oj.uz

Submission #400054

# Submission time Handle Problem Language Result Execution time Memory
400054 2021-05-07T09:21:35 Z kshitij_sodani Simurgh (IOI17_simurgh) C++14
100 / 100
 2863 ms 8880 KB 
//#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
#define endl '\n'
#define ask ask3
//#define ask3 
#include "simurgh.h"
int par[513];
int par2[513];
int count3=0;
int tt[500*500];
int ask3(vector<int> xx){

	count3++;
	return count_common_roads(xx);
}
vector<pair<int,int>> adj[513];
int ind5[513][513];
int n;
int vis[513];
vector<int> uu;
vector<int> vv;
int find(int no){
	if(par[no]==no){
		return no;
	}
	par[no]=find(par[no]);
	return par[no];
}
int find2(int no){
	if(par2[no]==no){
		return no;
	}
	par2[no]=find2(par2[no]);
	return par2[no];
}
int ca=-1;
vector<int> pp;
vector<int> pp2;
void dfs(int no,int par2=-1){
	if(no==ca){
		pp2=pp;
	}
	for(auto j:adj[no]){
		if(j.a!=par2){
			pp.pb(j.b);
			dfs(j.a,no);
			pp.pop_back();
		}
	}
}
vector<int> ans2;
vector<int> ans;
int count2=0;
int ask2(vector<pair<int,int>> cur){
	for(int i=0;i<n;i++){
		adj[i].clear();
	}
	for(int i=0;i<uu.size();i++){
		if(tt[i]==0){
			adj[uu[i]].pb({vv[i],i});
			adj[vv[i]].pb({uu[i],i});
		}
	}
	for(auto j:cur){
		ca=j.b;
		dfs(j.a);
		for(auto i:pp2){
			if(tt[i]==0){
				vector<int> ff={uu[i],vv[i]};
				for(auto ii:ff){
					//if(uu[i]==ii or vv[i]==ii){
						vector<pair<int,int>> ne;
						for(auto jj:adj[ii]){
							if(jj.b!=i){
								ne.pb(jj);
							}
						}
						adj[ii]=ne;
					//}
				}
				adj[j.a].pb({j.b,ind5[j.a][j.b]});
				adj[j.b].pb({j.a,ind5[j.a][j.b]});
				break;
			}
		}
	}
	vector<int> qq;
	for(int i=0;i<n;i++){
		for(auto j:adj[i]){
			if(j.a>i){
				qq.pb(j.b);
			}
		}
	}




	/*cout<<11<<endl;
	for(auto i:cur){
		cout<<i.a<<"::"<<i.b<<endl;
	}*/
	/*for(int i=0;i<n;i++){
		vis[i]=0;
	}
	for(auto i:cur){
		vis[i.a]=1;
		vis[i.b]=1;
	}*/
/*	for(auto i:cur){
		cout<<i.a<<"::"<<i.b<<endl;
	}*/
	
	int xx=0;
	/*for(int i=1;i<n;i++){
		if(vis[i]==0){
			qq.pb(ind5[0][i]);

		}
	}
	for(auto i:cur){
		qq.pb(ind5[i.a][i.b]);
		qq.pb(ind5[0][i.a]);
	}*/
	for(auto j:qq){
		if(tt[j]==0){
			if(ans[j]==1){
				xx--;

			}
		}
	}
	/*for(auto j:qq){
		cout<<j<<".";
	}
	cout<<endl;*/
	xx+=ask(qq);
	count2++;
	//cout<<xx<<endl;
	//cout<<endl;
	
	//cout<<xx<<endl<<endl;

	return xx;

