oj.uz

Submission #804421

# Submission time Handle Problem Language Result Execution time Memory
804421 2023-08-03T08:38:24 Z ngrace Simurgh (IOI17_simurgh) C++14
51 / 100
 113 ms 3448 KB 
#include "simurgh.h"

//could probs be optimised to not tle on sub3

#include <bits/stdc++.h>
using namespace std;
#define ve vector
#define ll long long
#define ii pair<int, int>
#define fi first
#define se second

int N;
set<int> ans;
int edgeInd[240][240];

struct DSU{
	int par[500];
	int si=0;
	DSU(int siz){
		si=siz;
		reset();
	}
	void reset(){
		for(int i=0; i<si; i++) par[i]=i;
	}
	int root(int x) {
		return (x==par[x]) ? x : par[x]=root(par[x]);
	}
	void doUnion(int a, int b){
		par[root(a)]=root(b);
	}
};



std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	N = n;

	if(n==2){
		ve<int> res = {0};
		return res;
	}

	for(int i=0; i<240; i++){
		for(int j=0; j<240; j++){
			edgeInd[i][j] = -1;
		}
	}
	for(int i=0; i < u.size(); i++){
		edgeInd[u[i]][v[i]] = i;
		edgeInd[v[i]][u[i]] = i;
	}

	ve<ve<bool>> known(N, ve<bool>(N, false));
	for(int i=0; i<N; i++){
		ve<int> tree;
		DSU comp(N);
		for(int a=0; a<N; a++){
			if(a==i) continue;
			for(int b=a+1; b<N; b++){
				if(b==i || edgeInd[a][b]==-1) continue;
				if(comp.root(a)==comp.root(b)) continue;
				tree.push_back(edgeInd[a][b]);
				comp.doUnion(a, b);
			}
		}
		set<int> comps;
		for(int a=0; a<N; a++){
			if(a==i) continue;
			comps.insert(comp.root(a));
		}
		ve<ve<int>> compGroups;
		for(int a:comps){
			compGroups.push_back({});
			for(int b=0; b<N; b++){
				if(comp.root(a)==comp.root(b) && edgeInd[i][b]!=-1) compGroups.back().push_back(b);
			}
		}

		for(int j=0; j<compGroups.size(); j++){
			for(int tmp=0; tmp<compGroups.size(); tmp++){
				if(tmp==j) continue;
				tree.push_back(edgeInd[i][compGroups[tmp][0]]);
			}
			int ma=0;
			ve<int> cou(N, -1);
			bool first=true;
			for(int node:compGroups[j]){
				if(known[i][node]){
					cou[node] = -1;
					if(ans.find(edgeInd[i][node])==ans.end() || !first) continue;
					first=false;
				}
				tree.push_back(edgeInd[i][node]);
				cou[node] = count_common_roads(tree);
				ma = max(ma, cou[node]);
				tree.pop_back();
				known[i][node] = known[node][i] = true;
			}
			
			for(int node:compGroups[j]){
				if(cou[node]<ma) continue;
				//cout<<"Edge from "<<i<<" to "<<node<<endl;
				ans.insert(edgeInd[i][node]);
			}

