Submission #974660

#	Time	Username	Problem	Language	Result	Execution time	Memory
974660		raul2008487	Paths (BOI18_paths)	C++17	23 / 100	3064 ms	18852 KiB

paths

#include <bits/stdc++.h>

// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>

#define ll long long
#define pb push_back
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define all(v) v.begin(), v.end()
#define bpc(x) __builtin_popcount(x)
#define endl "\n"

using namespace std;
const int sz = 3e5 + 5; /// mind the sz
const ll inf = 1e18;
// using namespace __gnu_pbds;
// tree <ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> rbt;
ll n, m, k, c, a[sz], ans;
vl e[sz];
void dfs(ll node){
    c |= ( 1 << a[node] );
    for(auto edge: e[node]){
        if(c & (1 << a[edge])){continue;}
        ans++;
        dfs(edge);
    }
    c ^= (1 << a[node] );
}
void solve(){
    ll i, j, u, v;
    cin >> n >> m >> k;
    for(i = 1; i <= n; i++){
        cin >> a[i];
    }
    for(i = 1; i <= m; i++){
        cin >> u >> v;
        e[u].pb(v);
        e[v].pb(u);
    }
    for(i = 1; i <= n; i++){
        dfs(i);
    }
    cout << ans << endl;

}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
}
/*
*/

Compilation message (stderr)

paths.cpp: In function 'void solve()':
paths.cpp:33:11: warning: unused variable 'j' [-Wunused-variable]
   33 |     ll i, j, u, v;
      |           ^

• Subtask 1: 23 / 23
• Subtask 2: 0 / 20
• Subtask 3: 0 / 27
• Subtask 4: 0 / 30