}
void solve(vector<pair<int,int>> xx,int val2){
	if(val2==0){
		return;
	}
	if(xx.size()==1){
		//f(xx[0].b>xx[0].a+1 and xx[0].a!=0){
			ans[ind5[xx[0].a][xx[0].b]]=1;
			ans2.pb(ind5[xx[0].a][xx[0].b]);
		//}
	}
	else{
		vector<pair<int,int>> yy;
		vector<pair<int,int>> zz;
		for(int i=0;i<xx.size()/2;i++){
			yy.pb(xx[i]);
		}
		for(int i=xx.size()/2;i<xx.size();i++){
			zz.pb(xx[i]);
		}
		int val3=ask2(yy);
		solve(yy,val3);
		solve(zz,val2-val3);
	}
}

vector<int> find_roads(int nnn,vector<int> uuu,vector<int> vvv) {
	uu=uuu;
	vv=vvv;
	int m=uu.size();

	n=nnn;
	/*if(nnn<=240){
		return  find_roads2(n,uu,vv);
	}*/
	count3=0;
	count2=0;
	for(int i=0;i<n;i++){
		par[i]=i;
		par2[i]=i;
	}
	vector<pair<pair<int,int>,int>> cur;
	vector<pair<pair<int,int>,int>> cur2;
	vector<pair<pair<int,int>,int>> cur3;
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			ind5[i][j]=-1;
		}
	}
	for(int i=0;i<m;i++){
		ans.pb(0);
	}
	for(int i=0;i<m;i++){
		if(uu[i]>vv[i]){
			swap(uu[i],vv[i]);
		}
		ind5[uu[i]][vv[i]]=i;
		int x=find(uu[i]);
		int y=find(vv[i]);
		/*if(uu[i]!=0){
			if(abs(uu[i]-vv[i])>1){
				continue;
			}
		}*/
		if(x!=y){
			par[x]=y;
			tt[i]=0;
			cur.pb({{uu[i],vv[i]},i});
			adj[uu[i]].pb({vv[i],i});
			adj[vv[i]].pb({uu[i],i});
		}
		else{
			x=find2(uu[i]);
			y=find2(vv[i]);
			if(x!=y){
				tt[i]=1;
				par2[x]=y;
				cur2.pb({{uu[i],vv[i]},i});
			}
			else{
				tt[i]=2;
				cur3.pb({{uu[i],vv[i]},i});
				ans[i]=-2;
			}
		}
	}
	//mt19937 rng;
	//rng=mt19937(chrono::steady_clock::now().time_since_epoch().count());
	int val;
	vector<int> ee;
	for(auto j:cur){
		ee.pb(j.b);
	}
	val=ask(ee);
	count2++;
	
	/*for(int i=0;i<m;i++){
		if(uu[i]!=0){
			if(abs(uu[i]-vv[i])>1){
				ans.pb(-2);
				continue;
			}
		}
		ans.pb(0);
	}*/

	for(auto j:cur2){

		ca=j.a.b;
		dfs(j.a.a);
		int cur=-1;
		for(auto i:pp2){
			if(ans[i]!=0){
				cur=i;
			}
		}
	/*	for(auto i:pp2){
			cout<<i<<",";
		}
		cout<<endl;*/
		if(cur==-1){
			vector<pair<int,int>> xx;
			xx.pb({val,j.b});
			for(auto i:pp2){
				vector<int> ff;
				for(auto jj:ee){
					if(jj!=i){
						ff.pb(jj);
					}
				}
				ff.pb(j.b);
				int val2=ask(ff);
				count2++;
				xx.pb({val2,i});
			}
			sort(xx.begin(),xx.end());
			for(int i=0;i<xx.size();i++){
				if(xx[i].a==xx.back().a-1){
					ans[xx[i].b]=1;
				}
				else{
					ans[xx[i].b]=-1;
				}
			}
			/*for(auto j:xx){
				cout<<j.a<<"::"<<j.b<<endl;
			}
			cout<<endl;*/
		}
		else{
			if(true){
				vector<int> ff;
				for(auto jj:ee){
					if(jj!=cur){
						ff.pb(jj);
					}
				}
				ff.pb(j.b);
				int val2=ask(ff);
				count2++;
				int xx=val;
				if(ans[cur]==1){
					xx--;
				}
				if(val2==xx){
					ans[j.b]=-1;
				}
				else{
					ans[j.b]=1;
				}
			}
			for(auto i:pp2){
				if(ans[i]!=0){
					continue;
				}
				vector<int> ff;
				for(auto jj:ee){
					if(jj!=i){
						ff.pb(jj);
					}
				}
				ff.pb(j.b);
				int val2=ask(ff);
				count2++;
				int xx=val;
				if(ans[j.b]==1){
					xx+=1;
				}
				if(val2==xx){
					ans[i]=-1;
				}
				else{	
					ans[i]=1;
				}
			}
		}
	/*	for(auto i:ans){
			cout<<i<<".";
		}
		cout<<endl;*/

