oj.uz

Submission #823018

# Submission time Handle Problem Language Result Execution time Memory
823018 2023-08-12T07:04:46 Z NothingXD Connecting Supertrees (IOI20_supertrees) C++17
65 / 100
 173 ms 30028 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

void debug_out(){cerr<<endl;}
template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T){
	cerr << H << ' ';
	debug_out(T...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "): ", debug_out(__VA_ARGS__)
#define F first
#define S second
#define all(x) x.begin() x.end()
#define MP(x, y) make_pair(x, y)

const int maxn = 1e3 + 10;

int n, p[maxn][maxn], dsu[maxn], comp[maxn];
int ans[maxn][maxn];
vector<int> ver[maxn];
int getdsu(int v){
	return (dsu[v] == -1? v: dsu[v] = getdsu(dsu[v]));
}

void merge(int u, int v){
	if ((u = getdsu(u)) == (v = getdsu(v))) return;
	ans[u][v] = ans[v][u] = 1;
	dsu[u] = v;
}

bool merge2(int u, int v){
//	debug(u, v);
	u = comp[u], v = comp[v];
	if (u == v) return true;
	for (auto x: ver[u]){
		for (auto y: ver[v]){
			if (p[x][y] != 2) return false;
		}
	}
	for (auto x: ver[v]){
		if (x == v) continue;
		ver[u].push_back(x);
		comp[x] = u;
	}
	ver[u].push_back(v);
	comp[v] = u;
	return true;
}

int construct(vector<vector<int>> P) {
	n = P.size();
	for (int i = 0; i < n; i++){
		for (int j = 0; j < n; j++){
			p[i][j] = P[i][j];
		}
	}
	memset(dsu, -1, sizeof dsu);
	for (int i = 0; i < n; i++){
		for (int j = 0; j < n; j++){
			if (p[i][j] != p[j][i]) return 0;
			if (p[i][j] == 1) merge(i, j);
		}
	}
//	debug(1);
	for (int i = 0; i < n; i++){
		for (int j = 0; j < n; j++){
			if (p[i][j] == 2 && getdsu(i) == getdsu(j)) return 0;
		}
	}
//	debug(2);
	for (int i = 0; i < n; i++){
		int x = getdsu(i);
//		debug(i, x);
		ver[x].push_back(i);
		comp[i] = x;
	}
	for (int i = 0; i < n; i++){
		for (int j = 0; j < n; j++){
			if (p[i][j] == 2){
				if (!merge2(i, j)) return 0;
			}
		}
	}
//	debug(3);
	for (int i = 0; i < n; i++){
		ver[i].clear();
	}
	for (int i = 0; i < n; i++){
		if (dsu[i] == -1){
//			debug(i, comp[i]);
			ver[comp[i]].push_back(i);
		}
	}
	for (int i = 0; i < n; i++){
//		debug(i, ver[i].size());
		if (ver[i].size() < 2) continue;
		if (ver[i].size() == 2) return 0;
		for (int j = 1; j < ver[i].size(); j++){
			ans[ver[i][j-1]][ver[i][j]] = ans[ver[i][j]][ver[i][j-1]] = 1;
		}
		ans[ver[i][0]][ver[i].back()] = ans[ver[i].back()][ver[i][0]] = 1;
	}
//	debug(4);
	vector<vector<int>> res(n);
	for (int i = 0; i < n; i++){
		res[i].resize(n);
		for (int j = 0; j < n; j++){
			res[i][j] = ans[i][j];
		}
	}
	build(res);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:105:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |   for (int j = 1; j < ver[i].size(); j++){
      |                   ~~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 7 ms 2800 KB Output is correct
7 Correct 172 ms 29912 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 7 ms 2800 KB Output is correct
7 Correct 172 ms 29912 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 10 ms 2040 KB Output is correct
13 Correct 161 ms 26020 KB Output is correct
14 Incorrect 1 ms 340 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 9 ms 2004 KB Output is correct
9 Correct 161 ms 26080 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 7 ms 2772 KB Output is correct
13 Correct 162 ms 29992 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 5 ms 1364 KB Output is correct
17 Correct 74 ms 12212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 40 ms 9640 KB Output is correct
22 Correct 159 ms 29984 KB Output is correct
23 Correct 157 ms 29924 KB Output is correct
24 Correct 173 ms 30028 KB Output is correct
25 Correct 72 ms 12452 KB Output is correct
26 Correct 68 ms 12212 KB Output is correct
27 Correct 157 ms 29940 KB Output is correct
28 Correct 163 ms 29908 KB Output is correct
29 Correct 69 ms 12324 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 40 ms 9516 KB Output is correct
5 Correct 161 ms 29992 KB Output is correct
6 Correct 154 ms 29484 KB Output is correct
7 Correct 160 ms 29988 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 40 ms 9640 KB Output is correct
10 Correct 159 ms 29992 KB Output is correct
11 Correct 160 ms 29952 KB Output is correct
12 Correct 164 ms 29948 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 40 ms 9520 KB Output is correct
17 Correct 157 ms 30000 KB Output is correct
18 Correct 163 ms 29860 KB Output is correct
19 Correct 165 ms 29916 KB Output is correct
20 Correct 163 ms 26280 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 7 ms 2800 KB Output is correct
7 Correct 172 ms 29912 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 10 ms 2040 KB Output is correct
13 Correct 161 ms 26020 KB Output is correct
14 Incorrect 1 ms 340 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 7 ms 2800 KB Output is correct
7 Correct 172 ms 29912 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 10 ms 2040 KB Output is correct
13 Correct 161 ms 26020 KB Output is correct
14 Incorrect 1 ms 340 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -