oj.uz

Submission #248854

# Submission time Handle Problem Language Result Execution time Memory
248854 2020-07-13T14:46:10 Z kostia244 Simurgh (IOI17_simurgh) C++17
51 / 100
 216 ms 4608 KB 
#include "simurgh.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn = 505;
int n, m;
vector<array<int, 2>> g[maxn], tr[maxn];
vector<int> state, te, vis, used;
void pre(int v) {
	vis[v] = 1;
	for(auto [i, id] : g[v]) if(!vis[i]) {
		pre(i);
		used.push_back(id);
		te[id] = 1;
		tr[v].push_back({i, id});
		tr[i].push_back({v, id});
	}
}
vector<int> _path;
bool find(int v, int t) {
	if(v == t) return true;
	vis[v] = 1;
	int ok = 0;
	for(auto [i, id] : tr[v]) if(!vis[i]) {
		if(find(i, t)) _path.push_back(id), ok = 1;
	}
	return ok;
}
vector<int> find_path(int u, int v) {
	_path.clear();
	vis.assign(n, 0);
	find(u, v);
	return _path;
}
int alter(int id, int nid) {
	vector<int> t = used;
	for(auto &i : t) if(i == id) swap(i, t.back());
	t.pop_back();
	t.push_back(nid);
	int res = count_common_roads(t);
	//cout << "====query====\n";
	//for(auto i : t) cout << i << " "; cout << " :: " << res << endl;
	return res;
}
std::vector<int> find_roads(int _n, std::vector<int> u, std::vector<int> v) {
	for(int i = 0; i < u.size(); i++) g[u[i]].push_back({v[i], i});
	for(int i = 0; i < u.size(); i++) g[v[i]].push_back({u[i], i});
	n = _n;
	m = u.size();
	state.resize(m);
	te.resize(m);
	vis.resize(n);
	pre(0);
	
	//cout << "Init tree is ";
	//for(auto i : used) cout << u[i] << " " << v[i] << '\n';
	int init = count_common_roads(used);
	//cout << "init " << init << endl;
	for(int i = 0; i < m; i++) if(!te[i]) {
		vector<int> t = find_path(u[i], v[i]);
		
		//cout << "Determining " << u[i] << " " << v[i] << endl;
		//cout << "Path:\n";
		//for(auto i : t) cout << u[i] << " " << v[i] << " | " << i << " " << state[i] << '\n';
		
		int det = 0;
		for(auto id : t) {
			if(state[id]) {
				int tmp = alter(id, i);
				if(state[id] == 2) det = 1+(tmp == init);
				else det = 1+(tmp>init);
				break;
			}
		}
		//cout << "det is " << det << '\n';
		if(det) {
			state[i] = det;
			for(auto &id : t) if(!state[id]) {
				int tmp = alter(id, i);
				if(det == 2) state[id] = 1+(tmp == init);
				else state[id] = 1+(tmp<init);
			}
			continue;
		}
		vector<int> results;
		int mx = init;
		for(auto id : t) {
			results.push_back(alter(id, i));
			mx = max(mx, results.back());
		}
		//cout << "Here, " << mx << '\n';
		for(int i = 0; i < t.size(); i++)
			state[t[i]] = 1+(results[i]!=mx);
		state[i] = 1+(init!=mx);
	}
	
