oj.uz

Submission #925891

# Submission time Handle Problem Language Result Execution time Memory
925891 2024-02-12T10:25:30 Z vjudge1 Joker (BOI20_joker) C++17
36 / 100
 1726 ms 15572 KB 
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")

#include<bits/stdc++.h>	

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()                 
#define sz(a) (int)a.size()
#define s second
#define f first
 
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
     
vector<pii> rid = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
vector<pii> dir = {{-1, -1}, {-1, 1}, {1, -1}, {1, 1}};
 
const int N = 4e5 + 1, mod = 998244353;

const ll inf = 1e9;
 
double eps = 1e-15;
                                                
bool flg = 0;

const int k = 1000;

bool ok = 1, was[N];
vector<pii> g(N);

int p[N + 1], pr[N];
int sz[N + 1], pt[N + 1];
vector<array<int, 2>> h;

pii get(int x) {
 	if (p[x] == x) return {x, 0};
 	pii val = get(p[x]);
 	return {val.f, (pr[x] + val.s) % 2};
}

void add(int id) {
	int u = g[id].f;
	int v = g[id].s;
	pii x = get(u);
	pii y = get(v);
	if (x.f == y.f) {
		if (x.s == y.s) {
			if (ok) {
			    h.push_back({-1, -1});
				ok = 0;
			}    
		}
		return;
	}
	if (sz[x.f] > sz[y.f]) swap(x, y);
	h.push_back({x.f, sz[x.f]});
	h.push_back({y.f, sz[y.f]});
	p[x.f] = y.f;
	pr[x.f] = (x.s + y.s + 1) % 2;  	
	sz[y.f] += sz[x.f];
}

void rb() {
	while (sz(h) && !pt[sz(h)]) {
		array<int, 2> x = h.back();
		h.pop_back();
		if (x[0] == -1) {
			ok = 1;
			continue;
		}
		p[x[0]] = x[0];
		pr[x[0]] = 0;
		sz[x[0]] = x[1];
	}
	pt[sz(h)] = 0; 
}

bool slave(int l, int r) {
	for (int i = l; i <= r; i++) add(i);
	bool vv = ok;
	rb();
	return vv;	
}

bool cmp(array<int, 3> a, array<int, 3> b) {
	if (a[0] / k < b[0] / k) return 1;
	if (a[0] / k == b[0] / k && a[1] < b[1]) return 1;
	return 0;
}

void slv() {
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 1; i <= m; i++) {
		int u, v;
		cin >> u >> v;
		g[i] = g[i + m] = {u, v};
	}
	for (int i = 1; i <= n; i++) 
		p[i] = i, sz[i] = 1;
	if (q > 2000) {
		vector<pii> qr;
		bool ans[q + 1];
		for (int i = 1; i <= q; i++) {
			int l, r;
			cin >> l >> r;
			qr.push_back({r, i});
		}
		sort(all(qr));
		int p = 0;
		for (auto [r, id]: qr) {
			while (p < r) 
				add(++p);
		   	ans[id] = ok;
		}
		for (int i = 1; i <= q; i++) {
			if (ans[i]) cout << "NO\n";
			else cout << "YES\n";
		}
		return;
	}
	vector<array<int, 3>> qr;
	bool ans[q + 1];
	for (int i = 1; i <= q; i++) {
		int l, r;
		cin >> l >> r;
		int tl = r + 1, tr = l + m - 1;
		if (tl / k == tr / k) 
			ans[i] = slave(tl, tr);
		else qr.push_back({tl, tr, i});
	}
	sort(all(qr), cmp);
	int tr = 0, lst = -1, pos;
	for (auto [l, r, id]: qr) {
		if (l / k != lst) {
			rb();
			lst = l / k;
			pos = (lst + 1) * k - 1;
			tr = pos;
		}
		while (tr < r) 
			add(++tr);
		pt[sz(h)] = 1;
		for (int i = pos; i >= l; i--) 
			add(i);
		ans[id] = ok;
		rb();
		
