Submission #317178

#	Time	Username	Problem	Language	Result	Execution time	Memory
317178		amunduzbaev	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	467 ms	25336 KiB

supertrees

//#include "grader.cpp"
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
const int N=1005;
int used[N];

int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int> > b(n);
	bool ok1=0, ok2=0, ok0=0;
	for(int i=0;i<n;i++){
		b[i].resize(n);
		for(int j=0;j<n;j++){
			b[i][j]=0;
			if(p[i][j] == 1) ok1=1;
			else if(p[i][j] == 2) ok2=1;
			else ok0 = 1;
		}
	}
	if(ok1 && !ok2 && !ok0){
		for(int i=1;i<n;i++){
			b[0][i] = 1;
			b[i][0] = 1;
		}
		build(b);
		return 1;
	}
	
	else if(ok1 || ok0 && !ok2){
		vector<vector<int>> v(n);
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				if(p[i][j] == 1 && i!=j){
					v[i].push_back(j);
				}
			}
			for(int j=0;j<v[i].size();j++){
				if(!p[v[i][j]][i]) return 0;
				for(int l=j;l<v[i].size();l++){
					if(!p[v[i][l]][v[i][j]]) return 0;
				}
			}
		}
		for(int i=0;i<n;i++){
			if(used[i]) continue;
			for(int j=0;j<v[i].size();j++){
				used[v[i][j]] = 1;
				b[i][v[i][j]] = 1;
				b[v[i][j]][i] = 1;
			}
		}
		build(b);
		return 1;
	}
	else if(ok2 || ok0&&!ok1){
		vector<vector<int>> v(n);
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				if(p[i][j] == 2 && i!=j){
					v[i].push_back(j);
				}
			}
			for(int j=0;j<v[i].size();j++){
				if(!p[v[i][j]][i]) return 0;
				for(int l=j+1;l<v[i].size();l++){
					if(!p[v[i][l]][v[i][j]]) return 0;				
				}
			}
		}
		for(int i=0;i<n;i++){
			if(used[i]) continue;
			b[i][v[i][0]] = 1;
			b[v[i][0]][i] = 1;
			int sz=v[i].size();
			for(int j=0;j<sz-1;j++){
				used[v[i][j]] = 1;
				b[v[i][j]][v[i][j+1]] = 1;
				b[v[i][j+1]][v[i][j]] = 1;
			}
			b[i][v[i][sz-1]] = 1;
			b[v[i][sz-1]][i] = 1;

		}
		build(b);
		return 1;
	}
	
	return 0;
}

/*

4
1 1 1 0
1 1 1 1
1 1 1 1
0 0 0 1


4
1 1 1 0
1 1 1 0
1 1 1 0
0 0 0 1

4
0 2 2 2
2 0 2 2
2 2 0 2
2 2 2 0
*/

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:30:21: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   30 |  else if(ok1 || ok0 && !ok2){
      |                 ~~~~^~~~~~~
supertrees.cpp:38:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |    for(int j=0;j<v[i].size();j++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for(int l=j;l<v[i].size();l++){
      |                 ~^~~~~~~~~~~~
supertrees.cpp:47:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |    for(int j=0;j<v[i].size();j++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:56:20: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   56 |  else if(ok2 || ok0&&!ok1){
      |                 ~~~^~~~~~
supertrees.cpp:64:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |    for(int j=0;j<v[i].size();j++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:66:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for(int l=j+1;l<v[i].size();l++){
      |                   ~^~~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 10 / 10
• Subtask 3: 0 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4