oj.uz

Submission #349480

# Submission time Handle Problem Language Result Execution time Memory
349480 2021-01-17T16:16:53 Z evn Connecting Supertrees (IOI20_supertrees) C++14
100 / 100
 264 ms 26220 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define sz(a) a.size()
typedef long long ll;
typedef pair<int, int> pii;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<class T> using oset=tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
int cmp[1005];
int cmpSize[1005];
vector<vector<int>> adj;
int r = 0;
int cs = 0;
int N;
void dfs(int u){
	cmp[u] = r;
	cs++;
	for(int i = 0; i < N;i ++){
		if(adj[u][i] != 0 && cmp[i] == -1){
			dfs(i);
		}
	}
}
int dsu[1005];
int sz[1005];
int find(int u){
	if(dsu[u] == u)return u;
	return dsu[u] = find(dsu[u]);
}
void merge(int u, int v){
	u = find(u);
	v = find(v);
	if(u == v)return;
	if(sz[u] < sz[v])swap(u,v);
	dsu[v] = u;
	sz[u] += sz[v];
}
int construct(vector<vector<int>> p){
	N = p.size();
	adj.resize(N);
	vector<vector<int>> edges;
	edges.resize(N);
	for(int i = 0; i < N; i++){
		adj[i].resize(N);
		edges[i].resize(N);
		dsu[i] = i;
		sz[i] = 1;
		for(int j = 0;j < N;j ++){
			adj[i][j] = p[i][j];
			if(p[i][j] == 3)return 0;
		}
	}
	memset(cmp, -1, sizeof(cmp));
	for(int i = 0; i < N; i++){
		if(cmp[i] == -1){
			cs = 0;
			r++;
			dfs(i);
			cmpSize[r] = cs;
		}
	}
	for(int i = 0; i < N; i++){
		for(int j = 0;j < N;j ++){
			if(cmp[i] == cmp[j] && p[i][j] == 0){
				return 0;
			}
		}
	}
	for(int i = 0; i < N;i ++){
		int g = 0;
		for(int j =0;j < N; j++){
			g = max(g, p[i][j]);
		}
		if(cmpSize[cmp[i]] <= g && cmpSize[cmp[i]] != 1)return 0;
	}
	//0 = different components
	//1 = same branch
	//2 = in da cycle. can't have multiple cycles in one connected component
	//dsu to store the branches
	for(int i = 0; i < N; i++){
		for(int j =0;j < N; j++){
			if(p[i][j] == 1){
				merge(i,j);
			}
		}
	}
	//store the possible parents of branches
	set<int> pa;
	vector<int> parents;
	for(int i = 0; i < N;i ++){
		pa.insert(find(i));
	}
	for(int u : pa)parents.pb(u);
	//add edges between parents that are in the same cycle
	int prevCmp[N+5];
	int fCmp[N+5];
	memset(fCmp, -1, sizeof(fCmp));
	memset(prevCmp, -1, sizeof(prevCmp));
	for(int i = 0; i < parents.size(); i++){
		int curr = parents[i];
		int comp = cmp[curr];
		if(fCmp[comp] == -1){
			fCmp[comp] = curr;
		}
		//find the previous one in curr's connected comp
		if(prevCmp[comp] != -1){
			//add edge
			edges[prevCmp[comp]][curr] = 1;
			edges[curr][prevCmp[comp]] = 1;
		}
		prevCmp[comp] = curr;
	}
	//create the loop in each component
	for(int i = 1; i <= r; i++){
		if(prevCmp[i] != fCmp[i]){
			if(prevCmp[i] == -1 || fCmp[i] == -1)continue;
			edges[prevCmp[i]][fCmp[i]] = 1;
			edges[fCmp[i]][prevCmp[i]] = 1;
		}
	}
	//add edges in the branches
	int prevD[N+5];
	memset(prevD, -1, sizeof(prevD));
	for(int i = 0; i < N; i++){
		if(prevD[find(i)] != -1){
			edges[prevD[find(i)]][i] = 1;
			edges[i][prevD[find(i)]] = 1;
		}
		prevD[find(i)] = i;
	}
	build(edges);
	return 1;	
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:105:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |  for(int i = 0; i < parents.size(); i++){
      |                 ~~^~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 11 ms 1388 KB Output is correct
7 Correct 253 ms 26092 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 11 ms 1388 KB Output is correct
7 Correct 253 ms 26092 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 11 ms 1388 KB Output is correct
13 Correct 256 ms 26088 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 1004 KB Output is correct
17 Correct 116 ms 16236 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 63 ms 6892 KB Output is correct
21 Correct 264 ms 26092 KB Output is correct
22 Correct 248 ms 26092 KB Output is correct
23 Correct 264 ms 26092 KB Output is correct
