제출 #613718

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
613718		Koosha_mv	슈퍼트리 잇기 (IOI20_supertrees)	C++14	11 / 100	901 ms	36092 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,int(v.size())) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first

const int N=1010;

int n,cnt,valid=1,vis[N],ted[N],cmp[N],p[N][N];
vector<int> vec,g[N];
vector<vector<int>> ans;

void add_edge(int u,int v){
	//cout<<u<<" -> "<<v<<endl;
	ans[u][v]=1;
	ans[v][u]=1;
}
int calc(int u,int x){
	int res=0;
	f(i,0,n) res+=(p[u][i]==x);
	return res;
}
void dfs1(int u){
	vis[u]=1,cnt++;
	ted[cmp[u]]++;
	for(auto v : g[u]){
		if(vis[v]) continue ;
		cmp[v]=cmp[u];
		dfs1(v);
		add_edge(cmp[u],v);
		if(calc(v,1)!=calc(u,1)) valid=0;
	}

}
void dfs2(int u){
	vis[u]=1;
	cnt+=ted[u];
	vec.pb(u);
	for(auto v : g[u]){
		if(vis[v]) continue ;
		dfs2(v);
	}
}
int construct(vector<vector<int>> _p) {
	n=_p.size(),ans=_p;
	f(i,0,n) f(j,0,n){
		ans[i][j]=0;
		p[i][j]=_p[i][j];
		if(p[i][j]>2) valid=0;
	}
	f(i,0,n) f(j,0,n){
		if(p[i][j]==1){
			g[i].pb(j);
			g[j].pb(i);
		}
	}
	f(i,0,n){
		if(vis[i]) continue ;
		cnt=0;
		cmp[i]=i;
		dfs1(i);
		if(calc(i,1)!=cnt) valid=0;
	}
	f(i,0,n) vis[i]=0,g[i].clear();
	f(i,0,n) f(j,0,n){
		if(p[i][j]==2){
			g[cmp[i]].pb(cmp[j]);
			g[cmp[j]].pb(cmp[i]);
		}
	}
	f(i,0,n){
		if(cmp[i]!=i || vis[i]) continue ;
		vec.clear(),cnt=0;
		dfs2(i);
		if(vec.size()>1){
			f(j,0,int(vec.size())){
				add_edge(vec[j],(j+1==int(vec.size()) ? vec[0] : vec[j+1]));
			}
		}
		if(vec.size()==2){
			valid=0;
		}
		f(u,0,n){
			if(vis[cmp[u]]==0) continue ;
			if(calc(u,1)+calc(u,2)!=cnt){
				valid=0;
			}
		}
	}
	if(valid==0) return 0;
	build(ans);
	return 1;
}

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