DBG 1
// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>
#include "chameleon.h"
//#include<ext/pb_ds/tree_policy.hpp>
//#include<ext/pb_ds/assoc_container.hpp>

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) if (DBG) cerr << #x << " = " << x << endl;

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;
typedef pair<int, int> pii;

//template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

namespace {
    const int MAXN = 1005;
    vector<int> adj[MAXN];
    int partner[MAXN], loves[MAXN], n;  
    int col[MAXN];  
    
    void addEdge(int u, int v, bool check = 0) {
        if (check && Query({u, v}) != 1) {
            return;
        }
        
        adj[u].pb(v);
        adj[v].pb(u);
    }
    
    void dfs(int v) {
        for (int to : adj[v]) {
            if (col[to] == -1) {
                col[to] = 1 - col[v];
                dfs(to);
            }
            else if (col[to] == col[v]) {
                assert(0);
            }
        }
    }
}

void Solve(int _n) {
    n = _n;
    
    for (int i = 1; i <= 2 * n; ++i) {
        for (int j = 1; j < i; ++j) {
            col[j] = -1;
        }
        
        vector<vector<int>> vec(2);
        
        for (int j = 1; j < i; ++j) {
            if (col[j] == -1) {
                col[j] = 0;
                dfs(j);
            }
            
            vec[col[j]].pb(j);
        }
    
        for (vector<int> v : vec) {
            vector<int> tmp = v;
            tmp.pb(i);
        
            while (Query(tmp) != tmp.size()) {
                int l = 0;
                int r = (int)v.size() - 1;
                int p = -1;
                
                while (l <= r) {
                    int mid = (l + r) >> 1;
                    tmp = {i};
                    
                    for (int j = 0; j <= mid; ++j) {
                        tmp.pb(v[j]);
                    }
                    
                    if (Query(tmp) == tmp.size()) {
                        l = mid + 1;
                    }
                    else {
                        r = mid - 1;
                        p = mid;
                    }
                }
                
                addEdge(i, v[p], 1);
                tmp = vector<int>(v.begin() + p + 1, v.end());
                v = tmp;
                tmp.pb(i);
            }
        }
    }
    
    for (int i = 1; i <= 2 * n; ++i) {
        assert(adj[i].size() == 1 || adj[i].size() == 3);
        
        if (adj[i].size() == 1) {
            partner[i] = adj[i][0];
            continue;
        }
        
        while (Query({i, adj[i][0], adj[i][1]}) != 1) {
            rotate(adj[i].begin(), adj[i].begin() + 1, adj[i].end());
        }
        
        loves[i] = adj[i][2];
    }
    
    for (int i = 1; i <= 2 * n; ++i) {
        if (loves[adj[i][0]] == i) {
            partner[i] = adj[i][1];
        }
        else {
            partner[i] = adj[i][0];
        }
    }
    
    for (int i = 1; i <= 2 * n; ++i) {
        if (i < partner[i]) {
            Answer(i, partner[i]);
        }
    }
}

Compilation message

chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:75:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             while (Query(tmp) != tmp.size()) {
                    ~~~~~~~~~~~^~~~~~~~~~~~~
chameleon.cpp:88:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                     if (Query(tmp) == tmp.size()) {
                         ~~~~~~~~~~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 42 ms 384 KB Output is correct
4 Correct 42 ms 572 KB Output is correct
5 Correct 42 ms 520 KB Output is correct
6 Correct 42 ms 384 KB Output is correct
7 Correct 42 ms 452 KB Output is correct
8 Correct 42 ms 384 KB Output is correct
9 Correct 43 ms 384 KB Output is correct

Subtask #2
20.0 / 20.0

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

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 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 69 ms 384 KB Output is correct
4 Correct 66 ms 384 KB Output is correct
5 Correct 67 ms 384 KB Output is correct
6 Correct 67 ms 384 KB Output is correct
7 Correct 66 ms 384 KB Output is correct
8 Correct 67 ms 512 KB Output is correct
9 Correct 66 ms 504 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 42 ms 384 KB Output is correct
4 Correct 42 ms 572 KB Output is correct
5 Correct 42 ms 520 KB Output is correct
6 Correct 42 ms 384 KB Output is correct
7 Correct 42 ms 452 KB Output is correct
8 Correct 42 ms 384 KB Output is correct
9 Correct 43 ms 384 KB Output is correct
10 Correct 5 ms 384 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
19 Correct 5 ms 384 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 69 ms 384 KB Output is correct
31 Correct 66 ms 384 KB Output is correct
32 Correct 67 ms 384 KB Output is correct
33 Correct 67 ms 384 KB Output is correct
34 Correct 66 ms 384 KB Output is correct
35 Correct 67 ms 512 KB Output is correct
36 Correct 66 ms 504 KB Output is correct
37 Correct 66 ms 504 KB Output is correct
38 Correct 41 ms 448 KB Output is correct
39 Correct 65 ms 384 KB Output is correct
40 Correct 65 ms 384 KB Output is correct
41 Correct 65 ms 504 KB Output is correct
42 Correct 42 ms 384 KB Output is correct
43 Correct 67 ms 504 KB Output is correct
44 Correct 67 ms 504 KB Output is correct
45 Correct 66 ms 480 KB Output is correct