제출 #572158

#제출 시각아이디문제언어결과실행 시간메모리
572158fuad27슈퍼트리 잇기 (IOI20_supertrees)C++17
11 / 100
207 ms24160 KiB
#include "supertrees.h" #include <vector> #include<bits/stdc++.h> using namespace std; int construct(std::vector<std::vector<int>> p) { int n = p.size(); for(int i = 0;i<n;i++) { for(int j = 0;j<n;j++) { if(p[i][j] == 3 or p[i][j]!=p[j][i])return 0; } } vector<vector<int>> ans(n,vector<int> (n,0)); { vector<bool> vis(n); vector<int> t; for(int i = 0;i<n;i++) { if(vis[i])continue; vector<int> cur; for(int j = 0;j<n;j++) { if(p[i][j] == 1) { cur.push_back(j); vis[j]=1; } } for(int j = 0;j<(int)cur.size()-1;j++) { ans[cur[j]][cur[j+1]]=1; ans[cur[j+1]][cur[j]]=1; } t.push_back(i); } for(int i = 0;i<n;i++)vis[i]=0; vector<int> cur; for(int j:t) { bool flag = 0; for(int &i:cur) { if(p[j][i] == 2) { ans[i][j] = ans[j][i] = 1; i = j; flag=1; break; } } if(!flag)cur.push_back(j); } } build(ans); return 1; }
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