oj.uz

Submission #443176

# Submission time Handle Problem Language Result Execution time Memory
443176 2021-07-10T02:48:09 Z penguinhacker Zamjene (COCI16_zamjene) C++14
84 / 140
 4438 ms 65256 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array
#define ull unsigned long long

const int mxN=1e6;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

struct Hsh {
	size_t operator()(ar<ull, 2> a) {
		return a[0]^a[1];
	};
};

int n, q, a[mxN], b[mxN], p[mxN], s[mxN], bad;
ull val[mxN], h1[mxN], h2[mxN];
map<ull, ll> mp;
ll ans;

int find(int i) {
	return i^p[i]?p[i]=find(p[i]):i;
}

void add(int u) {
	assert(p[u]==u);
	if (h1[u]^h2[u]) {
		++bad;
		mp[h1[u]-h2[u]]+=s[u];
		auto it=mp.find(h2[u]-h1[u]);
		if (it!=mp.end())
			ans+=s[u]*it->second;
	}
}

void rem(int u) {
	assert(p[u]==u);
	if (h1[u]^h2[u]) {
		--bad;
		auto it=mp.find(h1[u]-h2[u]);
		assert(it!=mp.end());
		if ((it->second-=s[u])==0)
			mp.erase(it);
		it=mp.find(h2[u]-h1[u]);
		if (it!=mp.end())
			ans-=s[u]*it->second;
	}
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> q;
	for (int i=0; i<n; ++i) {
		cin >> a[i], --a[i];
		b[i]=a[i];
	}
	sort(b, b+n);
	for (int i=0; i<mxN; ++i)
		val[i]=rng();
	for (int i=0; i<n; ++i) {
		p[i]=i, s[i]=1;
		h1[i]=val[a[i]];
		h2[i]=val[b[i]];
		add(i);
	}
	while(q--) {
		int t;
		cin >> t;
		if (t==1) {
			int x, y;
			cin >> x >> y, --x, --y;
			int u=find(x), v=find(y);
			if (u^v) {
				rem(u), rem(v);
				h1[u]-=val[a[x]], h1[v]-=val[a[y]];
				swap(a[x], a[y]);
				h1[u]+=val[a[x]], h1[v]+=val[a[y]];
				add(u), add(v);
			}
		} else if (t==2) {
			int x, y;
			cin >> x >> y, --x, --y;
			int u=find(x), v=find(y);
			if (u==v)
				continue;
			if (s[u]<s[v])
				swap(u, v);
			rem(u), rem(v);
			p[v]=u, s[u]+=s[v];
			h1[u]+=h1[v], h2[u]+=h2[v];
			add(u);
		} else if (t==3) {
			cout << (!bad?"DA":"NE") << "\n";
		} else {
			cout << ans << "\n";
		}
	}
	return 0;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 8140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 12 ms 8140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 8140 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 13 ms 8156 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 8140 KB Output is correct
2 Correct 13 ms 8116 KB Output is correct
3 Correct 13 ms 8140 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 8552 KB Output is correct
2 Correct 18 ms 8536 KB Output is correct
3 Correct 20 ms 8524 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 11608 KB Output is correct
2 Correct 98 ms 12100 KB Output is correct
3 Correct 156 ms 13020 KB Output is correct

Subtask #8
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 940 ms 28424 KB Output is correct
2 Correct 4026 ms 50900 KB Output is correct
3 Correct 4438 ms 57044 KB Output is correct

Subtask #9
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1746 ms 51368 KB Output is correct
2 Correct 3789 ms 65256 KB Output is correct
3 Correct 1588 ms 63044 KB Output is correct

Subtask #10
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 933 ms 44428 KB Output is correct
2 Correct 1944 ms 51756 KB Output is correct
3 Correct 1663 ms 63016 KB Output is correct