oj.uz

Submission #722650

# Submission time Handle Problem Language Result Execution time Memory
722650 2023-04-12T14:01:38 Z gagik_2007 Joker (BOI20_joker) C++17
14 / 100
 2000 ms 42064 KB 
#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <chrono>
#include <ctime>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <limits>
#include <iomanip>
#include <unordered_set>
#include <unordered_map>
#include <fstream>
#include <functional>
#include <random>
#include <cassert>
using namespace std;

typedef long long ll;
typedef long double ld;

#define ff first
#define ss second

struct Query {
	int l;
	int r;
	int ind;
	ll ans;
	Query(int _l, int _r, int _ind) :l(_l), r(_r), ind(_ind), ans(0) {}
};

struct Edge {
	int x;
	int y;
	Edge(int _x, int _y) :x(_x), y(_y) {}
};

ll ttt;
const ll INF = 1e18;
const ll MOD = 1e9 + 7;
const ll N = 200007;
const ll LG = 31;
ll n, m, k;
set<int>g[N];
vector<Query>q;
vector<Edge>e;
int used[N];

bool dfs(int v) {
	for (int to : g[v]) {
		if (used[to] == used[v]) {
			return true;
		}
		else if (!used[to]) {
			used[to] = 3 - used[v];
			if (dfs(to)) {
				return true;
			}
		}
	}
	return false;
}

bool is_odd_cycle() {
	for (int i = 1; i <= n; i++) {
		used[i] = 0;
	}
	for (int i = 1; i <= n; i++) {
		if (!used[i]) {
			used[i] = 1;
			if (dfs(i)) {
				return true;
			}
		}
	}
	return false;
}

void remove_edges(const Query& query) {
	for (int i = query.l; i <= query.r; i++) {
		g[e[i].x].erase(e[i].y);
		g[e[i].y].erase(e[i].x);
	}
}

void add_edges(const Query& query) {
	for (int i = query.l; i <= query.r; i++) {
		g[e[i].x].insert(e[i].y);
		g[e[i].y].insert(e[i].x);
	}
}

bool do_query(const Query& query) {
	remove_edges(query);
	bool res = is_odd_cycle();
	add_edges(query);
	return res;
}

void only_l_equals_one() {
	// finding the first number i for which do_query(Query(0, i)) == false
	int l = 0, r = m + 1;
	while (l < r) {
		int mid = (l + r) / 2;
		if (do_query(Query(0, mid, 0))) {
			l = mid + 1;
		}
		else {
			r = mid;
		}
	}
	for (int i = 0; i < k; i++) {
		if (q[i].r >= l) {
			cout << "NO\n";
		}
		else cout << "YES\n";
	}
}

int main() {
	//freopen("in.txt", "r", stdin);
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n >> m >> k;
	for (int i = 0; i < m; i++) {
		int x, y;
		cin >> x >> y;
		g[x].insert(y);
		g[y].insert(x);
		e.push_back(Edge(x, y));
	}
	bool only1 = true;
	for (int i = 0; i < k; i++) {
		int l, r;
		cin >> l >> r;
		l--, r--;
		if (l != 0)only1 = false;
		q.push_back(Query(l, r, i));
	}
	if (n <= 2000 && m <= 2000 && k <= 2000) {
		for (int i = 0; i < k; i++) {
			if (do_query(q[i])) {
				cout << "YES\n";
			}
			else {
				cout << "NO\n";
			}
		}
	}
	else if (only1) {
		only_l_equals_one();
	}
}

/// ---- - --------  ------ -------- -- - - -
/// Just a reminder. Ubuntu password is I O I
/// ---- - --------  ------ -------- -- - - -

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9812 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 7 ms 9684 KB Output is correct
9 Correct 8 ms 9684 KB Output is correct
10 Correct 8 ms 9684 KB Output is correct
11 Correct 8 ms 9684 KB Output is correct
12 Correct 8 ms 9760 KB Output is correct
13 Correct 7 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9684 KB Output is correct
16 Correct 8 ms 9684 KB Output is correct
17 Correct 9 ms 9756 KB Output is correct
18 Correct 8 ms 9756 KB Output is correct
19 Correct 8 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 6 ms 9684 KB Output is correct
23 Correct 9 ms 9684 KB Output is correct
24 Correct 9 ms 9684 KB Output is correct
25 Correct 9 ms 9684 KB Output is correct
26 Correct 18 ms 9752 KB Output is correct
27 Correct 10 ms 9684 KB Output is correct
28 Correct 9 ms 9684 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9812 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 7 ms 9684 KB Output is correct
9 Correct 8 ms 9684 KB Output is correct
10 Correct 8 ms 9684 KB Output is correct
11 Correct 8 ms 9684 KB Output is correct
12 Correct 8 ms 9760 KB Output is correct
13 Correct 7 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9684 KB Output is correct
16 Correct 8 ms 9684 KB Output is correct
17 Correct 9 ms 9756 KB Output is correct
18 Correct 8 ms 9756 KB Output is correct
19 Correct 8 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 6 ms 9684 KB Output is correct
23 Correct 9 ms 9684 KB Output is correct
24 Correct 9 ms 9684 KB Output is correct
25 Correct 9 ms 9684 KB Output is correct
26 Correct 18 ms 9752 KB Output is correct
27 Correct 10 ms 9684 KB Output is correct
28 Correct 9 ms 9684 KB Output is correct
29 Correct 93 ms 9812 KB Output is correct
30 Correct 321 ms 10124 KB Output is correct
31 Correct 356 ms 10008 KB Output is correct
32 Correct 428 ms 10008 KB Output is correct
33 Correct 460 ms 10028 KB Output is correct
34 Correct 347 ms 10020 KB Output is correct
35 Correct 353 ms 10016 KB Output is correct
36 Correct 402 ms 10164 KB Output is correct
37 Correct 237 ms 10032 KB Output is correct
38 Correct 200 ms 9912 KB Output is correct
39 Correct 344 ms 9940 KB Output is correct
40 Correct 402 ms 10024 KB Output is correct
41 Correct 399 ms 10012 KB Output is correct
42 Correct 383 ms 10020 KB Output is correct
43 Correct 86 ms 10016 KB Output is correct
44 Correct 88 ms 10156 KB Output is correct
45 Correct 88 ms 10012 KB Output is correct
46 Correct 74 ms 9940 KB Output is correct
47 Correct 440 ms 10064 KB Output is correct
48 Correct 392 ms 9940 KB Output is correct
49 Correct 399 ms 10132 KB Output is correct
50 Correct 341 ms 10068 KB Output is correct
51 Correct 450 ms 10040 KB Output is correct
52 Correct 432 ms 10016 KB Output is correct
53 Correct 405 ms 10148 KB Output is correct
54 Correct 313 ms 9940 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 802 ms 40548 KB Output is correct
4 Correct 649 ms 39364 KB Output is correct
5 Correct 1225 ms 41904 KB Output is correct
6 Correct 1418 ms 42064 KB Output is correct
7 Correct 1522 ms 41296 KB Output is correct
8 Execution timed out 2027 ms 41292 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9812 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 7 ms 9684 KB Output is correct
9 Correct 8 ms 9684 KB Output is correct
10 Correct 8 ms 9684 KB Output is correct
11 Correct 8 ms 9684 KB Output is correct
12 Correct 8 ms 9760 KB Output is correct
13 Correct 7 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9684 KB Output is correct
16 Correct 8 ms 9684 KB Output is correct
17 Correct 9 ms 9756 KB Output is correct
18 Correct 8 ms 9756 KB Output is correct
19 Correct 8 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 6 ms 9684 KB Output is correct
23 Correct 9 ms 9684 KB Output is correct
24 Correct 9 ms 9684 KB Output is correct
25 Correct 9 ms 9684 KB Output is correct
26 Correct 18 ms 9752 KB Output is correct
27 Correct 10 ms 9684 KB Output is correct
28 Correct 9 ms 9684 KB Output is correct
29 Correct 802 ms 40548 KB Output is correct
30 Correct 649 ms 39364 KB Output is correct
31 Correct 1225 ms 41904 KB Output is correct
32 Correct 1418 ms 42064 KB Output is correct
33 Correct 1522 ms 41296 KB Output is correct
34 Execution timed out 2027 ms 41292 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9812 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 7 ms 9684 KB Output is correct
9 Correct 8 ms 9684 KB Output is correct
10 Correct 8 ms 9684 KB Output is correct
11 Correct 8 ms 9684 KB Output is correct
12 Correct 8 ms 9760 KB Output is correct
13 Correct 7 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9684 KB Output is correct
16 Correct 8 ms 9684 KB Output is correct
17 Correct 9 ms 9756 KB Output is correct
18 Correct 8 ms 9756 KB Output is correct
19 Correct 8 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 6 ms 9684 KB Output is correct
23 Correct 9 ms 9684 KB Output is correct
24 Correct 9 ms 9684 KB Output is correct
25 Correct 9 ms 9684 KB Output is correct
26 Correct 18 ms 9752 KB Output is correct
27 Correct 10 ms 9684 KB Output is correct
28 Correct 9 ms 9684 KB Output is correct
29 Correct 93 ms 9812 KB Output is correct
30 Correct 321 ms 10124 KB Output is correct
31 Correct 356 ms 10008 KB Output is correct
32 Correct 428 ms 10008 KB Output is correct
33 Correct 460 ms 10028 KB Output is correct
34 Correct 347 ms 10020 KB Output is correct
35 Correct 353 ms 10016 KB Output is correct
36 Correct 402 ms 10164 KB Output is correct
37 Correct 237 ms 10032 KB Output is correct
38 Correct 200 ms 9912 KB Output is correct
39 Correct 344 ms 9940 KB Output is correct
40 Correct 402 ms 10024 KB Output is correct
41 Correct 399 ms 10012 KB Output is correct
42 Correct 383 ms 10020 KB Output is correct
43 Correct 86 ms 10016 KB Output is correct
44 Correct 88 ms 10156 KB Output is correct
45 Correct 88 ms 10012 KB Output is correct
46 Correct 74 ms 9940 KB Output is correct
47 Correct 440 ms 10064 KB Output is correct
48 Correct 392 ms 9940 KB Output is correct
49 Correct 399 ms 10132 KB Output is correct
50 Correct 341 ms 10068 KB Output is correct
51 Correct 450 ms 10040 KB Output is correct
52 Correct 432 ms 10016 KB Output is correct
53 Correct 405 ms 10148 KB Output is correct
54 Correct 313 ms 9940 KB Output is correct
55 Incorrect 111 ms 30112 KB Output isn't correct
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 5 ms 9812 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9684 KB Output is correct
6 Correct 5 ms 9684 KB Output is correct
7 Correct 5 ms 9684 KB Output is correct
8 Correct 7 ms 9684 KB Output is correct
9 Correct 8 ms 9684 KB Output is correct
10 Correct 8 ms 9684 KB Output is correct
11 Correct 8 ms 9684 KB Output is correct
12 Correct 8 ms 9760 KB Output is correct
13 Correct 7 ms 9684 KB Output is correct
14 Correct 6 ms 9684 KB Output is correct
15 Correct 7 ms 9684 KB Output is correct
16 Correct 8 ms 9684 KB Output is correct
17 Correct 9 ms 9756 KB Output is correct
18 Correct 8 ms 9756 KB Output is correct
19 Correct 8 ms 9684 KB Output is correct
20 Correct 6 ms 9684 KB Output is correct
21 Correct 6 ms 9684 KB Output is correct
22 Correct 6 ms 9684 KB Output is correct
23 Correct 9 ms 9684 KB Output is correct
24 Correct 9 ms 9684 KB Output is correct
25 Correct 9 ms 9684 KB Output is correct
26 Correct 18 ms 9752 KB Output is correct
27 Correct 10 ms 9684 KB Output is correct
28 Correct 9 ms 9684 KB Output is correct
29 Correct 93 ms 9812 KB Output is correct
30 Correct 321 ms 10124 KB Output is correct
31 Correct 356 ms 10008 KB Output is correct
32 Correct 428 ms 10008 KB Output is correct
33 Correct 460 ms 10028 KB Output is correct
34 Correct 347 ms 10020 KB Output is correct
35 Correct 353 ms 10016 KB Output is correct
36 Correct 402 ms 10164 KB Output is correct
37 Correct 237 ms 10032 KB Output is correct
38 Correct 200 ms 9912 KB Output is correct
39 Correct 344 ms 9940 KB Output is correct
40 Correct 402 ms 10024 KB Output is correct
41 Correct 399 ms 10012 KB Output is correct
42 Correct 383 ms 10020 KB Output is correct
43 Correct 86 ms 10016 KB Output is correct
44 Correct 88 ms 10156 KB Output is correct
45 Correct 88 ms 10012 KB Output is correct
46 Correct 74 ms 9940 KB Output is correct
47 Correct 440 ms 10064 KB Output is correct
48 Correct 392 ms 9940 KB Output is correct
49 Correct 399 ms 10132 KB Output is correct
50 Correct 341 ms 10068 KB Output is correct
51 Correct 450 ms 10040 KB Output is correct
52 Correct 432 ms 10016 KB Output is correct
53 Correct 405 ms 10148 KB Output is correct
54 Correct 313 ms 9940 KB Output is correct
55 Correct 802 ms 40548 KB Output is correct
56 Correct 649 ms 39364 KB Output is correct
57 Correct 1225 ms 41904 KB Output is correct
58 Correct 1418 ms 42064 KB Output is correct
59 Correct 1522 ms 41296 KB Output is correct
60 Execution timed out 2027 ms 41292 KB Time limit exceeded
61 Halted 0 ms 0 KB -