	std::vector<int> r;
	//for(int i = 0; i < m; i++) cout << state[i] << " "; cout << '\n';
	for(int i = 0; i < m; i++) if(state[i] != 1) r.push_back(i);
	//for(auto i : r) cout << i << '\n';
	return r;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < u.size(); i++) g[u[i]].push_back({v[i], i});
                 ~~^~~~~~~~~~
simurgh.cpp:46:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < u.size(); i++) g[v[i]].push_back({u[i], i});
                 ~~^~~~~~~~~~
simurgh.cpp:91:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < t.size(); i++)
                  ~~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 0 ms 384 KB correct
6 Correct 0 ms 384 KB correct
7 Correct 0 ms 384 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 0 ms 384 KB correct
10 Correct 1 ms 384 KB correct
11 Correct 0 ms 384 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 0 ms 384 KB correct
6 Correct 0 ms 384 KB correct
7 Correct 0 ms 384 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 0 ms 384 KB correct
10 Correct 1 ms 384 KB correct
11 Correct 0 ms 384 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 0 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 1 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 1 ms 384 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 0 ms 384 KB correct
6 Correct 0 ms 384 KB correct
7 Correct 0 ms 384 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 0 ms 384 KB correct
10 Correct 1 ms 384 KB correct
11 Correct 0 ms 384 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 0 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 1 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 1 ms 384 KB correct
34 Correct 213 ms 1912 KB correct
35 Correct 206 ms 1664 KB correct
36 Correct 143 ms 1408 KB correct
37 Correct 9 ms 384 KB correct
38 Correct 216 ms 1912 KB correct
39 Correct 180 ms 1664 KB correct
40 Correct 140 ms 1408 KB correct
41 Correct 213 ms 1912 KB correct
42 Correct 211 ms 1792 KB correct
43 Correct 110 ms 1280 KB correct
44 Correct 90 ms 1024 KB correct
45 Correct 108 ms 1144 KB correct
46 Correct 75 ms 896 KB correct
47 Correct 34 ms 640 KB correct
48 Correct 2 ms 384 KB correct
49 Correct 14 ms 384 KB correct
50 Correct 34 ms 640 KB correct
51 Correct 116 ms 1144 KB correct
52 Correct 88 ms 1024 KB correct
53 Correct 76 ms 896 KB correct
54 Correct 112 ms 1280 KB correct
55 Correct 106 ms 1024 KB correct
56 Correct 107 ms 1024 KB correct
57 Correct 105 ms 1024 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Incorrect 168 ms 4608 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB correct
2 Correct 0 ms 384 KB correct
3 Correct 0 ms 384 KB correct
4 Correct 0 ms 384 KB correct
5 Correct 0 ms 384 KB correct
6 Correct 0 ms 384 KB correct
7 Correct 0 ms 384 KB correct
8 Correct 0 ms 384 KB correct
9 Correct 0 ms 384 KB correct
10 Correct 1 ms 384 KB correct
11 Correct 0 ms 384 KB correct
12 Correct 0 ms 384 KB correct
13 Correct 0 ms 384 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 3 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 0 ms 384 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 1 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 1 ms 384 KB correct
34 Correct 213 ms 1912 KB correct
35 Correct 206 ms 1664 KB correct
36 Correct 143 ms 1408 KB correct
37 Correct 9 ms 384 KB correct
38 Correct 216 ms 1912 KB correct
39 Correct 180 ms 1664 KB correct
40 Correct 140 ms 1408 KB correct
41 Correct 213 ms 1912 KB correct
42 Correct 211 ms 1792 KB correct
43 Correct 110 ms 1280 KB correct
44 Correct 90 ms 1024 KB correct
45 Correct 108 ms 1144 KB correct
46 Correct 75 ms 896 KB correct
47 Correct 34 ms 640 KB correct
48 Correct 2 ms 384 KB correct
49 Correct 14 ms 384 KB correct
50 Correct 34 ms 640 KB correct
51 Correct 116 ms 1144 KB correct
52 Correct 88 ms 1024 KB correct
53 Correct 76 ms 896 KB correct
54 Correct 112 ms 1280 KB correct
55 Correct 106 ms 1024 KB correct
56 Correct 107 ms 1024 KB correct
57 Correct 105 ms 1024 KB correct
58 Correct 0 ms 384 KB correct
59 Correct 0 ms 384 KB correct
60 Incorrect 168 ms 4608 KB WA in grader: NO
61 Halted 0 ms 0 KB -