oj.uz

Submission #156792

# Submission time Handle Problem Language Result Execution time Memory
156792 2019-10-07T11:58:13 Z popovicirobert Meetings (JOI19_meetings) C++14
29 / 100
 2000 ms 556 KB 
#include "meetings.h"
#include <bits/stdc++.h>

using namespace std;

static int tot = 0;

struct DSU {
	vector <int> par;
	int n;

	inline void init(int _n) {
		n = _n;
		par.resize(n, -1);	
	}

	int root(int x) {
		if(par[x] == -1) return x;
		return par[x] = root(par[x]);
	}
	
	inline void join(int x, int y) {
		x = root(x), y = root(y);
		if(x != y) {
			par[x] = y;
		}
	}

}dsu;

const int MAXN = 2000;
static int vis[MAXN], now = 0;
static int nodes[MAXN], n;

inline void add(int *special, int x, int &sz) {
	vis[x] = now;
	special[sz++] = x;
}

inline void del(int *special, int x, int &sz) {
	int i, j;
	for(i = 0; i < sz; i++) {
		if(special[i] == x) {
			for(j = i; j + 1 < sz; j++) {
				special[j] = special[j + 1];
			}
			sz--;
			break;

		}
	}
}

void solve(int id) {
	int szn = 0, i;
	for(i = 0; i < n; i++) {
		if(vis[i] == id) {
			nodes[szn++] = i;
			dsu.par[i] = -1;
		}
	}
	if(szn <= 1) return ;
	//random_shuffle(nodes, nodes + szn);
	
	int root = nodes[rand() % szn];
	vis[root] = ++now;

	int special[20], sz = 0;

	for(i = 0; i < szn; i++) {
		int it = nodes[i];
		if(vis[it] == now) continue;

		bool ok = 0;
		for(int i = 0; i < sz; i++) {
			int x = special[i];
			//cerr << x << " " << it << " " << root << "\n";
			int cur = Query(x, it, root);
			if(cur == root) continue;

			dsu.join(x, cur);
			dsu.join(it, cur);
			if(x != cur) {
				del(special, x, sz);
				add(special, cur, sz);
			}
			ok = 1;
			break;
		}
		if(ok == 0) {
			add(special, it, sz);
		}
		if(sz > 18) {
			Bridge(0, 0);
		}
	}

	int bg = now + 1;
	for(i = 0; i < sz; i++) {
		int cur = special[i];
		//cerr << root << " " << cur << "\n";
		Bridge(min(root, cur), max(root, cur));
	}
	for(i = 0; i < szn; i++) {
		if(nodes[i] == root) continue;
		int cur = dsu.root(nodes[i]);
		if(vis[cur] < bg) {
			vis[cur] = ++now;
		}
		vis[nodes[i]] = vis[cur];
	}
	int en = now;
	for(i = bg; i <= en; i++) {
		solve(i);
	}
	
}

void Solve(int N) {
	//double t = clock();
	srand(time(NULL));
	n = N;
	dsu.init(n);
	solve(0);
	//cerr << tot << "\n";
	//cerr << 1.0 * (clock() - t) / CLOCKS_PER_SEC << "\n";
}

Compilation message

meetings.cpp:6:12: warning: 'tot' defined but not used [-Wunused-variable]
 static int tot = 0;
            ^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 248 KB Output is correct
8 Correct 2 ms 248 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 248 KB Output is correct
12 Correct 2 ms 248 KB Output is correct
13 Correct 2 ms 248 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 248 KB Output is correct
8 Correct 2 ms 248 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 248 KB Output is correct
12 Correct 2 ms 248 KB Output is correct
13 Correct 2 ms 248 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 248 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 248 KB Output is correct
4 Correct 2 ms 248 KB Output is correct
5 Correct 2 ms 248 KB Output is correct
6 Correct 2 ms 248 KB Output is correct
7 Correct 2 ms 248 KB Output is correct
8 Correct 2 ms 248 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 248 KB Output is correct
12 Correct 2 ms 248 KB Output is correct
13 Correct 2 ms 248 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 376 KB Output is correct
24 Correct 2 ms 248 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 30 ms 504 KB Output is correct
28 Correct 45 ms 424 KB Output is correct
29 Correct 35 ms 416 KB Output is correct
30 Correct 22 ms 504 KB Output is correct
31 Correct 24 ms 508 KB Output is correct
32 Correct 51 ms 504 KB Output is correct
33 Correct 62 ms 376 KB Output is correct
34 Correct 102 ms 404 KB Output is correct
35 Correct 43 ms 504 KB Output is correct
36 Correct 25 ms 412 KB Output is correct
37 Correct 14 ms 376 KB Output is correct
38 Correct 12 ms 504 KB Output is correct
39 Correct 11 ms 504 KB Output is correct

Subtask #4
0 / 71.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3033 ms 556 KB Time limit exceeded
2 Halted 0 ms 0 KB -