Submission #317168

#	Time	Username	Problem	Language	Result	Execution time	Memory
317168		amunduzbaev	Connecting Supertrees (IOI20_supertrees)	C++14	21 / 100	469 ms	25208 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){
		int start;
		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){
		int start;
		vector<int> v;
		for(int i=0;i<n;i++){
			for(int j=i+1;j<n;j++){
				if(p[i][j] == 2){
					v.push_back(i);
					v.push_back(j);
				}
			}
		}
		start = v[0];
		for(auto x:v){
			b[start][x] = 1;
			b[x][start] = 1;
		}
		b[v[v.size()-1]][start] = 1;
		b[start][v[v.size()-1]] = 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

*/

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:39:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |    for(int j=0;j<v[i].size();j++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(int l=j;l<v[i].size();l++){
      |                 ~^~~~~~~~~~~~
supertrees.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 j=0;j<v[i].size();j++){
      |                ~^~~~~~~~~~~~
supertrees.cpp:31:7: warning: unused variable 'start' [-Wunused-variable]
   31 |   int start;
      |       ^~~~~

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