oj.uz

Submission #1083740

# Submission time Handle Problem Language Result Execution time Memory
1083740 2024-09-03T23:30:28 Z rayan_bd Connecting Supertrees (IOI20_supertrees) C++17
19 / 100
 121 ms 24160 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;

vector<int> par(1015),sz(1015,1);

int findPar(int u){
	if(par[u]==u) return u;
	return par[u]=findPar(par[u]);
}

void unite(int u,int v){
	int ulp=findPar(u);
	int vlp=findPar(v);
	if(ulp==vlp) return;
	if(sz[ulp]>sz[vlp]){
		par[vlp]=ulp;
		sz[ulp]+=sz[vlp];
	}else{
		par[ulp]=vlp;
		sz[vlp]+=sz[ulp];
	}
}
bool is_samee(int u,int v){
	return findPar(u)==findPar(v);
}

int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> adj(n,vector<int>(n,0));

	for(int i=0;i<n;++i) par[i]=i;

	for(int i=0;i<n;++i){
		for(int j=i+1;j<n;++j){
			if(p[i][j]>0) unite(i,j); 
		}
	}

	for(int i=0;i<n;++i){
		if(sz[findPar(i)]==2) return 0;
		for(int j=i+1;j<n;++j){
			if(p[i][j]==0&&is_samee(i,j)){
				return 0;
			}
		}
	}

	vector<int> last(n+1,-1),first(n+1,-1);

	for(int i=0;i<n;++i){
		int ulp=findPar(i);
		if(last[ulp]!=-1){
			adj[i][last[ulp]]=1;
			adj[last[ulp]][i]=1;
		}
		if(first[ulp]==-1) first[ulp]=i;
		last[ulp]=i;
	}

	for(int i=0;i<n;++i){
		int ulp=findPar(i);
		if(sz[ulp]>1) adj[last[ulp]][first[ulp]]=adj[first[ulp]][last[ulp]]=1;
	}


	build(adj);
	return 1;
}

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 5 ms 1372 KB Output is correct
9 Correct 115 ms 24080 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1384 KB Output is correct
13 Correct 114 ms 24160 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 63 ms 14228 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 29 ms 6280 KB Output is correct
22 Correct 120 ms 24148 KB Output is correct
23 Correct 118 ms 24144 KB Output is correct
24 Correct 121 ms 24148 KB Output is correct
25 Correct 51 ms 14164 KB Output is correct
26 Correct 53 ms 14224 KB Output is correct
27 Correct 112 ms 24144 KB Output is correct
28 Correct 121 ms 23992 KB Output is correct
29 Correct 51 ms 14164 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Incorrect 0 ms 348 KB Too many ways to get from 1 to 4, should be 1 found no less than 2
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 348 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -