oj.uz

Submission #470588

# Submission time Handle Problem Language Result Execution time Memory
470588 2021-09-04T12:36:16 Z cp_is_hard Joker (BOI20_joker) C++14
14 / 100
 2000 ms 21828 KB 
#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define all(x) x.begin(), x.end()
#define ceil(a, b)

using namespace std;

#define INF 1000000000000000000
#define lld long double
#define int long long int
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else 
#define print(...)
#define vprint(...)
#endif
namespace dsu {
	int n, cnt;
	vector<int> sz, par;
	stack<pair<int*, int>> st;
	void init_(int _n) {
		n = _n, cnt = 0;
		sz.assign(n + 1, 0);
		par.assign(n + 1, 0);
		rep(i, 1, n) 
			sz[i] = 1, par[i] = i;
	}
	int find_par(int a) {
		while(a != par[a]) a = par[a];
		return a;
	}
	bool same(int a, int b) {
		return find_par(a) == find_par(b);
	}
	void unite(int a, int b) {
		int aa = find_par(a);
		int bb = find_par(b);
		if(aa == bb) return;
		if(sz[aa] < sz[bb]) swap(aa, bb);
		cnt++;
		st.push({&par[bb], par[bb]});
		st.push({&sz[aa], sz[aa]});
		par[bb] = aa, sz[aa] += sz[bb];
	}
	void undo() {
		if(!cnt) return;
		cnt--;
		pair<int*, int> p;
		p = st.top();
		st.pop(), *p.first = p.second;
		p = st.top();
		st.pop(), *p.first = p.second;
	}
};
namespace solver {
	int n, m;
	vector<int> s;
	vector<pii> es;
	void init_(int _n, int _m) {
		n = _n, m = _m;
		s.assign(2 * m, 0);
		es.assign(2 * m, {0, 0});
		dsu::init_(2 * n);
	}
	void solve(int L, int R, int l, int r) {
		int mid = (L + R) / 2, id = max(l, mid);
		if(L > R) return;
		int p1 = dsu::cnt;
		rep(i, mid, min(R, id - 1)) {
			dsu::unite(es[i].first, es[i].second + n);
			dsu::unite(es[i].first + n, es[i].second);
		} 
		int p2 = dsu::cnt;
		while(id < r) {
			int x = es[id].first, y = es[id].second;
			if(dsu::same(x, y)) break;
			dsu::unite(x, y + n);
			dsu::unite(x + n, y);
			id ++;
		}
		s[mid] = id;
		while(dsu::cnt != p2) dsu::undo();
		solve(L, mid - 1, l, id);
		while(dsu::cnt != p1) dsu::undo();
		rep(i, R + 1, id - 1) {
			dsu::unite(es[i].first, es[i].second + n);
			dsu::unite(es[i].first + n, es[i].second);
		} 
		solve(mid + 1, R, id, r);
		while(dsu::cnt != p1) dsu::undo();
		return;
	}
	bool query(int L, int R) {
		L --, R --;
		int l = R + 1, r = m + L - 1;
		return s[l] <= r; 
	}
};
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, m, q;
	cin >> n >> m >> q;
	init_(n, m);
	rep(i, 0, m - 1) {
		cin >> es[i].first;
		cin >> es[i].second;
	}
	rep(i, m, 2 * m - 1) es[i] = es[i - m];
	solve(0, 2 * m - 1, 0, 2 * m);
	rep(i, 1, q) {
		int L, R;
		cin >> L >> R;
		cout << (query(L, R) ? "YES" : "NO") << "\n"; 
	}
	
	return 0;
}

Compilation message

Joker.cpp:4: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    4 | #pragma loop-opt(on)
      | 
Joker.cpp:21:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   21 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |             ^~~~
Joker.cpp:21:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   21 | void vprint(auto L, auto R) { while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |                     ^~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 312 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 312 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 48 ms 460 KB Output is correct
30 Correct 94 ms 564 KB Output is correct
31 Correct 80 ms 548 KB Output is correct
32 Correct 53 ms 460 KB Output is correct
33 Correct 34 ms 476 KB Output is correct
34 Correct 91 ms 572 KB Output is correct
35 Correct 125 ms 580 KB Output is correct
36 Correct 54 ms 460 KB Output is correct
37 Correct 83 ms 620 KB Output is correct
38 Correct 125 ms 632 KB Output is correct
39 Correct 85 ms 588 KB Output is correct
40 Correct 53 ms 516 KB Output is correct
41 Correct 43 ms 532 KB Output is correct
42 Correct 46 ms 528 KB Output is correct
43 Correct 64 ms 460 KB Output is correct
44 Correct 74 ms 532 KB Output is correct
45 Correct 81 ms 560 KB Output is correct
46 Correct 100 ms 588 KB Output is correct
47 Correct 60 ms 504 KB Output is correct
48 Correct 66 ms 516 KB Output is correct
49 Correct 82 ms 544 KB Output is correct
50 Correct 88 ms 580 KB Output is correct
51 Correct 65 ms 496 KB Output is correct
52 Correct 74 ms 520 KB Output is correct
53 Correct 81 ms 536 KB Output is correct
54 Correct 112 ms 568 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Execution timed out 2093 ms 21828 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 312 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Execution timed out 2093 ms 21828 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 312 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 48 ms 460 KB Output is correct
30 Correct 94 ms 564 KB Output is correct
31 Correct 80 ms 548 KB Output is correct
32 Correct 53 ms 460 KB Output is correct
33 Correct 34 ms 476 KB Output is correct
34 Correct 91 ms 572 KB Output is correct
35 Correct 125 ms 580 KB Output is correct
36 Correct 54 ms 460 KB Output is correct
37 Correct 83 ms 620 KB Output is correct
38 Correct 125 ms 632 KB Output is correct
39 Correct 85 ms 588 KB Output is correct
40 Correct 53 ms 516 KB Output is correct
41 Correct 43 ms 532 KB Output is correct
42 Correct 46 ms 528 KB Output is correct
43 Correct 64 ms 460 KB Output is correct
44 Correct 74 ms 532 KB Output is correct
45 Correct 81 ms 560 KB Output is correct
46 Correct 100 ms 588 KB Output is correct
47 Correct 60 ms 504 KB Output is correct
48 Correct 66 ms 516 KB Output is correct
49 Correct 82 ms 544 KB Output is correct
50 Correct 88 ms 580 KB Output is correct
51 Correct 65 ms 496 KB Output is correct
52 Correct 74 ms 520 KB Output is correct
53 Correct 81 ms 536 KB Output is correct
54 Correct 112 ms 568 KB Output is correct
55 Execution timed out 2094 ms 21660 KB Time limit exceeded
56 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 2 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 2 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 2 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 2 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 312 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 332 KB Output is correct
28 Correct 2 ms 332 KB Output is correct
29 Correct 48 ms 460 KB Output is correct
30 Correct 94 ms 564 KB Output is correct
31 Correct 80 ms 548 KB Output is correct
32 Correct 53 ms 460 KB Output is correct
33 Correct 34 ms 476 KB Output is correct
34 Correct 91 ms 572 KB Output is correct
35 Correct 125 ms 580 KB Output is correct
36 Correct 54 ms 460 KB Output is correct
37 Correct 83 ms 620 KB Output is correct
38 Correct 125 ms 632 KB Output is correct
39 Correct 85 ms 588 KB Output is correct
40 Correct 53 ms 516 KB Output is correct
41 Correct 43 ms 532 KB Output is correct
42 Correct 46 ms 528 KB Output is correct
43 Correct 64 ms 460 KB Output is correct
44 Correct 74 ms 532 KB Output is correct
45 Correct 81 ms 560 KB Output is correct
46 Correct 100 ms 588 KB Output is correct
47 Correct 60 ms 504 KB Output is correct
48 Correct 66 ms 516 KB Output is correct
49 Correct 82 ms 544 KB Output is correct
50 Correct 88 ms 580 KB Output is correct
51 Correct 65 ms 496 KB Output is correct
52 Correct 74 ms 520 KB Output is correct
53 Correct 81 ms 536 KB Output is correct
54 Correct 112 ms 568 KB Output is correct
55 Execution timed out 2093 ms 21828 KB Time limit exceeded
56 Halted 0 ms 0 KB -