제출 #478348

#제출 시각아이디문제언어결과실행 시간메모리
478348ponytail슈퍼트리 잇기 (IOI20_supertrees)C++17
21 / 100
253 ms24008 KiB
#include "supertrees.h" #include <bits/stdc++.h> #include <vector> #include <cassert> #include <cstdio> #include <cstdlib> #include <string> using namespace std; int dsu[1000]; int set_of(int u) { if(dsu[u] == u) return u; return dsu[u] = set_of(dsu[u]); } void union_(int u, int v) { dsu[set_of(u)] = set_of(v); } 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++) { dsu[i] = i; } for(int i=0; i<n; i++) { for(int j=0; j<n; j++) { if(p[i][j] == 1 && set_of(i) != set_of(j)) { union_(i, j); answer[i][j] = answer[j][i] = 1; } } } for(int i=0; i<n; i++) { for(int j=0; j<n; j++) { if(p[i][j] == 0 && set_of(i) == set_of(j)) { return 0; } } } build(answer); return 1; }
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