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Submission #113557

# Submission time Handle Problem Language Result Execution time Memory
113557 2019-05-26T09:28:48 Z E869120 Simurgh (IOI17_simurgh) C++14
51 / 100
 148 ms 5452 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;

class UnionFind {
public:
	vector<int>par;
	void init(int sz) { par.resize(sz, -1); }
	int root(int pos) {
		if (par[pos] == -1) return pos;
		par[pos] = root(par[pos]);
		return par[pos];
	}
	void unite(int u, int v) { u = root(u); v = root(v); par[u] = v; }
};

int N, M, A[1 << 18], B[1 << 18], id[509][509], col[509], ming[509], represent[509], cnts; bool forced[509];
vector<int>G[509], ans; int rr[509][509];
vector<pair<int, int>> R[509];

void dfs(int root, int pos) {
	if (col[pos] >= 1) return;
	col[pos] = cnts;
	if (id[root][pos] >= 0) {
		represent[cnts] = pos;
		if (root > pos && rr[root][pos] == 1) ming[cnts] = pos;
	}
	for (int t : G[pos]) dfs(root, t);
}

void solve(int pos) {
	UnionFind UF; UF.init(N); vector<int>v;
	for (int i = 0; i < N; i++) { G[i].clear(); R[i].clear(); col[i] = 0; ming[i] = -1; represent[i] = 0; cnts = 0; forced[i] = false; }
	for (int i = 0; i < M; i++) {
		if (A[i] == pos || B[i] == pos) continue;
		if (UF.root(A[i]) == UF.root(B[i])) continue;
		UF.unite(A[i], B[i]); v.push_back(i);
		G[A[i]].push_back(B[i]);
		G[B[i]].push_back(A[i]);
	}
	for (int i = 0; i < N; i++) {
		if (i == pos || col[i] >= 1) continue;
		cnts++; dfs(pos, i);
	}
	for (int i = 1; i <= cnts; i++) { if (ming[i] >= 0) forced[ming[i]] = true; }
	for (int i = 0; i < N; i++) {
		if (id[pos][i] == -1) continue;
		if (pos > i && forced[i] == false) continue;
		
		vector<int>vec = v;
		for (int j = 1; j <= cnts; j++) { if (j == col[i]) continue; vec.push_back(id[pos][represent[j]]); }
		vec.push_back(id[pos][i]);
		int E = count_common_roads(vec);
		R[col[i]].push_back(make_pair(E, i));
	}
	for (int i = 1; i <= cnts; i++) {
		sort(R[i].begin(), R[i].end());
		reverse(R[i].begin(), R[i].end());
		for (int j = 0; j < R[i].size(); j++) { if (R[i][j].first == R[i][0].first) { ans.push_back(id[pos][R[i][j].second]); rr[pos][R[i][j].second] = 1; rr[R[i][j].second][pos] = 1; } }
	}
}

void find_array(int pos) {
	int cx = 0, cnt = 0;
	while (true) {
		int cl = cx, cr = N, cm, minx = (1 << 30);
		for (int i = 0; i < 9; i++) {
			cm = (cl + cr) / 2;
			
			vector<int> vec; for (int j = 0; j < N; j++) { if (j == pos) continue; if (j <= cm) vec.push_back(id[pos][j]); else vec.push_back(id[0][j]); }
			int E = count_common_roads(vec);
			for (int j = cm + 1; j < N; j++) { if (j == pos) continue; E -= rr[0][j]; }
			//cout << "pos = " << pos << ", cm = " << cm << ", E = " << E << ", cnt = " << cnt << endl;
			if (E >= cnt + 1) { minx = min(minx, cm); cr = cm; }
			else { cl = cm; }
		}
		if (minx == (1 << 30)) break;
		ans.push_back(id[pos][minx]); //cout << "# " << pos << " " << minx << endl;
		cx = minx + 1; cnt++;
	}
}

vector<int> find_roads(int n, vector<int> u, vector<int> v) {
	N = n; M = u.size();
	for (int i = 0; i < N; i++) { for (int j = 0; j < N; j++) id[i][j] = -1; }
	for (int i = 0; i < M; i++) { id[u[i]][v[i]] = i; id[v[i]][u[i]] = i; A[i] = u[i]; B[i] = v[i]; }
	if (N * (N - 1) / 2 != M) {
		for (int i = 0; i < N; i++) solve(i);
	}
	else {
		solve(0);
		for (int j = 1; j < N; j++) find_array(j);
	}
	sort(ans.begin(), ans.end());
	ans.erase(unique(ans.begin(), ans.end()), ans.end());
	//cout << "#answer = "; for (int i = 0; i < ans.size(); i++) cout << ans[i] << ", "; cout << endl;
	return ans;
}

