Submission #132075

#	Time	Username	Problem	Language	Result	Execution time	Memory
132075		MvC	Bridges (APIO19_bridges)	C++11	13 / 100	79 ms	14236 KiB

bridges

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include<bits/stdc++.h>
//#include "job.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e5+50;
const int mmax=1e3+50;
const int mod=1e9+7;
using namespace std;
int x,y,z,nr,vz[mmax],q,i,t,n,m;
vector<pair<pair<int,int>,int> >e;
vector<int>a[nmax];
void dfs(int x,int z)
{
	vz[x]=1;
	nr++;
	for(int i=0;i<a[x].size();i++)
	{
		int y=a[x][i],u=x^e[y].fr.fr^e[y].fr.sc;
		if(vz[u] || e[y].sc<z)continue;
		dfs(u,z);
	}
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m;
	for(i=1;i<=m;i++)
	{
		cin>>x>>y>>z;
		a[x].pb(i-1);
		a[y].pb(i-1);
		e.pb(mkp(mkp(x,y),z));
	}
	cin>>q;
	while(q--)
	{
		cin>>t>>x>>z;
		if(t==1)
		{
			x--;
			e[x].sc=z;
		}
		else
		{
			memset(vz,0,sizeof(vz));
			nr=0;
			dfs(x,z);
			cout<<nr<<'\n';
		}
	}
    return 0;
}

Compilation message (stderr)

bridges.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
bridges.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
bridges.cpp: In function 'void dfs(int, int)':
bridges.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<a[x].size();i++)
              ~^~~~~~~~~~~~

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