			for(int tmp=0; tmp<compGroups.size()-1; tmp++) tree.pop_back();
		}
	}

	ve<int> res;
	for(int i:ans) res.push_back(i);
	return res;
}

Compilation message

simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:50:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |  for(int i=0; i < u.size(); i++){
      |               ~~^~~~~~~~~~
simurgh.cpp:81:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |   for(int j=0; j<compGroups.size(); j++){
      |                ~^~~~~~~~~~~~~~~~~~
simurgh.cpp:82:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |    for(int tmp=0; tmp<compGroups.size(); tmp++){
      |                   ~~~^~~~~~~~~~~~~~~~~~
simurgh.cpp:108:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |    for(int tmp=0; tmp<compGroups.size()-1; tmp++) tree.pop_back();
      |                   ~~~^~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB correct
2 Correct 1 ms 432 KB correct
3 Correct 1 ms 432 KB correct
4 Correct 1 ms 468 KB correct
5 Correct 1 ms 468 KB correct
6 Correct 1 ms 468 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 1 ms 468 KB correct
9 Correct 1 ms 468 KB correct
10 Correct 1 ms 524 KB correct
11 Correct 1 ms 468 KB correct
12 Correct 1 ms 468 KB correct
13 Correct 1 ms 468 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB correct
2 Correct 1 ms 432 KB correct
3 Correct 1 ms 432 KB correct
4 Correct 1 ms 468 KB correct
5 Correct 1 ms 468 KB correct
6 Correct 1 ms 468 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 1 ms 468 KB correct
9 Correct 1 ms 468 KB correct
10 Correct 1 ms 524 KB correct
11 Correct 1 ms 468 KB correct
12 Correct 1 ms 468 KB correct
13 Correct 1 ms 468 KB correct
14 Correct 2 ms 440 KB correct
15 Correct 2 ms 440 KB correct
16 Correct 2 ms 468 KB correct
17 Correct 2 ms 468 KB correct
18 Correct 1 ms 468 KB correct
19 Correct 2 ms 560 KB correct
20 Correct 2 ms 440 KB correct
21 Correct 1 ms 468 KB correct
22 Correct 1 ms 468 KB correct
23 Correct 1 ms 468 KB correct
24 Correct 1 ms 468 KB correct
25 Correct 1 ms 468 KB correct
26 Correct 1 ms 436 KB correct
27 Correct 1 ms 468 KB correct
28 Correct 1 ms 468 KB correct
29 Correct 1 ms 468 KB correct
30 Correct 1 ms 468 KB correct
31 Correct 1 ms 468 KB correct
32 Correct 1 ms 468 KB correct
33 Correct 1 ms 468 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB correct
2 Correct 1 ms 432 KB correct
3 Correct 1 ms 432 KB correct
4 Correct 1 ms 468 KB correct
5 Correct 1 ms 468 KB correct
6 Correct 1 ms 468 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 1 ms 468 KB correct
9 Correct 1 ms 468 KB correct
10 Correct 1 ms 524 KB correct
11 Correct 1 ms 468 KB correct
12 Correct 1 ms 468 KB correct
13 Correct 1 ms 468 KB correct
14 Correct 2 ms 440 KB correct
15 Correct 2 ms 440 KB correct
16 Correct 2 ms 468 KB correct
17 Correct 2 ms 468 KB correct
18 Correct 1 ms 468 KB correct
19 Correct 2 ms 560 KB correct
20 Correct 2 ms 440 KB correct
21 Correct 1 ms 468 KB correct
22 Correct 1 ms 468 KB correct
23 Correct 1 ms 468 KB correct
24 Correct 1 ms 468 KB correct
25 Correct 1 ms 468 KB correct
26 Correct 1 ms 436 KB correct
27 Correct 1 ms 468 KB correct
28 Correct 1 ms 468 KB correct
29 Correct 1 ms 468 KB correct
30 Correct 1 ms 468 KB correct
31 Correct 1 ms 468 KB correct
32 Correct 1 ms 468 KB correct
33 Correct 1 ms 468 KB correct
34 Correct 98 ms 1124 KB correct
35 Correct 103 ms 1176 KB correct
36 Correct 83 ms 980 KB correct
37 Correct 15 ms 584 KB correct
38 Correct 105 ms 1192 KB correct
39 Correct 90 ms 1116 KB correct
40 Correct 90 ms 996 KB correct
41 Correct 113 ms 1196 KB correct
42 Correct 97 ms 1192 KB correct
43 Correct 54 ms 900 KB correct
44 Correct 47 ms 832 KB correct
45 Correct 54 ms 880 KB correct
46 Correct 43 ms 796 KB correct
47 Correct 23 ms 596 KB correct
48 Correct 11 ms 468 KB correct
49 Correct 14 ms 584 KB correct
50 Correct 23 ms 656 KB correct
51 Correct 52 ms 884 KB correct
52 Correct 47 ms 724 KB correct
53 Correct 43 ms 724 KB correct
54 Correct 56 ms 884 KB correct
55 Correct 54 ms 880 KB correct
56 Correct 55 ms 852 KB correct
57 Correct 55 ms 884 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB correct
2 Correct 1 ms 468 KB correct
3 Runtime error 14 ms 3448 KB Execution killed with signal 11
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB correct
2 Correct 1 ms 432 KB correct
3 Correct 1 ms 432 KB correct
4 Correct 1 ms 468 KB correct
5 Correct 1 ms 468 KB correct
6 Correct 1 ms 468 KB correct
7 Correct 1 ms 212 KB correct
8 Correct 1 ms 468 KB correct
9 Correct 1 ms 468 KB correct
10 Correct 1 ms 524 KB correct
11 Correct 1 ms 468 KB correct
12 Correct 1 ms 468 KB correct
13 Correct 1 ms 468 KB correct
14 Correct 2 ms 440 KB correct
15 Correct 2 ms 440 KB correct
16 Correct 2 ms 468 KB correct
17 Correct 2 ms 468 KB correct
18 Correct 1 ms 468 KB correct
19 Correct 2 ms 560 KB correct
20 Correct 2 ms 440 KB correct
21 Correct 1 ms 468 KB correct
22 Correct 1 ms 468 KB correct
23 Correct 1 ms 468 KB correct
24 Correct 1 ms 468 KB correct
25 Correct 1 ms 468 KB correct
26 Correct 1 ms 436 KB correct
27 Correct 1 ms 468 KB correct
28 Correct 1 ms 468 KB correct
29 Correct 1 ms 468 KB correct
30 Correct 1 ms 468 KB correct
31 Correct 1 ms 468 KB correct
32 Correct 1 ms 468 KB correct
33 Correct 1 ms 468 KB correct
34 Correct 98 ms 1124 KB correct
35 Correct 103 ms 1176 KB correct
36 Correct 83 ms 980 KB correct
37 Correct 15 ms 584 KB correct
38 Correct 105 ms 1192 KB correct
39 Correct 90 ms 1116 KB correct
40 Correct 90 ms 996 KB correct
41 Correct 113 ms 1196 KB correct
42 Correct 97 ms 1192 KB correct
43 Correct 54 ms 900 KB correct
44 Correct 47 ms 832 KB correct
45 Correct 54 ms 880 KB correct
46 Correct 43 ms 796 KB correct
47 Correct 23 ms 596 KB correct
48 Correct 11 ms 468 KB correct
49 Correct 14 ms 584 KB correct
50 Correct 23 ms 656 KB correct
51 Correct 52 ms 884 KB correct
52 Correct 47 ms 724 KB correct
53 Correct 43 ms 724 KB correct
54 Correct 56 ms 884 KB correct
55 Correct 54 ms 880 KB correct
56 Correct 55 ms 852 KB correct
57 Correct 55 ms 884 KB correct
58 Correct 1 ms 212 KB correct
59 Correct 1 ms 468 KB correct
60 Runtime error 14 ms 3448 KB Execution killed with signal 11
61 Halted 0 ms 0 KB -