oj.uz

Submission #399866

# Submission time Handle Problem Language Result Execution time Memory
399866 2021-05-06T18:33:23 Z kshitij_sodani Simurgh (IOI17_simurgh) C++14
51 / 100
 297 ms 3940 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 count_common_roads
#include "simurgh.h"
int par[501];
vector<pair<int,int>> adj[501];
int find(int no){
	if(par[no]==no){
		return no;
	}
	par[no]=find(par[no]);
	return par[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> find_roads(int n,vector<int> uu,vector<int> vv) {
	int m=uu.size();
	for(int i=0;i<n;i++){
		par[i]=i;
	}
	vector<pair<pair<int,int>,int>> cur;
	vector<pair<pair<int,int>,int>> cur2;
	for(int i=0;i<m;i++){
		int x=find(uu[i]);
		int y=find(vv[i]);
		if(x!=y){
			par[x]=y;
			cur.pb({{uu[i],vv[i]},i});
			adj[uu[i]].pb({vv[i],i});
			adj[vv[i]].pb({uu[i],i});
		}
		else{
			cur2.pb({{uu[i],vv[i]},i});
		}
	}
	//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);
	vector<int> ans;
	for(int i=0;i<m;i++){
		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);
				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);
				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);
				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<int> ans2;
	for(int i=0;i<m;i++){
		if(ans[i]==1 or ans[i]==0){
			ans2.pb(i);
		}
	}
	// for(int i=0;i<m;i++){
	// 	cout<<ans[i]<<":";
	// }
	// cout<<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 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:99:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   99 |    for(int i=0;i<xx.size();i++){
      |                ~^~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Correct 1 ms 204 KB correct
4 Correct 1 ms 308 KB correct
5 Correct 1 ms 204 KB correct
6 Correct 1 ms 312 KB correct
7 Correct 1 ms 208 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Correct 1 ms 204 KB correct
4 Correct 1 ms 308 KB correct
5 Correct 1 ms 204 KB correct
6 Correct 1 ms 312 KB correct
7 Correct 1 ms 208 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 4 ms 332 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 4 ms 336 KB correct
17 Correct 3 ms 332 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 3 ms 332 KB correct
20 Correct 4 ms 332 KB correct
21 Correct 3 ms 312 KB correct
22 Correct 4 ms 332 KB correct
23 Correct 3 ms 336 KB correct
24 Correct 2 ms 308 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 3 ms 332 KB correct
27 Correct 2 ms 316 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 2 ms 332 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Correct 1 ms 204 KB correct
4 Correct 1 ms 308 KB correct
5 Correct 1 ms 204 KB correct
6 Correct 1 ms 312 KB correct
7 Correct 1 ms 208 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 4 ms 332 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 4 ms 336 KB correct
17 Correct 3 ms 332 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 3 ms 332 KB correct
20 Correct 4 ms 332 KB correct
21 Correct 3 ms 312 KB correct
22 Correct 4 ms 332 KB correct
23 Correct 3 ms 336 KB correct
24 Correct 2 ms 308 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 3 ms 332 KB correct
27 Correct 2 ms 316 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 2 ms 332 KB correct
34 Correct 295 ms 1560 KB correct
35 Correct 287 ms 1604 KB correct
36 Correct 197 ms 1164 KB correct
37 Correct 15 ms 332 KB correct
38 Correct 295 ms 1448 KB correct
39 Correct 266 ms 1388 KB correct
40 Correct 195 ms 1164 KB correct
41 Correct 297 ms 1472 KB correct
42 Correct 294 ms 1488 KB correct
43 Correct 148 ms 964 KB correct
44 Correct 120 ms 844 KB correct
45 Correct 151 ms 912 KB correct
46 Correct 108 ms 844 KB correct
47 Correct 42 ms 560 KB correct
48 Correct 3 ms 332 KB correct
49 Correct 12 ms 400 KB correct
50 Correct 45 ms 564 KB correct
51 Correct 142 ms 888 KB correct
52 Correct 122 ms 872 KB correct
53 Correct 112 ms 844 KB correct
54 Correct 155 ms 968 KB correct
55 Correct 137 ms 908 KB correct
56 Correct 132 ms 952 KB correct
57 Correct 130 ms 944 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Incorrect 242 ms 3940 KB WA in grader: NO
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB correct
2 Correct 1 ms 204 KB correct
3 Correct 1 ms 204 KB correct
4 Correct 1 ms 308 KB correct
5 Correct 1 ms 204 KB correct
6 Correct 1 ms 312 KB correct
7 Correct 1 ms 208 KB correct
8 Correct 1 ms 204 KB correct
9 Correct 1 ms 204 KB correct
10 Correct 1 ms 204 KB correct
11 Correct 1 ms 204 KB correct
12 Correct 1 ms 204 KB correct
13 Correct 1 ms 204 KB correct
14 Correct 4 ms 332 KB correct
15 Correct 4 ms 332 KB correct
16 Correct 4 ms 336 KB correct
17 Correct 3 ms 332 KB correct
18 Correct 2 ms 332 KB correct
19 Correct 3 ms 332 KB correct
20 Correct 4 ms 332 KB correct
21 Correct 3 ms 312 KB correct
22 Correct 4 ms 332 KB correct
23 Correct 3 ms 336 KB correct
24 Correct 2 ms 308 KB correct
25 Correct 1 ms 204 KB correct
26 Correct 3 ms 332 KB correct
27 Correct 2 ms 316 KB correct
28 Correct 1 ms 204 KB correct
29 Correct 1 ms 208 KB correct
30 Correct 2 ms 332 KB correct
31 Correct 2 ms 332 KB correct
32 Correct 2 ms 332 KB correct
33 Correct 2 ms 332 KB correct
34 Correct 295 ms 1560 KB correct
35 Correct 287 ms 1604 KB correct
36 Correct 197 ms 1164 KB correct
37 Correct 15 ms 332 KB correct
38 Correct 295 ms 1448 KB correct
39 Correct 266 ms 1388 KB correct
40 Correct 195 ms 1164 KB correct
41 Correct 297 ms 1472 KB correct
42 Correct 294 ms 1488 KB correct
43 Correct 148 ms 964 KB correct
44 Correct 120 ms 844 KB correct
45 Correct 151 ms 912 KB correct
46 Correct 108 ms 844 KB correct
47 Correct 42 ms 560 KB correct
48 Correct 3 ms 332 KB correct
49 Correct 12 ms 400 KB correct
50 Correct 45 ms 564 KB correct
51 Correct 142 ms 888 KB correct
52 Correct 122 ms 872 KB correct
53 Correct 112 ms 844 KB correct
54 Correct 155 ms 968 KB correct
55 Correct 137 ms 908 KB correct
56 Correct 132 ms 952 KB correct
57 Correct 130 ms 944 KB correct
58 Correct 1 ms 204 KB correct
59 Correct 1 ms 204 KB correct
60 Incorrect 242 ms 3940 KB WA in grader: NO
61 Halted 0 ms 0 KB -