제출 #756630

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
756630		pcc	Teoretičar (COCI18_teoreticar)	C++14	13 / 130	1099 ms	139436 KiB

teoreticar

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define fs first
#define sc second

struct Edge{
	int id;
	int to;
	Edge(){
		id =  to = -1;
	}
	Edge(int ii,int tt){
		id = ii;
		to = tt;
	}
};

const int mxn = 2e5+10;
bitset<mxn> done;
vector<Edge> paths[mxn];
int deg[mxn],ans[mxn];
set<int> col[mxn];
int mex[mxn];

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int L,R,M;
	cin>>L>>R>>M;
	for(int i = 1;i<=M;i++){
		int a,b;
		cin>>a>>b;
		paths[a].push_back(Edge(i,L+b));
		paths[L+b].push_back(Edge(i,a));
		deg[a]++;
		deg[L+b]++;
	}
	priority_queue<pair<int,int>,vector<pair<int,int>>,less<pair<int,int>>> pq;
	pair<int,int> s;
	for(int i = 1;i<=L+R;i++){
		pq.push({deg[i],i});
	}
	fill(mex,mex+mxn,1);
	while(!pq.empty()){
		auto now = pq.top();
		pq.pop();
		if(done[now.sc])continue;
		done[now.sc] = true;
		for(auto nxt:paths[now.sc]){
			if(ans[nxt.id])col[now.sc].insert(ans[nxt.id]);
		}
		while(col[now.sc].find(mex[now.sc]) != col[now.sc].end())mex[now.sc]++;
		for(auto nxt:paths[now.sc]){
			if(ans[nxt.id])continue;
			int v = nxt.to;
			int u = now.sc;
			int tmp;
			for(tmp = mex[u];col[u].find(tmp) != col[u].end()||col[v].find(tmp) != col[v].end();tmp++);
			col[u].insert(tmp);col[v].insert(tmp);
			ans[nxt.id] = tmp;
			while(col[now.sc].find(mex[now.sc]) != col[now.sc].end())mex[now.sc]++;
			deg[nxt.to]--;
			pq.push({deg[nxt.to],nxt.to});
		}
	}
	int mx = *max_element(ans+1,ans+M+1);
	cout<<mx<<'\n';
	for(int i = 1;i<=M;i++)cout<<ans[i]<<'\n';
}

• Subtask 1: 0 / 13
• Subtask 2: 13 / 13
• Subtask 3: 0 / 13
• Subtask 4: 0 / 13
• Subtask 5: 0 / 13
• Subtask 6: 0 / 13
• Subtask 7: 0 / 13
• Subtask 8: 0 / 13
• Subtask 9: 0 / 13
• Subtask 10: 0 / 13