Submission #977782

#	Time	Username	Problem	Language	Result	Execution time	Memory
977782		De3b0o	Bridges (APIO19_bridges)	C++14	13 / 100	114 ms	35484 KiB

bridges

#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
#define in insert
#define pb push_back
#define ppb pop_back()
#define d3 ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define cans cout << ans << "\n";
#define yes cout << "Yes" << "\n";
#define no cout << "No" << "\n";
#define pll pair<ll,ll>
#define lin cout << "\n";
#define sqr 340
#define mod 1000000007
#define mid ((l+r)/2)
#define lc (2*n)
#define rc (2*n+1)

using namespace std;

ll fp(ll x , ll y)
{
    if(y==0)
        return 1;
    ll z = fp(x,y/2);
    if(y&1)
        return z*z%mod*x%mod;
    else
        return z*z%mod;
}

int sqrot(ll x)
{
    int l = 0 , r = INT_MAX;
    while(l<=r)
    {
        if(mid*mid>=x)
            r=mid-1;
        else
            l=mid+1;
    }
    return r+1;
}

ll cel(ll x , ll y)
{
    return x/y + bool(x%y);
}

ll n , m;
multiset<pll> adj[50009];
bool vis[1009];
pll ed[100009];
ll val[100009];
ll ans;

void dfs(ll n , ll w)
{
    if(vis[n])
        return;
    vis[n]=1;
    ans++;
    for(auto it : adj[n])
    {
        if(it.S>=w)
            dfs(it.F,w);
    }
}

int main()
{
    d3
    cin >> n >> m;
    for(int i = 1 ; m>=i ; i++)
    {
        cin >> ed[i].F >> ed[i].S >> val[i];
        adj[ed[i].F].in({ed[i].S,val[i]});
        adj[ed[i].S].in({ed[i].F,val[i]});
    }
    ll q;
    cin >> q;
    while(q--)
    {
        ll t;
        cin >> t;
        if(t==1)
        {
            ll i , w;
            cin >> i >> w;
            adj[ed[i].F].erase(adj[ed[i].F].find({ed[i].S,val[i]}));
            adj[ed[i].S].erase(adj[ed[i].S].find({ed[i].F,val[i]}));
            val[i]=w;
            adj[ed[i].F].in({ed[i].S,val[i]});
            adj[ed[i].S].in({ed[i].F,val[i]});
        }
        else
        {
            ll idx , w;
            cin >> idx >> w;
            memset(vis,0,sizeof(vis));
            ans=0;
            dfs(idx,w);
            cans
        }
    }
}

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