	}
	for (int i = 1; i <= q; i++) {
		if (ans[i]) cout << "NO\n";
		else cout << "YES\n";
	}
}                                                                           
 
main() {
	//freopen("rsq.in", "r", stdin);                                                                                     
	//freopen("rsq.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(0);	                                                                                       
	cin.tie(0);
	int tp = 1;
	if (flg) cin >> tp;
	while (tp--) {  	
		slv();
	}
}
//wenomechainsama

Compilation message

Joker.cpp:161:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  161 | main() {
      | ^~~~
Joker.cpp: In function 'void slv()':
Joker.cpp:149:3: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
  149 |   for (int i = pos; i >= l; i--)
      |   ^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 3 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 3 ms 9564 KB Output is correct
11 Correct 3 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9564 KB Output is correct
14 Correct 3 ms 9532 KB Output is correct
15 Correct 3 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 3 ms 9564 KB Output is correct
19 Correct 3 ms 9564 KB Output is correct
20 Correct 3 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9560 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 3 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 3 ms 9564 KB Output is correct
11 Correct 3 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9564 KB Output is correct
14 Correct 3 ms 9532 KB Output is correct
15 Correct 3 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 3 ms 9564 KB Output is correct
19 Correct 3 ms 9564 KB Output is correct
20 Correct 3 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9560 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Correct 20 ms 9816 KB Output is correct
30 Correct 19 ms 9820 KB Output is correct
31 Correct 27 ms 9820 KB Output is correct
32 Correct 25 ms 9820 KB Output is correct
33 Correct 21 ms 9820 KB Output is correct
34 Correct 14 ms 9820 KB Output is correct
35 Correct 29 ms 9820 KB Output is correct
36 Correct 5 ms 9816 KB Output is correct
37 Correct 30 ms 9888 KB Output is correct
38 Correct 20 ms 9872 KB Output is correct
39 Correct 18 ms 9820 KB Output is correct
40 Correct 6 ms 10076 KB Output is correct
41 Correct 6 ms 9820 KB Output is correct
42 Correct 6 ms 9840 KB Output is correct
43 Correct 12 ms 9820 KB Output is correct
44 Correct 13 ms 9820 KB Output is correct
45 Correct 16 ms 9816 KB Output is correct
46 Correct 18 ms 9820 KB Output is correct
47 Correct 17 ms 9820 KB Output is correct
48 Correct 21 ms 9816 KB Output is correct
49 Correct 25 ms 9820 KB Output is correct
50 Correct 25 ms 9820 KB Output is correct
51 Correct 22 ms 9820 KB Output is correct
52 Correct 23 ms 9820 KB Output is correct
53 Correct 25 ms 9820 KB Output is correct
54 Correct 28 ms 9876 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Incorrect 69 ms 14476 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 3 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 3 ms 9564 KB Output is correct
11 Correct 3 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9564 KB Output is correct
14 Correct 3 ms 9532 KB Output is correct
15 Correct 3 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 3 ms 9564 KB Output is correct
19 Correct 3 ms 9564 KB Output is correct
20 Correct 3 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9560 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Incorrect 69 ms 14476 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #5
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 3 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 3 ms 9564 KB Output is correct
11 Correct 3 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9564 KB Output is correct
14 Correct 3 ms 9532 KB Output is correct
15 Correct 3 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 3 ms 9564 KB Output is correct
19 Correct 3 ms 9564 KB Output is correct
20 Correct 3 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9560 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Correct 20 ms 9816 KB Output is correct
30 Correct 19 ms 9820 KB Output is correct
31 Correct 27 ms 9820 KB Output is correct
32 Correct 25 ms 9820 KB Output is correct
33 Correct 21 ms 9820 KB Output is correct
34 Correct 14 ms 9820 KB Output is correct
35 Correct 29 ms 9820 KB Output is correct
36 Correct 5 ms 9816 KB Output is correct
37 Correct 30 ms 9888 KB Output is correct
38 Correct 20 ms 9872 KB Output is correct
39 Correct 18 ms 9820 KB Output is correct
40 Correct 6 ms 10076 KB Output is correct
41 Correct 6 ms 9820 KB Output is correct
42 Correct 6 ms 9840 KB Output is correct
43 Correct 12 ms 9820 KB Output is correct
44 Correct 13 ms 9820 KB Output is correct
45 Correct 16 ms 9816 KB Output is correct
46 Correct 18 ms 9820 KB Output is correct
47 Correct 17 ms 9820 KB Output is correct
48 Correct 21 ms 9816 KB Output is correct
49 Correct 25 ms 9820 KB Output is correct
50 Correct 25 ms 9820 KB Output is correct
51 Correct 22 ms 9820 KB Output is correct
52 Correct 23 ms 9820 KB Output is correct
53 Correct 25 ms 9820 KB Output is correct
54 Correct 28 ms 9876 KB Output is correct
55 Correct 555 ms 12004 KB Output is correct
56 Correct 1080 ms 15568 KB Output is correct
57 Correct 787 ms 14296 KB Output is correct
58 Correct 704 ms 11740 KB Output is correct
59 Correct 1581 ms 11736 KB Output is correct
60 Correct 1726 ms 14040 KB Output is correct
61 Correct 948 ms 11916 KB Output is correct
62 Correct 1029 ms 15572 KB Output is correct
63 Correct 923 ms 10716 KB Output is correct
64 Correct 1156 ms 12000 KB Output is correct
65 Correct 1161 ms 15316 KB Output is correct

