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Submission #448592

# Submission time Handle Problem Language Result Execution time Memory
448592 2021-07-31T01:24:32 Z JooDdae Chameleon's Love (JOI20_chameleon) C++17
100 / 100
 163 ms 656 KB 
#include "chameleon.h"
#include <bits/stdc++.h>
using namespace std;

int nxt[1010];
bool chk[1010];
vector<int> v[1010];

void addEdge(int a, int b){
    v[a].push_back(b), v[b].push_back(a);
}

int find_next(const int u, const vector<int> &q){
    if(q.empty() || v[u].size() == 3) return 0;

    vector<int> Q2(1, u);
    for(auto x : q) Q2.push_back(x);
    if(Query(Q2) == Q2.size()) return 0;

    int L = 0, R = q.size()-1;
    while(L <= R){
        int M = (L+R)/2;

        vector<int> Q(1, u);
        for(int i=0;i<=M;i++) Q.push_back(q[i]);

        if(Query(Q) == Q.size()) L = M+1;
        else R = M-1;
    }

    if(L == q.size()) return 0;

    addEdge(u, q[R+1]);
    return q[R+1];
}

void compress(set<int> &s){
    for(auto it = s.begin(); it != s.end(); ){
        if(v[*it].size() == 3) it = s.erase(it);
        else it = next(it);
    }
}

void Solve(int N) {
    set<int> s1, s2;

    for(int i=1;i<=2*N;i++){
        compress(s1), compress(s2);
        vector<int> q1(s1.begin(), s1.end()), q2(s2.begin(), s2.end());

        int k = 0;
        while(k = find_next(i, q1)){
            while(!q1.empty() && *q1.begin() <= k) q1.erase(q1.begin());
        }
        while(k = find_next(i, q2)){
            while(!q2.empty() && *q2.begin() <= k) q2.erase(q2.begin());
        }

        vector<int> chk2(2*N+1), g, b;
        queue<pair<int, int>> q; chk2[i] = 1; q.push({i, 0});
        while(!q.empty()){
            auto [u, c] = q.front(); q.pop();
            if(s1.count(u)) s1.erase(u);
            if(s2.count(u)) s2.erase(u);
            (c ? b : g).push_back(u);
            for(auto x : v[u]) if(!chk2[x]) chk2[x] = 1, q.push({x, !c});
        }

        for(auto x : g) s1.insert(x);
        for(auto x : b) s2.insert(x);
    }

    // for(int i=1;i<=2*N;i++){
    //     printf("[%d] :",i);
    //     for(int x : v[i]) printf(" %d",x);
    //     puts("");
    // }
    // ---------------------------------------- don't touch line -----------------------------------------


    for(int i=1;i<=2*N;i++) if(!chk[i])
        {if(v[i].size() == 1){
            chk[i] = chk[v[i][0]] = 1, Answer(i, v[i][0]);
            continue;
        }

        int &A = v[i][0], &B = v[i][1], &C = v[i][2];
        if(Query({i, B, C}) == 1) swap(A, C);
        else if(Query({i, A, C}) == 1) swap(B, C);
        nxt[i] = C, v[i].pop_back();
    }

    for(int i=1;i<=2*N;i++) if(!chk[i]){
        int x = (chk[v[i][1]] || nxt[v[i][1]] == i ? v[i][0] : v[i][1]);
        chk[i] = chk[x] = 1, Answer(i, x);
    }
}

