oj.uz

Submission #496161

# Submission time Handle Problem Language Result Execution time Memory
496161 2021-12-20T20:15:56 Z PedroBigMan Simurgh (IOI17_simurgh) C++14
51 / 100
 1572 ms 22104 KB 
/*
Author of all code: Pedro BIGMAN Dias
Last edit: 15/02/2021
*/
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <list>
#include <iomanip>
#include <stdlib.h>
#include <time.h>
#include <cstring>
#include "simurgh.h"
using namespace std;
typedef int ll;
typedef unsigned long long int ull;
typedef long double ld;
#define REP(i,a,b) for(ll i=(ll) a; i<(ll) b; i++)
#define pb push_back
#define mp make_pair
#define pl pair<ll,ll>
#define ff first
#define ss second
#define whole(x) x.begin(),x.end()
#define DEBUG(i) cout<<"Pedro Is The Master "<<i<<endl
#define INF 500000000LL
#define EPS 0.00000001
#define pi 3.14159
#define VV(vvvv,NNNN,xxxx); REP(i,0,NNNN) {vvvv.pb(xxxx);}
ll mod=1000000007LL;

template<class A=ll> 
void Out(vector<A> a) {REP(i,0,a.size()) {cout<<a[i]<<" ";} cout<<endl;}

template<class A=ll>
void In(vector<A> &a, ll N) {A cur; REP(i,0,N) {cin>>cur; a.pb(cur);}} 

class DSU //with range compression and union by subtree size
{
    public:
    ll N;
    vector<ll> p,siz;
    
    DSU(ll n)
    {
        N=n; REP(i,0,N) {p.pb(i); siz.pb(1);}
    }
    
    ll find(ll x)
    {
        if(p[x]==x) {return x;}
        ll ans=find(p[x]);
        p[x]=ans; 
        return ans;
    }
    
    void unionn(ll a, ll b)
    {
        a=find(a); b=find(b);
		if(a==b) {return;}
        if(siz[a]>siz[b]) {swap(a,b);}
        p[a]=b; siz[b]+=siz[a];
    }
	
	vector<vector<ll> > EquivalenceClasses() //O(N)
	{
		vector<vector<ll> > rep; REP(i,0,N) {rep.pb({});}
		REP(i,0,N) {rep[find(i)].pb(i);}
		vector<vector<ll> > CC; 
		REP(i,0,N) {if(rep[i].size()>0) {CC.pb(rep[i]);}}
		return CC;
	}
};

class Graph
{
    public:
    ll N;
    vector<vector<ll> > adj; 
    vector<ll> visited; //for DFS/BFS
    vector<vector<ll> > dfs_tree;
    
    Graph() {ll N=0LL;}
    
    Graph(vector<vector<ll> > ad)
    {
        adj=ad; N=adj.size(); REP(i,0,N) {visited.pb(false);}
		VV(dfs_tree,N,{});
    }
    
    void Reset()
    {
        REP(i,0,N) {visited[i]=false;}
    }
    
    void DFS_Tree(ll s)
    {
        if(visited[s]) {return;}
        visited[s]=true;
        REP(i,0,adj[s].size())
        {
            if(!visited[adj[s][i]]) {dfs_tree[s].pb(adj[s][i]); dfs_tree[adj[s][i]].pb(s); DFS_Tree(adj[s][i]);}
        }
        return;
    }
};

vector<int> find_roads(int n, vector<int> u, vector<int> v) 
{
	ll N=(ll) n; ll M = u.size();
	DSU D(N);
	vector<ll> in; VV(in,M,-1); ll ed=0;
	while(ed<N-1)
	{
		vector<vector<ll> > CC = D.EquivalenceClasses();
		vector<ll> rep; VV(rep,N,-1); REP(i,0,CC.size()) {REP(j,0,CC[i].size()) {rep[CC[i][j]]=i;}}
		vector<vector<ll> > adj; VV(adj,CC.size(),{});
		map<pl,vector<ll> > m; ll a,b;
		REP(i,0,M)
		{
			if(in[i]!=-1) {continue;} 
			a=rep[u[i]]; b=rep[v[i]];
			if(a==b) {in[i]=0; continue;}
			if(m.find({a,b})==m.end()) {m[{a,b}]={}; m[{b,a}]={};}
			m[{a,b}].pb(i); m[{b,a}].pb(i);
		}
		map<pl,vector<ll> >::iterator it=m.begin();
		while(it!=m.end()) {adj[it->ff.ff].pb(it->ff.ss); it++;}
		Graph G(adj); G.Reset(); G.DFS_Tree(0); 
		ll leaf=0; REP(i,0,G.N) {if(G.dfs_tree[i].size()<=1) {leaf=i; break;}}
		vector<ll> c; REP(i,0,M) {if(in[i]==1) {c.pb(i);}}
		ll nei;
		REP(i,0,G.N) 
		{
			if(i==leaf) {continue;}
			REP(j,0,G.dfs_tree[i].size()) {nei=G.dfs_tree[i][j]; if(nei<i || nei==leaf) {continue;} c.pb(m[{i,nei}][0]);}
		}
		vector<pl> results; ll dummy;
		REP(i,0,adj[leaf].size())
		{
			nei=adj[leaf][i];
			REP(j,0,(m[{leaf,nei}].size()))
			{
				c.pb(m[{leaf,nei}][j]);
				//DEBUG(0); REP(z,0,c.size()) {cout<<"("<<u[c[z]]<<","<<v[c[z]]<<") ";}cout<<endl;
				dummy=count_common_roads(c); 
				results.pb({dummy,m[{leaf,nei}][j]});
				c.pop_back();
			}
		}
		sort(whole(results)); reverse(whole(results)); 
		ll edgeindex;
		REP(i,0,results.size())
		{
			edgeindex= results[i].ss;
			if(results[i].ff==results[0].ff) {D.unionn(u[edgeindex],v[edgeindex]); in[edgeindex]=1; ed++;}
			else {in[edgeindex]=0;}
		}
	}
	vector<ll> cc; REP(i,0,M) {if(in[i]==1) {cc.pb(i);}} 
	return cc;
}

