Submission #131050

#	Time	Username	Problem	Language	Result	Execution time	Memory
131050		claudy	Bridges (APIO19_bridges)	C++14	44 / 100	3038 ms	13948 KiB

bridges

# pragma GCC optimize("Ofast,no-stack-protector")
# pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
# pragma GCC optimize("Ofast")
# pragma GCC optimization ("unroll-loops")
# include "bits/stdc++.h"
/*
# include <ext/pb_ds/tree_policy.hpp>
# include <ext/pb_ds/assoc_container.hpp>
# include <ext/rope>
*/
std::pair<int,int> DR[] = {{-1,0},{0,1},{1,0},{0,-1},{-1,1},{-1,-1},{1,1},{1,-1}};
# define ll long long
# define clock (clock() * 1000.0 / CLOCKS_PER_SEC)
# define rc(s) return cout << s,0
# define rcg(s) cout << s;exit(0)
# define _ ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
# define db(x) cerr << #x << " = " << x << '\n'
# define pb push_back
# define mp make_pair
# define all(s) s.begin(),s.end()
# define sz(x) (int)((x).size())
//# define int ll
using namespace std;
 
/*
using namespace __gnu_pbds;
using namespace __gnu_cxx;
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag,tree_order_statistics_node_update>;
Tree<int>tr;
*/
 
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# define LOCAL
# define sim template < class c
# define ris return * this
# define dor > debug & operator <<
# define eni(x) sim > typename \
enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return rge<c>{i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
*this << "[";
for (auto it = d.b; it != d.e; ++it)
*this << ", " + 2 * (it == d.b) << *it;
ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define show(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "
int gcd(int a, int b)
{
if(b) return gcd(b,a%b);
return a;
}mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
int n,m,u[1 << 17],v[1 << 17],d[1 << 17],a[1 << 17],b[1 << 17],c[1 << 17],q,sze[1 << 17],p[1 << 17],ans[1 << 17];
vector<int>vec[1 << 17];
vector<int>qry[1 << 17];
bitset<100005>used,viz,afk;

const int L = 600;
 
 
inline int find(int x)
{
	if(x == p[x]) return x;
	return p[x] = find(p[x]);
}
 
inline void unite(int a,int b)
{
	a = find(a);
	b = find(b);
	if(a != b)
	{
		if(sze[a] > sze[b]) swap(a,b);
		p[a] = b;
		sze[b] += sze[a];
	}
}
 
int dfs(int nod)
{
	viz[nod] = 1;
	int x = sze[nod];
	for(auto it : vec[nod])
	{
		if(!viz[it]) x += dfs(it);
	}
	return x;
}
 
int32_t main(){_
	//freopen("input","r",stdin);
	cin >> n >> m;
	for(int i = 1;i <= m;i++)
	{
		cin >> u[i] >> v[i] >> d[i];
	}
	cin >> q;
	for(int i = 0;i < q;i++)
	{
		cin >> a[i] >> b[i] >> c[i];
	}
	vector<pair<int,int>>st;
	for(int i = 1;i <= m;i++)
	{
		st.pb(mp(-d[i],i));
	}
	st.pb(mp(0,0));
	for(int i = 0;i < q;i += L)
	{
		sort(st.begin(),st.end());
		for(int j = 1;j <= n;j++) p[j] = j,sze[j] = 1;
		for(int j = 0;j <= m;j++) qry[j].clear();
		for(int j = i;j < min(q,i + L);j++)
		{
			if(a[j] == 1)
			{
				afk[b[j]] = 1;
			}
		}
		for(int j = i;j < min(q,i + L);j++)
		{
			if(a[j] == 2)
			{
				auto it = upper_bound(st.begin(),st.end(),mp(-c[j],2000000000));
				qry[(*it).second].pb(j);
			}
		}
		vector<pair<int,int>>myvec;
		for(auto IT : st)
		{
			int idx = IT.second;
			for(auto it : qry[idx])
			{
				vector<int>temp;
				vector<int>kek;
				used.reset();viz.reset();
				for(int j = it - 1;j >= i;--j)
				{
					if(a[j] == 1 && !used[b[j]])
					{
						used[b[j]] = 1;
						if(c[j] >= c[it])
						{
							int x = find(u[b[j]]);
							int y = find(v[b[j]]);
							if(x != y)
							{
								vec[x].push_back(y);
								vec[y].push_back(x);
								temp.pb(x);
								temp.pb(y);
							}
						}
					}
				}
				for(int j = it + 1;j < min(q,i + L);++j)
				{
					if(a[j] == 1 && !used[b[j]])
					{
						used[b[j]] = 1;
						if(d[b[j]] >= c[it])
						{
							int x = find(u[b[j]]);
							int y = find(v[b[j]]);
							if(x != y)
							{
								vec[x].pb(y);
								vec[y].pb(x);
								temp.pb(x);
								temp.pb(y);
							}
						}
					}
				}
				ans[it] = dfs(find(b[it]));
				for(auto itit : temp) vec[itit].clear();		
			}
			if(!afk[idx])
			{
				if(idx) unite(u[idx],v[idx]);
				myvec.pb(IT);
			}
		}
		used.reset();
		for(int j = min(q,i + L - 1);j >= i;j--)
		{
			if(a[j] == 1 && !used[b[j]])
			{
				d[b[j]] = c[j];
				used[b[j]] = 1;
				afk[b[j]] = 0;
				myvec.pb(mp(-d[b[j]],b[j]));
			}
		}
		st = myvec;
	}
	for(int i = 0;i < q;i++)
	{
		if(a[i] == 2) 
		{
			cout << max(1,ans[i]) << '\n';
		}
	}
	return 0;
}
 
 
 
 
 

Compilation message (stderr)

bridges.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 # pragma GCC optimization ("unroll-loops")

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