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 9564 KB Output is correct
4 Correct 2 ms 9564 KB Output is correct
5 Correct 2 ms 9564 KB Output is correct
6 Correct 2 ms 9564 KB Output is correct
7 Correct 2 ms 9564 KB Output is correct
8 Correct 3 ms 9564 KB Output is correct
9 Correct 2 ms 9564 KB Output is correct
10 Correct 3 ms 9564 KB Output is correct
11 Correct 3 ms 9564 KB Output is correct
12 Correct 2 ms 9564 KB Output is correct
13 Correct 3 ms 9564 KB Output is correct
14 Correct 3 ms 9532 KB Output is correct
15 Correct 3 ms 9564 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 2 ms 9560 KB Output is correct
18 Correct 3 ms 9564 KB Output is correct
19 Correct 3 ms 9564 KB Output is correct
20 Correct 3 ms 9564 KB Output is correct
21 Correct 3 ms 9564 KB Output is correct
22 Correct 3 ms 9564 KB Output is correct
23 Correct 3 ms 9564 KB Output is correct
24 Correct 2 ms 9564 KB Output is correct
25 Correct 3 ms 9564 KB Output is correct
26 Correct 2 ms 9560 KB Output is correct
27 Correct 2 ms 9560 KB Output is correct
28 Correct 3 ms 9564 KB Output is correct
29 Correct 20 ms 9816 KB Output is correct
30 Correct 19 ms 9820 KB Output is correct
31 Correct 27 ms 9820 KB Output is correct
32 Correct 25 ms 9820 KB Output is correct
33 Correct 21 ms 9820 KB Output is correct
34 Correct 14 ms 9820 KB Output is correct
35 Correct 29 ms 9820 KB Output is correct
36 Correct 5 ms 9816 KB Output is correct
37 Correct 30 ms 9888 KB Output is correct
38 Correct 20 ms 9872 KB Output is correct
39 Correct 18 ms 9820 KB Output is correct
40 Correct 6 ms 10076 KB Output is correct
41 Correct 6 ms 9820 KB Output is correct
42 Correct 6 ms 9840 KB Output is correct
43 Correct 12 ms 9820 KB Output is correct
44 Correct 13 ms 9820 KB Output is correct
45 Correct 16 ms 9816 KB Output is correct
46 Correct 18 ms 9820 KB Output is correct
47 Correct 17 ms 9820 KB Output is correct
48 Correct 21 ms 9816 KB Output is correct
49 Correct 25 ms 9820 KB Output is correct
50 Correct 25 ms 9820 KB Output is correct
51 Correct 22 ms 9820 KB Output is correct
52 Correct 23 ms 9820 KB Output is correct
53 Correct 25 ms 9820 KB Output is correct
54 Correct 28 ms 9876 KB Output is correct
55 Incorrect 69 ms 14476 KB Output isn't correct
56 Halted 0 ms 0 KB -