Compilation message

simurgh.cpp: In function 'void solve(int)':
simurgh.cpp:59:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < R[i].size(); j++) { if (R[i][j].first == R[i][0].first) { ans.push_back(id[pos][R[i][j].second]); rr[pos][R[i][j].second] = 1; rr[R[i][j].second][pos] = 1; } }
                   ~~^~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 384 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 2 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 384 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 4 ms 512 KB correct
15 Correct 4 ms 512 KB correct
16 Correct 4 ms 512 KB correct
17 Correct 4 ms 640 KB correct
18 Correct 3 ms 512 KB correct
19 Correct 4 ms 640 KB correct
20 Correct 4 ms 512 KB correct
21 Correct 3 ms 640 KB correct
22 Correct 3 ms 512 KB correct
23 Correct 3 ms 512 KB correct
24 Correct 3 ms 640 KB correct
25 Correct 3 ms 640 KB correct
26 Correct 4 ms 640 KB correct
27 Correct 3 ms 512 KB correct
28 Correct 3 ms 640 KB correct
29 Correct 3 ms 512 KB correct
30 Correct 3 ms 512 KB correct
31 Correct 3 ms 640 KB correct
32 Correct 3 ms 640 KB correct
33 Correct 3 ms 640 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 384 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 4 ms 512 KB correct
15 Correct 4 ms 512 KB correct
16 Correct 4 ms 512 KB correct
17 Correct 4 ms 640 KB correct
18 Correct 3 ms 512 KB correct
19 Correct 4 ms 640 KB correct
20 Correct 4 ms 512 KB correct
21 Correct 3 ms 640 KB correct
22 Correct 3 ms 512 KB correct
23 Correct 3 ms 512 KB correct
24 Correct 3 ms 640 KB correct
25 Correct 3 ms 640 KB correct
26 Correct 4 ms 640 KB correct
27 Correct 3 ms 512 KB correct
28 Correct 3 ms 640 KB correct
29 Correct 3 ms 512 KB correct
30 Correct 3 ms 512 KB correct
31 Correct 3 ms 640 KB correct
32 Correct 3 ms 640 KB correct
33 Correct 3 ms 640 KB correct
34 Correct 38 ms 1536 KB correct
35 Correct 148 ms 2040 KB correct
36 Correct 102 ms 1852 KB correct
37 Correct 14 ms 1408 KB correct
38 Correct 144 ms 2040 KB correct
39 Correct 144 ms 2040 KB correct
40 Correct 104 ms 1836 KB correct
41 Correct 35 ms 1536 KB correct
42 Correct 140 ms 2280 KB correct
43 Correct 79 ms 1664 KB correct
44 Correct 73 ms 1752 KB correct
45 Correct 84 ms 1656 KB correct
46 Correct 66 ms 1656 KB correct
47 Correct 30 ms 1528 KB correct
48 Correct 7 ms 1408 KB correct
49 Correct 14 ms 1408 KB correct
50 Correct 33 ms 1408 KB correct
51 Correct 83 ms 1784 KB correct
52 Correct 72 ms 1656 KB correct
53 Correct 68 ms 1784 KB correct
54 Correct 90 ms 1756 KB correct
55 Correct 67 ms 1656 KB correct
56 Correct 72 ms 1656 KB correct
57 Correct 68 ms 1656 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 99 ms 3116 KB correct
4 Incorrect 139 ms 5452 KB WA in grader: NO
5 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 384 KB correct
4 Correct 2 ms 384 KB correct
5 Correct 2 ms 384 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 384 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 2 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 4 ms 512 KB correct
15 Correct 4 ms 512 KB correct
16 Correct 4 ms 512 KB correct
17 Correct 4 ms 640 KB correct
18 Correct 3 ms 512 KB correct
19 Correct 4 ms 640 KB correct
20 Correct 4 ms 512 KB correct
21 Correct 3 ms 640 KB correct
22 Correct 3 ms 512 KB correct
23 Correct 3 ms 512 KB correct
24 Correct 3 ms 640 KB correct
25 Correct 3 ms 640 KB correct
26 Correct 4 ms 640 KB correct
27 Correct 3 ms 512 KB correct
28 Correct 3 ms 640 KB correct
29 Correct 3 ms 512 KB correct
30 Correct 3 ms 512 KB correct
31 Correct 3 ms 640 KB correct
32 Correct 3 ms 640 KB correct
33 Correct 3 ms 640 KB correct
34 Correct 38 ms 1536 KB correct
35 Correct 148 ms 2040 KB correct
36 Correct 102 ms 1852 KB correct
37 Correct 14 ms 1408 KB correct
38 Correct 144 ms 2040 KB correct
39 Correct 144 ms 2040 KB correct
40 Correct 104 ms 1836 KB correct
41 Correct 35 ms 1536 KB correct
42 Correct 140 ms 2280 KB correct
43 Correct 79 ms 1664 KB correct
44 Correct 73 ms 1752 KB correct
45 Correct 84 ms 1656 KB correct
46 Correct 66 ms 1656 KB correct
47 Correct 30 ms 1528 KB correct
48 Correct 7 ms 1408 KB correct
49 Correct 14 ms 1408 KB correct
50 Correct 33 ms 1408 KB correct
51 Correct 83 ms 1784 KB correct
52 Correct 72 ms 1656 KB correct
53 Correct 68 ms 1784 KB correct
54 Correct 90 ms 1756 KB correct
55 Correct 67 ms 1656 KB correct
56 Correct 72 ms 1656 KB correct
57 Correct 68 ms 1656 KB correct
58 Correct 2 ms 384 KB correct
59 Correct 2 ms 384 KB correct
60 Correct 99 ms 3116 KB correct
61 Incorrect 139 ms 5452 KB WA in grader: NO
62 Halted 0 ms 0 KB -