	}
	vector<vector<pair<int,int>>> qq;
	for(int i=1;i<=256;i*=2){
		vector<vector<int>> aa;
		vector<vector<int>> bb;
		for(int j=0;j<512;j+=i){
			vector<int> cc;
			for(int k=j;k<j+i;k++){
				cc.pb(k);
			}
			if((j/i)%2==0){
				aa.pb(cc);
			}
			else{
				bb.pb(cc);
			}
		}
		for(int j=0;j<i;j++){
			for(int k=0;k<bb.size();k++){
				vector<int> dd;
				for(int ii=1;ii<i;ii++){
					dd.pb(bb[k][ii]);
				}
				dd.pb(bb[k][0]);
				bb[k]=dd;
			}
			vector<pair<int,int>> rr;
			for(int k=0;k<aa.size();k++){
				for(int l=0;l<aa[k].size();l++){
					rr.pb({aa[k][l],bb[k][l]});
				}
			}
			qq.pb(rr);
		}
	}

	
	
	for(int i=0;i<m;i++){
		if(ans[i]==0){
			ans[i]=1;
		}
		if(ans[i]==1){
			ans2.pb(i);
		}
		//cout<<ans[i]<<":";
	}
	//cout<<endl;
	//cout<<cur3.size()<<endl;
	for(auto j:qq){
		vector<pair<int,int>> cur;

		for(auto i:j){
			if(i.a<n and i.b<n){
				/*if(i.a==2 and i.b==3){
					cout<<11<<endl;
				}*/
				if(ind5[i.a][i.b]!=-1){
					if(ans[ind5[i.a][i.b]]==-2){
						cur.pb(i);
					}
				}
			}
		}
		if(cur.size()){
		/*	for(auto i:cur){
				cout<<i.a<<"::"<<i.b<<endl;
			}
			cout<<endl;*/
			solve(cur,ask2(cur));
		}
	}
/*	 for(int i=0;i<m;i++){
		cout<<ans[i]<<":";
	 }
	 cout<<endl;
*/
	assert(count3<=8000);
	//cout<<count3<<endl;
	return ans2;



/*	shuffle(cur2.begin(),cur2.end(),rng);
	for(auto j:cur2){
		if(val==n-1){
			break;
		}
		for(int i=0;i<n;i++){
			adj[i].clear();
		}
		for(auto i:cur){
			adj[i.a.a].pb({i.a.b,i.b});
			adj[i.a.b].pb({i.a.a,i.b});
		}
		ca=j.a.b;
		dfs(j.a.a);
		shuffle(pp2.begin(),pp2.end(),rng);
		for(auto i:pp2){
			vector<int> ff;
			for(auto jj:ee){
				if(jj!=i){
					ff.pb(jj);
				}
			}
			ff.pb(j.b);
			int val2=ask(ff);
			if(val2<val){
				break;
			}
			if(val2==val){
				continue;
			}
			vector<pair<pair<int,int>,int>> cur3;
			for(auto ii:cur){
				if(ii.b==i){
					continue;
				}
				cur3.pb(ii);
			}
			cur3.pb(j);
			cur=cur3;
			val=val2;
			ee=ff;
			break;
		}
	}*/
//	return ee;
}

