제출 #301758

#제출 시각아이디문제언어결과실행 시간메모리
301758SOIVIEONE슈퍼트리 잇기 (IOI20_supertrees)C++14
0 / 100
1 ms256 KiB
#include "supertrees.h" #include <vector> #include <bits/stdc++.h> using namespace std; int ota[222222]; int find(int x) { return (ota[x] == x ? x : ota[x] = find(ota[x])); } void unite(int x, int y) { x = find(x); y = find(y); ota[y] = x; } int construct(std::vector<std::vector<int>> p) { int n = p.size(); std::vector<std::vector<int>> a; for (int i = 0; i < n; i++) { std::vector<int> row; row.resize(n); a.push_back(row); } for(int i = 0; i < n; i++) { for(int j = 0; j < n; j ++) { if(p[i][j]) { unite(i, j); } } } for(int i = 0; i < n; i ++) { for(int j = 0; j < n; j ++) { int otai = find(i); int otaj = find(j); if(((otai^otaj) && p[i][j]) || (!(otai^otaj) && !p[i][j])) return 0; a[i][j] = (otai==otaj); } } build(a); return 1; }
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