24 Correct 250 ms 26220 KB Output is correct
25 Correct 107 ms 16108 KB Output is correct
26 Correct 104 ms 16108 KB Output is correct
27 Correct 263 ms 26092 KB Output is correct
28 Correct 251 ms 26092 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 14 ms 1388 KB Output is correct
9 Correct 253 ms 26220 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 11 ms 1388 KB Output is correct
13 Correct 250 ms 26220 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 1004 KB Output is correct
17 Correct 117 ms 16236 KB Output is correct
18 Correct 0 ms 364 KB Output is correct
19 Correct 0 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 62 ms 6892 KB Output is correct
22 Correct 249 ms 26220 KB Output is correct
23 Correct 262 ms 26092 KB Output is correct
24 Correct 255 ms 26220 KB Output is correct
25 Correct 109 ms 16108 KB Output is correct
26 Correct 106 ms 16108 KB Output is correct
27 Correct 245 ms 26092 KB Output is correct
28 Correct 252 ms 26092 KB Output is correct
29 Correct 104 ms 16108 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 63 ms 6892 KB Output is correct
5 Correct 249 ms 26092 KB Output is correct
6 Correct 253 ms 26092 KB Output is correct
7 Correct 261 ms 26092 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 62 ms 6892 KB Output is correct
10 Correct 248 ms 26092 KB Output is correct
11 Correct 251 ms 26220 KB Output is correct
12 Correct 258 ms 26220 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 62 ms 6892 KB Output is correct
17 Correct 250 ms 26092 KB Output is correct
18 Correct 254 ms 26220 KB Output is correct
19 Correct 256 ms 26092 KB Output is correct
20 Correct 252 ms 26092 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 11 ms 1388 KB Output is correct
7 Correct 253 ms 26092 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 11 ms 1388 KB Output is correct
13 Correct 256 ms 26088 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 1004 KB Output is correct
17 Correct 116 ms 16236 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 63 ms 6892 KB Output is correct
21 Correct 264 ms 26092 KB Output is correct
22 Correct 248 ms 26092 KB Output is correct
23 Correct 264 ms 26092 KB Output is correct
24 Correct 250 ms 26220 KB Output is correct
25 Correct 107 ms 16108 KB Output is correct
26 Correct 104 ms 16108 KB Output is correct
27 Correct 263 ms 26092 KB Output is correct
28 Correct 251 ms 26092 KB Output is correct
29 Correct 0 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 0 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 14 ms 1388 KB Output is correct
37 Correct 253 ms 26220 KB Output is correct
38 Correct 1 ms 492 KB Output is correct
39 Correct 0 ms 364 KB Output is correct
40 Correct 11 ms 1388 KB Output is correct
41 Correct 250 ms 26220 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 117 ms 16236 KB Output is correct
46 Correct 0 ms 364 KB Output is correct
47 Correct 0 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 62 ms 6892 KB Output is correct
50 Correct 249 ms 26220 KB Output is correct
51 Correct 262 ms 26092 KB Output is correct
52 Correct 255 ms 26220 KB Output is correct
53 Correct 109 ms 16108 KB Output is correct
54 Correct 106 ms 16108 KB Output is correct
55 Correct 245 ms 26092 KB Output is correct
56 Correct 252 ms 26092 KB Output is correct
57 Correct 104 ms 16108 KB Output is correct
58 Correct 0 ms 364 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 5 ms 1004 KB Output is correct
61 Correct 115 ms 16236 KB Output is correct
62 Correct 1 ms 364 KB Output is correct
63 Correct 1 ms 364 KB Output is correct
64 Correct 1 ms 364 KB Output is correct
65 Correct 62 ms 6892 KB Output is correct
66 Correct 110 ms 16108 KB Output is correct
67 Correct 112 ms 16108 KB Output is correct
68 Correct 104 ms 16108 KB Output is correct
