제출 #690498

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
690498		hoangphat120805	다리 (APIO19_bridges)	C++14	13 / 100	50 ms	8036 KiB

bridges

#include <bits/stdc++.h>

using namespace std;
#define reu(i, a, b) for(int i = a, _b = b; i <= _b; ++i)
#define red(i, a, b) for(int i = a, _b = b; i >= _b; --i)
#define ii pair<int,int>
#define fi first
#define se second
#define pb push_back


typedef long long ll;
const int N = 5e4 + 5;

int n, m, q;
int b[N];
vector <ii> adj[N];
int visit[1005];
int bfs(int s, int w){
    memset(visit, 0, sizeof visit);
    int cnt = 1;
    visit[s] = 1;
    queue <int> q;
    q.push(s);
    while(q.size()){
        int u = q.front(); q.pop();

        for(ii x: adj[u]){
            int v = x.fi, id = x.se;
            if (b[id] >= w && visit[v] == 0){
                cnt++;
                visit[v] = 1;
                q.push(v);
            }
        }
    }
    return cnt;
}

void sub1()
{
    cin >> q;
    while(q--){
        int type;
        cin >> type;
        if (type == 1){
            int x, y;
            cin >> x >> y;
            b[x] = y;
        } else {
            int s, w;
            cin >> s >> w;
            cout << bfs(s, w) << '\n';
        }
    }
}
int32_t main()
{
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
//    freopen("TAITRONG.inp", "r", stdin);
//    freopen("TAITRONG.out", "w", stdout);
    cin >> n >> m;
    reu(i, 1, m){
        int u, v, d;
        cin >> u >> v >> b[i];
        adj[u].push_back({v, i});
        adj[v].push_back({u, i});
    }
    sub1();
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

bridges.cpp: In function 'int32_t main()':
bridges.cpp:64:19: warning: unused variable 'd' [-Wunused-variable]
   64 |         int u, v, d;
      |                   ^

• Subtask 1: 13 / 13
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27