제출 #347152

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
347152		Dilshod_Imomov	슈퍼트리 잇기 (IOI20_supertrees)	C++17	96 / 100	287 ms	26240 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

const int N = 1e3 + 7;

vector < int > adj[N], visited(N);
bool first[N];

void dfs( int v ) {
    visited[v] = 1;
    for ( auto u: adj[v] ) {
        if ( !visited[u] ) {
            dfs(u);
        }
    }
}

int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	std::vector<std::vector<int>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		answer.push_back(row);
	}
	for ( int i = 0; i < n; i++ ) {
        for ( int j = 0; j < n; j++ ) {
            if ( i == j ) {
                continue;
            }
            if ( p[i][j] == 1 ) {
                adj[i].push_back(j);
            }
        }
	}
	vector < int > comp, used(n + 7);
	for ( int i = 0; i < n; i++ ) {
        if ( visited[i] ) {
            continue;
        }
        for ( auto j: adj[i] ) {
        	visited[j] = 1;
        }
        comp.push_back(i);
	}
	int cnt = 0;
    for ( int i = 0; i < n; i++ ) {
        if ( used[i] ) {
            continue;
        }
        used[i] = 1;
        for ( auto j: adj[i] ) {
            answer[i][j] = 1;
            used[j] = 1;
            answer[j][i] = 1;
            for ( auto k: adj[i] ) {
            	if ( j != k && p[j][k] != 1 ) {
            		return 0;
            	}
            }
        }
    }
    int sz = comp.size();
    used = vector < int > (n + 7);
    for ( int i = 0; i < sz; i++ ) {
        vector < int > vc = { comp[i] }, us(n + 7);
        if ( used[ comp[i] ] ) {
            continue;
        }
        used[ comp[i] ] = i + 1;
        us[ comp[i] ] = 1;
        for ( int j = 0; j < sz; j++ ) {
            if ( i != j && p[ comp[i] ][ comp[j] ] == 2 ) {
                vc.push_back(comp[j]);
                us[comp[j]] = 1;
                used[ comp[j] ] = i + 1;
            }
        }
        for ( auto v: vc ) {
	        for ( int j = 0; j < sz; j++ ) {
	        	int u = comp[j];
	        	if ( v != u && p[ v ][u] == 0 ) {
	                for ( auto x: adj[v] ) {
	                	for ( auto y: adj[u] ) {
	                		if ( p[x][y] ) {
	                			return 0;
	                		}
	                	}
	                }
	        	}
	        	if ( v != u && p[v][u] == 2 && !us[u] ) {
	        		return 0;
	        	}
	        }
	    }
        int szz = vc.size();
        if ( szz == 2 ) {
        	return 0;
        }
        for ( int i = 0; i < szz; i++ ) {
        	cnt += adj[ vc[i] ].size() + 1;
        	for ( int j = 0; j < szz; j++ ) {
        		if ( i == j ) {
        			continue;
        		}
        		if ( p[ vc[i] ][ vc[j] ] != 2 ) {
        			return 0;
        		}
        		int v = vc[i], u = vc[j];
        		for ( auto x: adj[v] ) {
        			for ( auto y: adj[u] ) {
        				if( p[x][y] != 2 ) {
        					return 0;
        				}
        			}
        		}
        	}
        }
        for ( int i = 0; i < szz - 1; i++ ) {
            answer[vc[i]][vc[i + 1]] = 1;
            answer[ vc[i + 1] ][ vc[i] ] = 1;
        }
        if ( szz > 1 ) {
            answer[ vc[szz - 1] ][ vc[0] ] = 1;
            answer[ vc[ 0 ] ][ vc[szz - 1] ] = 1;
        }
    }
    if ( cnt != n ) {
    	return 0;
    }
	build(answer);
	return 1;
}

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