Submission #447334

#	Time	Username	Problem	Language	Result	Execution time	Memory
447334		Habib_Assoev	Connecting Supertrees (IOI20_supertrees)	C++14	11 / 100	318 ms	38536 KiB

supertrees

#include "supertrees.h"
#include<bits/stdc++.h>
#define in freopen ("measurement.in", "r", stdin);
#define out freopen("measurement.out", "w", stdout);
#define ll long long
//#define int long long
#define pf push_front
#define fi first
#define se second
#define speed ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std ;
long long const N = 1e2 + 7;
long long N1 = 1e9 + 7;
const int MOD = 1e9 + 7;

vector < int > used( 1007 );
vector < int > used1( 1007 );
vector < vector < int > > k( 1007 );

void dfs( int u ){
    used[u] = 1;
    for( int i = 0 ; i < k[u].size() ; i ++ ){
        ll tr = k[u][i];
        if( used[tr] == 0 ){
            dfs( tr );
        }
    }
}

int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	std::vector<std::vector<int>> answer;
	set < int > vc;
	int start = -1;
    for( int i = 0 ; i < n ; i ++ ){
        for( int j = 0 ; j < p[i].size(); j ++ ){
            if( p[i][j] == 1 ){
                start = i;
                k[i].push_back( j );
                k[j].push_back( i );
                vc.insert( i );
                vc.insert( j );
                used1[i] = 1;
                used1[j] = 1;
            }
        }
    }
    dfs( start );
    vector < int > v;
    for( auto i : vc ){
        v.push_back( i );
    }
    ll a[n][n];
    for( int i = 0 ; i < n ; i ++ ){
        for( int j = 0 ; j < n ; j ++ ){
            a[i][j] = 0;
        }
    }
    for( int i = 1 ; i < v.size(); i ++ ){
        a[v[i]][v[i-1]] = 1;
        a[v[i-1]][v[i]] = 1;
    }
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		for( int j = 0 ; j < n ; j ++ ){
            row[j] = a[i][j];
		}
		answer.push_back(row);
	}
	ll ch = 0;
	for( int i = 0 ; i < n ; i ++ ){
        //cout << used[i] << ' ' << used1[i] << endl;
        if( used[i] != used1[i] ){
            ch = 1;
        }
	}
    vector < int > e;
    for( int i = 0 ; i < used.size();  i ++ ){
        if( used[i] == 1 ){
            e.push_back( i );
        }
    }
    for( int i = 0 ; i < e.size() ; i ++ ){
        for( int j = 0 ; j < e.size(); j ++ ){
            if( i != j ){
                if( p[i][j] == 0 ){
                    ch = 1;
                }
            }
        }
    }
	if( ch == 1 ){
        return 0;
	}else{
        build(answer);
        return 1;
	}
}

Compilation message (stderr)

supertrees.cpp: In function 'void dfs(int)':
supertrees.cpp:22:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for( int i = 0 ; i < k[u].size() ; i ++ ){
      |                      ~~^~~~~~~~~~~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:36:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for( int j = 0 ; j < p[i].size(); j ++ ){
      |                          ~~^~~~~~~~~~~~~
supertrees.cpp:59:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     for( int i = 1 ; i < v.size(); i ++ ){
      |                      ~~^~~~~~~~~~
supertrees.cpp:79:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |     for( int i = 0 ; i < used.size();  i ++ ){
      |                      ~~^~~~~~~~~~~~~
supertrees.cpp:84:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |     for( int i = 0 ; i < e.size() ; i ++ ){
      |                      ~~^~~~~~~~~~
supertrees.cpp:85:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for( int j = 0 ; j < e.size(); j ++ ){
      |                          ~~^~~~~~~~~~

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