Submission #234703

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
234703	2020-05-25T09:54:46 Z	anonymous	Chameleon's Love (JOI20_chameleon)	C++14	Compilation error	0 ms	0 KB

chameleon

#include "chameleon.h"
#include <vector>
#include <cassert>
#include <iostream>
#define MAXN 1005
using namespace std;
vector <int> adj[MAXN];
vector <int> M, F;
int Num, Love[MAXN], vis[MAXN], Done[MAXN];

voidfindEdge(int i, vector<int> IS) {
    IS.push_back(i);
    if (Num == 3 || IS.size() == 1 || Query(IS) == IS.size()) {return(0);}
    if (IS.size() == 2) {
        adj[i].push_back(IS[0]);
        adj[IS[0]].push_back(i);
        Num++;
    } 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]);}
        }
        findEdge(i, L);
        findEdge(i, R);
    }
}

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

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

void Solve(int N) {
    for (int i=1; i<=2*N; i++) {
        Num = 0;
        bipartite(i);
        findEdge(i, M);
        findEdge(i, F);
    }
    for (int i=1; i<=2*N; i++) {
        assert(adj[i].size() == 1 || adj[i].size() == 3);
        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 (Query(Ask) == 1) {
                Love[i] = adj[i][j];
                break;
            }
        }
    }
    bipartite(2*N+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:11:35: error: ISO C++ forbids declaration of 'voidfindEdge' with no type [-fpermissive]
 voidfindEdge(int i, vector<int> IS) {
                                   ^
chameleon.cpp: In function 'int voidfindEdge(int, std::vector<int>)':
chameleon.cpp:13:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (Num == 3 || IS.size() == 1 || Query(IS) == IS.size()) {return(0);}
                                       ~~~~~~~~~~^~~~~~~~~~~~
chameleon.cpp:22:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i=0; i < IS.size(); i++) {
                       ~~^~~~~~~~~~~
chameleon.cpp:26:9: error: 'findEdge' was not declared in this scope
         findEdge(i, L);
         ^~~~~~~~
chameleon.cpp:26:9: note: suggested alternative: 'voidfindEdge'
         findEdge(i, L);
         ^~~~~~~~
         voidfindEdge
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:52:9: error: 'findEdge' was not declared in this scope
         findEdge(i, M);
         ^~~~~~~~
chameleon.cpp:52:9: note: suggested alternative: 'voidfindEdge'
         findEdge(i, M);
         ^~~~~~~~
         voidfindEdge
chameleon.cpp: In function 'int voidfindEdge(int, std::vector<int>)':
chameleon.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^