Compilation message

chameleon.cpp: In function 'int find_next(int, const std::vector<int>&)':
chameleon.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     if(Query(Q2) == Q2.size()) return 0;
      |        ~~~~~~~~~~^~~~~~~~~~~~
chameleon.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         if(Query(Q) == Q.size()) L = M+1;
      |            ~~~~~~~~~^~~~~~~~~~~
chameleon.cpp:31:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     if(L == q.size()) return 0;
      |        ~~^~~~~~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:52:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   52 |         while(k = find_next(i, q1)){
      |               ~~^~~~~~~~~~~~~~~~~~
chameleon.cpp:55:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   55 |         while(k = find_next(i, q2)){
      |               ~~^~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 51 ms 328 KB Output is correct
4 Correct 50 ms 328 KB Output is correct
5 Correct 51 ms 396 KB Output is correct
6 Correct 51 ms 416 KB Output is correct
7 Correct 51 ms 396 KB Output is correct
8 Correct 50 ms 420 KB Output is correct
9 Correct 50 ms 400 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 0 ms 328 KB Output is correct
5 Correct 0 ms 328 KB Output is correct
6 Correct 0 ms 328 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 268 KB Output is correct
9 Correct 0 ms 328 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 0 ms 328 KB Output is correct
5 Correct 0 ms 328 KB Output is correct
6 Correct 0 ms 328 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 268 KB Output is correct
9 Correct 0 ms 328 KB Output is correct
10 Correct 2 ms 328 KB Output is correct
11 Correct 1 ms 328 KB Output is correct
12 Correct 2 ms 328 KB Output is correct
13 Correct 2 ms 328 KB Output is correct
14 Correct 2 ms 328 KB Output is correct
15 Correct 1 ms 328 KB Output is correct
16 Correct 2 ms 328 KB Output is correct
17 Correct 2 ms 328 KB Output is correct
18 Correct 2 ms 328 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 0 ms 328 KB Output is correct
3 Correct 131 ms 420 KB Output is correct
4 Correct 131 ms 408 KB Output is correct
5 Correct 128 ms 420 KB Output is correct
6 Correct 131 ms 412 KB Output is correct
7 Correct 132 ms 656 KB Output is correct
8 Correct 130 ms 404 KB Output is correct
9 Correct 133 ms 440 KB Output is correct

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 328 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 51 ms 328 KB Output is correct
4 Correct 50 ms 328 KB Output is correct
5 Correct 51 ms 396 KB Output is correct
6 Correct 51 ms 416 KB Output is correct
7 Correct 51 ms 396 KB Output is correct
8 Correct 50 ms 420 KB Output is correct
9 Correct 50 ms 400 KB Output is correct
10 Correct 0 ms 328 KB Output is correct
11 Correct 0 ms 328 KB Output is correct
12 Correct 0 ms 328 KB Output is correct
13 Correct 0 ms 328 KB Output is correct
14 Correct 0 ms 328 KB Output is correct
15 Correct 0 ms 328 KB Output is correct
16 Correct 1 ms 328 KB Output is correct
17 Correct 1 ms 268 KB Output is correct
18 Correct 0 ms 328 KB Output is correct
19 Correct 2 ms 328 KB Output is correct
20 Correct 1 ms 328 KB Output is correct
21 Correct 2 ms 328 KB Output is correct
22 Correct 2 ms 328 KB Output is correct
23 Correct 2 ms 328 KB Output is correct
24 Correct 1 ms 328 KB Output is correct
25 Correct 2 ms 328 KB Output is correct
26 Correct 2 ms 328 KB Output is correct
27 Correct 2 ms 328 KB Output is correct
28 Correct 0 ms 328 KB Output is correct
29 Correct 0 ms 328 KB Output is correct
30 Correct 131 ms 420 KB Output is correct
31 Correct 131 ms 408 KB Output is correct
32 Correct 128 ms 420 KB Output is correct
33 Correct 131 ms 412 KB Output is correct
34 Correct 132 ms 656 KB Output is correct
35 Correct 130 ms 404 KB Output is correct
36 Correct 133 ms 440 KB Output is correct
37 Correct 158 ms 560 KB Output is correct
38 Correct 50 ms 404 KB Output is correct
39 Correct 161 ms 328 KB Output is correct
40 Correct 161 ms 416 KB Output is correct
41 Correct 163 ms 448 KB Output is correct
42 Correct 51 ms 328 KB Output is correct
43 Correct 133 ms 560 KB Output is correct
44 Correct 161 ms 432 KB Output is correct
45 Correct 158 ms 412 KB Output is correct