Submission #1111252

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1111252	2024-11-11 20:47:32	codexistent	Pipes (BOI13_pipes)	C++14	74.07 / 100	289 ms	131072 KiB

pipes

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#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define MAXN 100005
#define MAXM 500005
#define FOR(i, a, b) for(ll i = a; i <= b; i++)
#define f first
#define s second
ll n, m, t[MAXN], en[MAXN], r[MAXM];
pair<ll, ll> e[MAXM];
vector<pair<ll, ll>> adj[MAXN];
bool v[MAXN];
int main(){
    cin >> n >> m;
    FOR(i, 1, n) {
        cin >> t[i];
        en[i] = 0, v[i] = false;
    }
    FOR(i, 1, m){
        cin >> e[i].f >> e[i].s;
        adj[e[i].f].push_back({e[i].s, i}), en[e[i].f]++;
        adj[e[i].s].push_back({e[i].f, i}), en[e[i].s]++;
        r[i] = 1000000001;
    }
    if(!(m == n - 1 || m == n)) return cout << 0 << endl, 0;
    queue<ll> q;
    FOR(i, 1, n) if(en[i] == 1) q.push(i);
 
 
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Compilation message (stderr)

pipes.cpp: In function 'int main()':
pipes.cpp:78:60: warning: 'prvi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   78 |         for(pair<ll, ll> p : adj[sti]) if(e[p.s].f == prvi || e[p.s].s == prvi) {
      |                                           ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 30 / 30
• Subtask 2: 44.074074074074076 / 70