Submission #834738

#	Time	Username	Problem	Language	Result	Execution time	Memory
834738		Mohmad_Zaid	Keys (IOI21_keys)	C++17	0 / 100	1 ms	428 KiB

keys

#include <bits/stdc++.h>
#define pb push_back
using namespace std;

vector<bool>vis;
vector<vector<int>>g;

void dfs(int par,int node,vector<int>&r,vector<int>&u,vector<int>&v,vector<int>&c){
    vis[node]=1;
    for(auto it:g[node]){
        if(it==par || vis[it])continue;
        dfs(node,it,r,u,v,c);
    }
}
vector<int> find_reachable(vector<int> r, vector<int> u, vector<int> v, vector<int> c) {
	int n=r.size();
    int m=u.size();
    g.resize(n,vector<int>());
    for(int i=0;i<n;i++){
        g[u[i]].pb(v[i]);
        g[v[i]].pb(u[i]);
    }
    vector<int> ans(n, 1);
    vector<int>reaches(n,0);
    int mn=INT_MAX;
    for(int i=0;i<n;i++){
        vis.assign(n,0);
        if(r[i]!=0){reaches[i]=1;mn=1;continue;}
        dfs(-1,i,r,u,v,c);
        int sm=0;
        for(int j=0;j<n;j++){sm+=vis[j];}
        reaches[i]=sm;
    }
    for(int i=0;i<n;i++){
        mn=min(mn,reaches[i]);
    }
    for(int i=0;i<n;i++){
        if(reaches[i]==mn){
            ans[i]=1;
        }else{
            ans[i]=0;
        }
    }
}

Compilation message (stderr)

keys.cpp: In function 'std::vector<int> find_reachable(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
keys.cpp:17:9: warning: unused variable 'm' [-Wunused-variable]
   17 |     int m=u.size();
      |         ^
keys.cpp:44:1: warning: no return statement in function returning non-void [-Wreturn-type]
   44 | }
      | ^

• Subtask 1: 0 / 9
• Subtask 2: 0 / 11
• Subtask 3: 0 / 17
• Subtask 4: 0 / 30
• Subtask 5: 0 / 33