Compilation message

simurgh.cpp: In function 'int ask2(std::vector<std::pair<int, int> >)':
simurgh.cpp:65:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |  for(int i=0;i<uu.size();i++){
      |              ~^~~~~~~~~~
simurgh.cpp: In function 'void solve(std::vector<std::pair<int, int> >, int)':
simurgh.cpp:167:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  167 |   for(int i=0;i<xx.size()/2;i++){
      |               ~^~~~~~~~~~~~
simurgh.cpp:170:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |   for(int i=xx.size()/2;i<xx.size();i++){
      |                         ~^~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:289:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  289 |    for(int i=0;i<xx.size();i++){
      |                ~^~~~~~~~~~
simurgh.cpp:372:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  372 |    for(int k=0;k<bb.size();k++){
      |                ~^~~~~~~~~~
simurgh.cpp:381:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  381 |    for(int k=0;k<aa.size();k++){
      |                ~^~~~~~~~~~
simurgh.cpp:382:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  382 |     for(int l=0;l<aa[k].size();l++){
      |                 ~^~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1356 KB correct
2 Correct 4 ms 1356 KB correct
3 Correct 4 ms 1364 KB correct
4 Correct 4 ms 1356 KB correct
5 Correct 4 ms 1356 KB correct
6 Correct 4 ms 1356 KB correct
7 Correct 4 ms 1356 KB correct
8 Correct 4 ms 1356 KB correct
9 Correct 4 ms 1356 KB correct
10 Correct 6 ms 1356 KB correct
11 Correct 4 ms 1356 KB correct
12 Correct 4 ms 1356 KB correct
13 Correct 4 ms 1356 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1356 KB correct
2 Correct 4 ms 1356 KB correct
3 Correct 4 ms 1364 KB correct
4 Correct 4 ms 1356 KB correct
5 Correct 4 ms 1356 KB correct
6 Correct 4 ms 1356 KB correct
7 Correct 4 ms 1356 KB correct
8 Correct 4 ms 1356 KB correct
9 Correct 4 ms 1356 KB correct
10 Correct 6 ms 1356 KB correct
11 Correct 4 ms 1356 KB correct
12 Correct 4 ms 1356 KB correct
13 Correct 4 ms 1356 KB correct
14 Correct 9 ms 1484 KB correct
15 Correct 8 ms 1552 KB correct
16 Correct 8 ms 1484 KB correct
17 Correct 9 ms 1488 KB correct
18 Correct 6 ms 1484 KB correct
19 Correct 7 ms 1484 KB correct
20 Correct 7 ms 1404 KB correct
21 Correct 7 ms 1484 KB correct
22 Correct 6 ms 1484 KB correct
23 Correct 6 ms 1484 KB correct
24 Correct 6 ms 1484 KB correct
25 Correct 4 ms 1484 KB correct
26 Correct 7 ms 1484 KB correct
27 Correct 6 ms 1488 KB correct
28 Correct 5 ms 1484 KB correct
29 Correct 5 ms 1496 KB correct
30 Correct 7 ms 1484 KB correct
31 Correct 6 ms 1484 KB correct
32 Correct 6 ms 1484 KB correct
33 Correct 8 ms 1484 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1356 KB correct
2 Correct 4 ms 1356 KB correct
3 Correct 4 ms 1364 KB correct
4 Correct 4 ms 1356 KB correct
