Submission #128254

#	Time	Username	Problem	Language	Result	Execution time	Memory
128254		claudy	Bridges (APIO19_bridges)	C++14	13 / 100	3053 ms	2000 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"
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;

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# 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,q,p[1 << 17],sze[1 << 17],ans[1 << 17];
int a[1 << 17],b[1 << 17],c[1 << 17];

int find(int x)
{
	if(p[x] == x) return x;
	return p[x] = find(p[x]);
}

void unite(int a,int b)
{
	a = find(a);
	b = find(b);
	if(a == b) return ;
	if(sze[a] > sze[b]) swap(a,b);
	p[a] = b;
	sze[b] += sze[a];
}

int32_t main(){_
	//freopen("input","r",stdin);
	cin >> n >> m;
	for(int i = 1;i <= m;i++)
	{
		cin >> a[i] >> b[i] >> c[i];
	}
	cin >> q;
	while(q--)
	{
		int t,x,y;
		cin >> t >> x >> y;
		if(t == 1) c[x] = y;
		else
		{
			for(int i = 1;i <= n;i++)
			{
				p[i] = i;
				sze[i] = 1;
			}
			for(int i = 1;i <= m;i++)
			{
				if(c[i] >= y)
				{
					unite(a[i],b[i]);
				}
			}
			cout << sze[find(x)] << '\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: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27