Submission #400070

#	Time	Username	Problem	Language	Result	Execution time	Memory
400070		teehandsome	Bridges (APIO19_bridges)	C++17	0 / 100	80 ms	97880 KiB

bridges

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define endl '\n'
#define INF 1e9+7
#define all(x) x.begin(),x.end()
using namespace std;
using namespace __gnu_pbds;
using ll=long long;
using pii=pair<int,int>;
using ppi=pair<int,pii>;
using oset=tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;

template<typename T>
void _print(vector<T> x) {cerr<<"{"; for(auto e:x) cerr<<e<<","; cerr<<"}";}
void _print(pii x) {cerr<<"{"<<x.first<<","<<x.second<<"}";}
template<typename T>
void _print(T x) {cerr<<x;}

void dbg() {cerr<<endl;}
template<typename Head,typename... Tail>
void dbg(Head H,Tail... T) {
    _print(H);
    if(sizeof...(T)) cerr<<",";
    else cerr<<"\"]";
    dbg(T...);
}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:[\"",dbg(__VA_ARGS__)

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n,m,q;
multiset<int,greater<int>> adj[1010][1010];
ppi idx[1010];

int solve(int s,int mx) {
    vector<bool> flag(n+1,false);
    queue<int> q;
    q.push(s);
    while(!q.empty()) {
        int u=q.front(); q.pop();
        flag[u]=true;
        for(int i=1;i<=n;i++) {
            int U=u,V=i;
            if(U>V) swap(U,V);
            if(flag[i] or adj[U][V].empty()) continue;
//            if(*adj[U][V].begin()<mx) continue;
            flag[i]=true;
            q.push(i);
        }
    }
    int ans=0;
    for(int i=1;i<=n;i++) {
        if(flag[i]) ans++;
    }
    return ans;
}

int main () {
    ios::sync_with_stdio(false); cin.tie(0);
    cin>>n>>m;
//    assert(n<=1000 and m<=1000);
    for(int i=1;i<=m;i++) {
        int u,v,w; cin>>u>>v>>w;
        if(u>v) swap(u,v);
        adj[u][v].insert(w);
        idx[i]={w,{u,v}};
    }
    int q; cin>>q;
    while(q--) {
        int t,x,y; cin>>t>>x>>y;
        if(t==1) {
            ppi temp=idx[x];
            int u=temp.second.first;
            int v=temp.second.second;
            int w=temp.first;
            if(u>v) swap(u,v);
            adj[u][v].erase(adj[u][v].find(w));
            adj[u][v].insert(y);
            temp.first=y;
        }
        else {
            cout<<solve(x,y)<<endl;
        }
    }
}

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