Submission #529820

#	Time	Username	Problem	Language	Result	Execution time	Memory
529820		ammar2000	Bridges (APIO19_bridges)	C++17	13 / 100	3071 ms	16244 KiB

bridges

#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define coy cout<<"YES\n"
#define con cout<<"NO\n"
#define co1 cout<<"-1\n"
#define sc(x) scanf("%lld",&x)
#define all(x) x.begin(),x.end()
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
const int SI=3e5+7;
ll INF=8e18+7;
int dx[] = {1 , -1 , 0 , 0};
int dy[] = {0 , 0 , 1 , -1};
int MOD=1e9+7;
ll q,n,m,p[SI],vis[SI],col;
vector <pair < ll ,ll> > v[SI];
ll dfs(int node,int ma)
{
    vis[node]=col;
    ll ret =1;
    for (auto i:v[node])
    {
        if (vis[i.F]!=col&&p[i.S]>=ma)
            ret+=dfs(i.F,ma);
    }
    return ret;
}
int main()
{
   fast
   cin>>n>>m;
   for (int i=1;i<=m;i++)
   {
       ll x,y,w;
       cin>>x>>y>>w;
       p[i]=w;
       v[x].pb({y,i});
       v[y].pb({x,i});
   }
   cin>>q;
   while (q--)
   {
       ll t,a,b;
       cin>>t>>a>>b;
       if (t==1)
       {
           p[a]=b;
           continue ;
       }
       col++;
       cout << dfs(a,b)<<"\n";
   }
   // use scanf not cin
   return 0;
}

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