Submission #835607

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
835607	2023-08-23T16:36:00 Z	Mohmad_Zaid	Keys (IOI21_keys)	C++17	Compilation error	0 ms	0 KB

keys

#include <bits/stdc++.h>
#define pb push_back
using namespace std;
vector<int> find_reachable(vector<int>& r, vector<int>& u, vector<int>& v, vector<int>& c) {
    int n=r.size();
    int m=u.size();
	vector<int> final(n, 1);
    vector<vector<vector<int>>>g(n,vector<vector<int>>(n,vector<int>()));
    vector<int>last_visit(n);
    vector<int>sizes(n,0);
    vector<bool>vis(n);
    set<int>keys;
    for(int i=0;i<m;i++){
        g[u[i]][c[i]].pb(v[i]);
        g[v[i]][c[i]].pb(u[i]);
    }
    int mn=INT_MAX;
    for(int i=0;i<n;i++){
        last_visit.assign(n,0);
        keys.clear();vis.assign(n,0);
        vis[i]=1;
        queue<int>q;
        q.push(i);
        while(!q.empty()){
            int par=q.front();
            keys.insert(r[par]);
            q.pop();
            for(auto key:keys){
                for(int to:g[par][key]){
                    if(keys.size()==last_visit[to])continue;
                    else{
                        last_visit[to]=keys.size();
                        vis[to]=1;
                        q.push(to);
                    }
                }
            }
            // if(!ok)break;
        }
        for(int j=0;j<n;j++)sizes[i]+=vis[j];
        mn=min(mn,sizes[i]);
    }
    for(int i=0;i<n;i++){
        // cout<<"room: "<<i<<' '<<sizes[i]<<endl;
        if(sizes[i]==mn)final[i]=1;
        else final[i]=0;
    }
    return final;
}
// int main(){
//     vector<int>test;
//     vector<int>r={0, 1, 1, 2, 2, 1, 2},u={0, 0, 1, 1, 2, 3, 3, 4, 4, 5},
//     v={1, 2, 2, 3, 3, 4, 5, 5, 6, 6},c={0, 0, 1, 0, 0, 1, 2, 0, 2, 1};
//     test=find_reachable(r,u,v,c);
//     for(int i=0;i<test.size();i++)cout<<test[i]<<' ';cout<<endl;
//     return 0;
// }

Compilation message

keys.cpp: In function 'std::vector<int> find_reachable(std::vector<int>&, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
keys.cpp:30:35: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
   30 |                     if(keys.size()==last_visit[to])continue;
/usr/bin/ld: /tmp/ccIMapIu.o: in function `main':
grader.cpp:(.text.startup+0x30a): undefined reference to `find_reachable(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status