5 Correct 4 ms 1356 KB correct
6 Correct 4 ms 1356 KB correct
7 Correct 4 ms 1356 KB correct
8 Correct 4 ms 1356 KB correct
9 Correct 4 ms 1356 KB correct
10 Correct 6 ms 1356 KB correct
11 Correct 4 ms 1356 KB correct
12 Correct 4 ms 1356 KB correct
13 Correct 4 ms 1356 KB correct
14 Correct 9 ms 1484 KB correct
15 Correct 8 ms 1552 KB correct
16 Correct 8 ms 1484 KB correct
17 Correct 9 ms 1488 KB correct
18 Correct 6 ms 1484 KB correct
19 Correct 7 ms 1484 KB correct
20 Correct 7 ms 1404 KB correct
21 Correct 7 ms 1484 KB correct
22 Correct 6 ms 1484 KB correct
23 Correct 6 ms 1484 KB correct
24 Correct 6 ms 1484 KB correct
25 Correct 4 ms 1484 KB correct
26 Correct 7 ms 1484 KB correct
27 Correct 6 ms 1488 KB correct
28 Correct 5 ms 1484 KB correct
29 Correct 5 ms 1496 KB correct
30 Correct 7 ms 1484 KB correct
31 Correct 6 ms 1484 KB correct
32 Correct 6 ms 1484 KB correct
33 Correct 8 ms 1484 KB correct
34 Correct 275 ms 3144 KB correct
35 Correct 267 ms 3020 KB correct
36 Correct 190 ms 2724 KB correct
37 Correct 20 ms 1908 KB correct
38 Correct 274 ms 3100 KB correct
39 Correct 240 ms 2900 KB correct
40 Correct 191 ms 2636 KB correct
41 Correct 333 ms 3100 KB correct
42 Correct 312 ms 3016 KB correct
43 Correct 82 ms 2468 KB correct
44 Correct 68 ms 2340 KB correct
45 Correct 80 ms 2468 KB correct
46 Correct 60 ms 2320 KB correct
47 Correct 32 ms 1996 KB correct
48 Correct 7 ms 1868 KB correct
49 Correct 15 ms 1868 KB correct
50 Correct 32 ms 2036 KB correct
51 Correct 77 ms 2524 KB correct
52 Correct 69 ms 2424 KB correct
53 Correct 60 ms 2340 KB correct
54 Correct 86 ms 2588 KB correct
55 Correct 76 ms 2588 KB correct
56 Correct 76 ms 2468 KB correct
57 Correct 77 ms 2504 KB correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1356 KB correct
2 Correct 5 ms 1356 KB correct
3 Correct 1224 ms 5796 KB correct
4 Correct 2481 ms 7864 KB correct
5 Correct 2505 ms 8016 KB correct
6 Correct 2782 ms 7832 KB correct
7 Correct 2828 ms 7952 KB correct
8 Correct 2863 ms 7988 KB correct
9 Correct 2503 ms 7856 KB correct
10 Correct 2529 ms 7824 KB correct
11 Correct 2566 ms 7824 KB correct
12 Correct 2501 ms 7868 KB correct
13 Correct 4 ms 1356 KB correct
14 Correct 2488 ms 7860 KB correct
15 Correct 2484 ms 7944 KB correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1356 KB correct
2 Correct 4 ms 1356 KB correct
3 Correct 4 ms 1364 KB correct
4 Correct 4 ms 1356 KB correct
5 Correct 4 ms 1356 KB correct
6 Correct 4 ms 1356 KB correct
7 Correct 4 ms 1356 KB correct
8 Correct 4 ms 1356 KB correct
9 Correct 4 ms 1356 KB correct
10 Correct 6 ms 1356 KB correct
11 Correct 4 ms 1356 KB correct
12 Correct 4 ms 1356 KB correct
13 Correct 4 ms 1356 KB correct
14 Correct 9 ms 1484 KB correct
15 Correct 8 ms 1552 KB correct
16 Correct 8 ms 1484 KB correct
17 Correct 9 ms 1488 KB correct
18 Correct 6 ms 1484 KB correct
19 Correct 7 ms 1484 KB correct