69 Correct 108 ms 16108 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 11 ms 1388 KB Output is correct
7 Correct 253 ms 26092 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 0 ms 364 KB Output is correct
10 Correct 0 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 11 ms 1388 KB Output is correct
13 Correct 256 ms 26088 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 1004 KB Output is correct
17 Correct 116 ms 16236 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 63 ms 6892 KB Output is correct
21 Correct 264 ms 26092 KB Output is correct
22 Correct 248 ms 26092 KB Output is correct
23 Correct 264 ms 26092 KB Output is correct
24 Correct 250 ms 26220 KB Output is correct
25 Correct 107 ms 16108 KB Output is correct
26 Correct 104 ms 16108 KB Output is correct
27 Correct 263 ms 26092 KB Output is correct
28 Correct 251 ms 26092 KB Output is correct
29 Correct 0 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 0 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 14 ms 1388 KB Output is correct
37 Correct 253 ms 26220 KB Output is correct
38 Correct 1 ms 492 KB Output is correct
39 Correct 0 ms 364 KB Output is correct
40 Correct 11 ms 1388 KB Output is correct
41 Correct 250 ms 26220 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 117 ms 16236 KB Output is correct
46 Correct 0 ms 364 KB Output is correct
47 Correct 0 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 62 ms 6892 KB Output is correct
50 Correct 249 ms 26220 KB Output is correct
51 Correct 262 ms 26092 KB Output is correct
52 Correct 255 ms 26220 KB Output is correct
53 Correct 109 ms 16108 KB Output is correct
54 Correct 106 ms 16108 KB Output is correct
55 Correct 245 ms 26092 KB Output is correct
56 Correct 252 ms 26092 KB Output is correct
57 Correct 104 ms 16108 KB Output is correct
58 Correct 0 ms 364 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 1 ms 364 KB Output is correct
61 Correct 63 ms 6892 KB Output is correct
62 Correct 249 ms 26092 KB Output is correct
63 Correct 253 ms 26092 KB Output is correct
64 Correct 261 ms 26092 KB Output is correct
65 Correct 1 ms 364 KB Output is correct
66 Correct 62 ms 6892 KB Output is correct
67 Correct 248 ms 26092 KB Output is correct
68 Correct 251 ms 26220 KB Output is correct
69 Correct 258 ms 26220 KB Output is correct
70 Correct 1 ms 364 KB Output is correct
71 Correct 1 ms 364 KB Output is correct
72 Correct 1 ms 364 KB Output is correct
73 Correct 62 ms 6892 KB Output is correct
74 Correct 250 ms 26092 KB Output is correct
75 Correct 254 ms 26220 KB Output is correct
76 Correct 256 ms 26092 KB Output is correct
77 Correct 252 ms 26092 KB Output is correct
78 Correct 0 ms 364 KB Output is correct
79 Correct 1 ms 364 KB Output is correct
80 Correct 5 ms 1004 KB Output is correct
81 Correct 115 ms 16236 KB Output is correct
82 Correct 1 ms 364 KB Output is correct
83 Correct 1 ms 364 KB Output is correct
84 Correct 1 ms 364 KB Output is correct
85 Correct 62 ms 6892 KB Output is correct
86 Correct 110 ms 16108 KB Output is correct
87 Correct 112 ms 16108 KB Output is correct
88 Correct 104 ms 16108 KB Output is correct
89 Correct 108 ms 16108 KB Output is correct
90 Correct 1 ms 364 KB Output is correct
91 Correct 1 ms 364 KB Output is correct
92 Correct 5 ms 620 KB Output is correct
93 Correct 103 ms 8300 KB Output is correct
94 Correct 0 ms 364 KB Output is correct
95 Correct 1 ms 364 KB Output is correct
96 Correct 1 ms 364 KB Output is correct
97 Correct 25 ms 2924 KB Output is correct
98 Correct 100 ms 10732 KB Output is correct
99 Correct 101 ms 11372 KB Output is correct
100 Correct 98 ms 10880 KB Output is correct
101 Correct 102 ms 12908 KB Output is correct
102 Correct 98 ms 10220 KB Output is correct
103 Correct 101 ms 10220 KB Output is correct
104 Correct 99 ms 10220 KB Output is correct
105 Correct 108 ms 10220 KB Output is correct