Compilation message

simurgh.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization ("O3")
      | 
simurgh.cpp:6: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    6 | #pragma GCC optimization ("unroll-loops")
      | 
simurgh.cpp: In constructor 'Graph::Graph()':
simurgh.cpp:94:17: warning: unused variable 'N' [-Wunused-variable]
   94 |     Graph() {ll N=0LL;}
      |                 ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 1 ms 284 KB correct
5 Correct 1 ms 292 KB correct
6 Correct 1 ms 208 KB correct
7 Correct 0 ms 208 KB correct
8 Correct 0 ms 208 KB correct
9 Correct 0 ms 292 KB correct
10 Correct 0 ms 208 KB correct
11 Correct 1 ms 208 KB correct
12 Correct 1 ms 208 KB correct
13 Correct 1 ms 208 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 1 ms 284 KB correct
5 Correct 1 ms 292 KB correct
6 Correct 1 ms 208 KB correct
7 Correct 0 ms 208 KB correct
8 Correct 0 ms 208 KB correct
9 Correct 0 ms 292 KB correct
10 Correct 0 ms 208 KB correct
11 Correct 1 ms 208 KB correct
12 Correct 1 ms 208 KB correct
13 Correct 1 ms 208 KB correct
14 Correct 5 ms 548 KB correct
15 Correct 3 ms 556 KB correct
16 Correct 3 ms 592 KB correct
17 Correct 7 ms 464 KB correct
18 Correct 3 ms 348 KB correct
19 Correct 6 ms 592 KB correct
20 Correct 4 ms 464 KB correct
21 Correct 5 ms 464 KB correct
22 Correct 6 ms 548 KB correct
23 Correct 7 ms 408 KB correct
24 Correct 6 ms 472 KB correct
25 Correct 3 ms 336 KB correct
26 Correct 5 ms 424 KB correct
27 Correct 8 ms 464 KB correct
28 Correct 4 ms 292 KB correct
29 Correct 4 ms 336 KB correct
30 Correct 4 ms 464 KB correct
31 Correct 4 ms 464 KB correct
32 Correct 5 ms 464 KB correct
33 Correct 5 ms 464 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 1 ms 284 KB correct
5 Correct 1 ms 292 KB correct
6 Correct 1 ms 208 KB correct
7 Correct 0 ms 208 KB correct
8 Correct 0 ms 208 KB correct
9 Correct 0 ms 292 KB correct
10 Correct 0 ms 208 KB correct
11 Correct 1 ms 208 KB correct
12 Correct 1 ms 208 KB correct
13 Correct 1 ms 208 KB correct
14 Correct 5 ms 548 KB correct
15 Correct 3 ms 556 KB correct
16 Correct 3 ms 592 KB correct
17 Correct 7 ms 464 KB correct
18 Correct 3 ms 348 KB correct
19 Correct 6 ms 592 KB correct
20 Correct 4 ms 464 KB correct
21 Correct 5 ms 464 KB correct
22 Correct 6 ms 548 KB correct
23 Correct 7 ms 408 KB correct
24 Correct 6 ms 472 KB correct
25 Correct 3 ms 336 KB correct
26 Correct 5 ms 424 KB correct
27 Correct 8 ms 464 KB correct
28 Correct 4 ms 292 KB correct
29 Correct 4 ms 336 KB correct
30 Correct 4 ms 464 KB correct
31 Correct 4 ms 464 KB correct
32 Correct 5 ms 464 KB correct
33 Correct 5 ms 464 KB correct
34 Correct 432 ms 8004 KB correct
35 Correct 427 ms 7748 KB correct
36 Correct 208 ms 5540 KB correct
37 Correct 24 ms 560 KB correct
38 Correct 588 ms 7964 KB correct
39 Correct 213 ms 6976 KB correct
40 Correct 196 ms 5592 KB correct
41 Correct 103 ms 8032 KB correct
42 Correct 105 ms 7972 KB correct
43 Correct 311 ms 4500 KB correct
44 Correct 517 ms 3632 KB correct
45 Correct 304 ms 4192 KB correct
46 Correct 500 ms 3256 KB correct
47 Correct 265 ms 1624 KB correct
48 Correct 40 ms 452 KB correct
49 Correct 75 ms 700 KB correct
50 Correct 260 ms 1628 KB correct
51 Correct 483 ms 4208 KB correct
52 Correct 432 ms 3636 KB correct
53 Correct 295 ms 3248 KB correct
54 Correct 318 ms 4432 KB correct
55 Correct 223 ms 4224 KB correct
56 Correct 240 ms 4136 KB correct
57 Correct 290 ms 4224 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Incorrect 1572 ms 22104 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB correct
2 Correct 0 ms 204 KB correct
3 Correct 0 ms 204 KB correct
4 Correct 1 ms 284 KB correct
5 Correct 1 ms 292 KB correct
6 Correct 1 ms 208 KB correct
7 Correct 0 ms 208 KB correct
8 Correct 0 ms 208 KB correct
9 Correct 0 ms 292 KB correct
10 Correct 0 ms 208 KB correct
11 Correct 1 ms 208 KB correct
12 Correct 1 ms 208 KB correct
13 Correct 1 ms 208 KB correct
14 Correct 5 ms 548 KB correct
15 Correct 3 ms 556 KB correct
16 Correct 3 ms 592 KB correct
17 Correct 7 ms 464 KB correct
18 Correct 3 ms 348 KB correct
19 Correct 6 ms 592 KB correct
20 Correct 4 ms 464 KB correct
21 Correct 5 ms 464 KB correct
22 Correct 6 ms 548 KB correct
23 Correct 7 ms 408 KB correct
24 Correct 6 ms 472 KB correct
25 Correct 3 ms 336 KB correct
26 Correct 5 ms 424 KB correct
27 Correct 8 ms 464 KB correct
28 Correct 4 ms 292 KB correct
29 Correct 4 ms 336 KB correct
30 Correct 4 ms 464 KB correct
31 Correct 4 ms 464 KB correct
32 Correct 5 ms 464 KB correct
33 Correct 5 ms 464 KB correct
34 Correct 432 ms 8004 KB correct
35 Correct 427 ms 7748 KB correct
36 Correct 208 ms 5540 KB correct
37 Correct 24 ms 560 KB correct
38 Correct 588 ms 7964 KB correct
39 Correct 213 ms 6976 KB correct
40 Correct 196 ms 5592 KB correct
41 Correct 103 ms 8032 KB correct
42 Correct 105 ms 7972 KB correct
43 Correct 311 ms 4500 KB correct
44 Correct 517 ms 3632 KB correct
45 Correct 304 ms 4192 KB correct
46 Correct 500 ms 3256 KB correct
47 Correct 265 ms 1624 KB correct
48 Correct 40 ms 452 KB correct
49 Correct 75 ms 700 KB correct
50 Correct 260 ms 1628 KB correct
51 Correct 483 ms 4208 KB correct
52 Correct 432 ms 3636 KB correct
53 Correct 295 ms 3248 KB correct
54 Correct 318 ms 4432 KB correct
55 Correct 223 ms 4224 KB correct
56 Correct 240 ms 4136 KB correct
57 Correct 290 ms 4224 KB correct
58 Correct 0 ms 204 KB correct
59 Correct 1 ms 204 KB correct
60 Incorrect 1572 ms 22104 KB WA in grader: NO
61 Halted 0 ms 0 KB -