20 Correct 7 ms 1404 KB correct
21 Correct 7 ms 1484 KB correct
22 Correct 6 ms 1484 KB correct
23 Correct 6 ms 1484 KB correct
24 Correct 6 ms 1484 KB correct
25 Correct 4 ms 1484 KB correct
26 Correct 7 ms 1484 KB correct
27 Correct 6 ms 1488 KB correct
28 Correct 5 ms 1484 KB correct
29 Correct 5 ms 1496 KB correct
30 Correct 7 ms 1484 KB correct
31 Correct 6 ms 1484 KB correct
32 Correct 6 ms 1484 KB correct
33 Correct 8 ms 1484 KB correct
34 Correct 275 ms 3144 KB correct
35 Correct 267 ms 3020 KB correct
36 Correct 190 ms 2724 KB correct
37 Correct 20 ms 1908 KB correct
38 Correct 274 ms 3100 KB correct
39 Correct 240 ms 2900 KB correct
40 Correct 191 ms 2636 KB correct
41 Correct 333 ms 3100 KB correct
42 Correct 312 ms 3016 KB correct
43 Correct 82 ms 2468 KB correct
44 Correct 68 ms 2340 KB correct
45 Correct 80 ms 2468 KB correct
46 Correct 60 ms 2320 KB correct
47 Correct 32 ms 1996 KB correct
48 Correct 7 ms 1868 KB correct
49 Correct 15 ms 1868 KB correct
50 Correct 32 ms 2036 KB correct
51 Correct 77 ms 2524 KB correct
52 Correct 69 ms 2424 KB correct
53 Correct 60 ms 2340 KB correct
54 Correct 86 ms 2588 KB correct
55 Correct 76 ms 2588 KB correct
56 Correct 76 ms 2468 KB correct
57 Correct 77 ms 2504 KB correct
58 Correct 5 ms 1356 KB correct
59 Correct 5 ms 1356 KB correct
60 Correct 1224 ms 5796 KB correct
61 Correct 2481 ms 7864 KB correct
62 Correct 2505 ms 8016 KB correct
63 Correct 2782 ms 7832 KB correct
64 Correct 2828 ms 7952 KB correct
65 Correct 2863 ms 7988 KB correct
66 Correct 2503 ms 7856 KB correct
67 Correct 2529 ms 7824 KB correct
68 Correct 2566 ms 7824 KB correct
69 Correct 2501 ms 7868 KB correct
70 Correct 4 ms 1356 KB correct
71 Correct 2488 ms 7860 KB correct
72 Correct 2484 ms 7944 KB correct
73 Correct 4 ms 1392 KB correct
74 Correct 2479 ms 7936 KB correct
75 Correct 2384 ms 7732 KB correct
76 Correct 712 ms 4408 KB correct
77 Correct 2474 ms 8880 KB correct
78 Correct 2506 ms 8756 KB correct
79 Correct 2471 ms 8828 KB correct
80 Correct 2386 ms 8676 KB correct
81 Correct 2324 ms 7624 KB correct
82 Correct 2422 ms 8628 KB correct
83 Correct 1284 ms 5732 KB correct
84 Correct 727 ms 6176 KB correct
85 Correct 659 ms 5736 KB correct
86 Correct 474 ms 4664 KB correct
87 Correct 335 ms 3904 KB correct
88 Correct 269 ms 3656 KB correct
89 Correct 250 ms 3520 KB correct
90 Correct 215 ms 3412 KB correct
91 Correct 47 ms 2500 KB correct
92 Correct 17 ms 2380 KB correct
93 Correct 663 ms 5820 KB correct
94 Correct 476 ms 4660 KB correct
95 Correct 441 ms 4536 KB correct
96 Correct 230 ms 3440 KB correct
97 Correct 271 ms 3760 KB correct
98 Correct 333 ms 3916 KB correct
99 Correct 281 ms 3744 KB correct
100 Correct 85 ms 2636 KB correct
101 Correct 18 ms 2428 KB correct
102 Correct 631 ms 5644 KB correct
103 Correct 622 ms 5624 KB correct
104 Correct 620 ms 5604 KB correct
105 Correct 622 ms 5752 KB correct