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Submission #1076174

# Submission time Handle Problem Language Result Execution time Memory
1076174 2024-08-26T11:35:00 Z Abito Simurgh (IOI17_simurgh) C++17
30 / 100
 2338 ms 2348 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
#define pb push_back
#define ask count_common_roads
using namespace std;
const int N=4e4+5;
int par[N],sz[N];
bool in[N],know[N];
int getpar(int x){
	if (x==par[x]) return x;
	return par[x]=getpar(par[x]);
}
bool link(int x,int y){
	x=getpar(x);
	y=getpar(y);
	if (x==y) return 0;
	if (sz[x]>sz[y]) swap(x,y);
	sz[y]+=sz[x];
	par[x]=y;
	return 1;
}
std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	int m=u.size();
	for (int i=0;i<m;i++) u[i]++,v[i]++;
	for (int i=1;i<=n;i++) sz[i]=1,par[i]=i;
	vector<int> r;
	for (int i=0;i<m;i++){
		if (link(u[i],v[i])) r.pb(i),in[i]=1;
	}
	int ans=ask(r);
	for (int i=0;i<m && ans<n-1;i++){
		if (!in[i] || know[i]) continue;
		int s=i;
		for (int j=i+1;j<m;j++){
			if (in[j] || know[j]) continue;
			vector<int> t;
			for (auto x:r) if (x!=i) t.pb(x);
			t.pb(j);
			for (int i=1;i<=n;i++) sz[i]=1,par[i]=i;
			int tree=0;
			for (auto x:t) tree+=link(u[x],v[x]);
			if (tree!=n-1) continue;
			int h=ask(t);
			if (h<=ans) continue;
			s=j;
			in[s]=1;
			in[i]=0;
			swap(r,t);
			ans=h;
			break;
		}
		know[s]=1;
	}	
	return r;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB correct
2 Correct 0 ms 348 KB correct
3 Correct 0 ms 348 KB correct
4 Correct 1 ms 348 KB correct
5 Correct 1 ms 348 KB correct
6 Correct 0 ms 344 KB correct
7 Correct 0 ms 348 KB correct
8 Correct 1 ms 348 KB correct
9 Correct 1 ms 348 KB correct
10 Correct 0 ms 348 KB correct
11 Correct 0 ms 348 KB correct
12 Correct 1 ms 348 KB correct
13 Correct 0 ms 348 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB correct
2 Correct 0 ms 348 KB correct
3 Correct 0 ms 348 KB correct
4 Correct 1 ms 348 KB correct
5 Correct 1 ms 348 KB correct
6 Correct 0 ms 344 KB correct
7 Correct 0 ms 348 KB correct
8 Correct 1 ms 348 KB correct
9 Correct 1 ms 348 KB correct
10 Correct 0 ms 348 KB correct
11 Correct 0 ms 348 KB correct
12 Correct 1 ms 348 KB correct
13 Correct 0 ms 348 KB correct
14 Correct 16 ms 344 KB correct
15 Correct 10 ms 348 KB correct
16 Correct 12 ms 488 KB correct
17 Correct 11 ms 480 KB correct
18 Correct 4 ms 348 KB correct
19 Correct 13 ms 348 KB correct
20 Correct 10 ms 348 KB correct
21 Correct 11 ms 348 KB correct
22 Correct 0 ms 360 KB correct
23 Correct 0 ms 348 KB correct
24 Correct 0 ms 348 KB correct
25 Correct 1 ms 348 KB correct
26 Correct 1 ms 604 KB correct
27 Correct 1 ms 348 KB correct
28 Correct 0 ms 444 KB correct
29 Correct 1 ms 344 KB correct
30 Correct 1 ms 344 KB correct
31 Correct 0 ms 348 KB correct
32 Correct 1 ms 348 KB correct
33 Correct 0 ms 348 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB correct
2 Correct 0 ms 348 KB correct
3 Correct 0 ms 348 KB correct
4 Correct 1 ms 348 KB correct
5 Correct 1 ms 348 KB correct
6 Correct 0 ms 344 KB correct
7 Correct 0 ms 348 KB correct
8 Correct 1 ms 348 KB correct
9 Correct 1 ms 348 KB correct
10 Correct 0 ms 348 KB correct
11 Correct 0 ms 348 KB correct
12 Correct 1 ms 348 KB correct
13 Correct 0 ms 348 KB correct
14 Correct 16 ms 344 KB correct
15 Correct 10 ms 348 KB correct
16 Correct 12 ms 488 KB correct
17 Correct 11 ms 480 KB correct
18 Correct 4 ms 348 KB correct
19 Correct 13 ms 348 KB correct
20 Correct 10 ms 348 KB correct
21 Correct 11 ms 348 KB correct
22 Correct 0 ms 360 KB correct
23 Correct 0 ms 348 KB correct
24 Correct 0 ms 348 KB correct
25 Correct 1 ms 348 KB correct
26 Correct 1 ms 604 KB correct
27 Correct 1 ms 348 KB correct
28 Correct 0 ms 444 KB correct
29 Correct 1 ms 344 KB correct
30 Correct 1 ms 344 KB correct
31 Correct 0 ms 348 KB correct
32 Correct 1 ms 348 KB correct
33 Correct 0 ms 348 KB correct
34 Incorrect 1626 ms 1104 KB WA in grader: NO
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB correct
2 Correct 0 ms 348 KB correct
3 Incorrect 2338 ms 2348 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 344 KB correct
2 Correct 0 ms 348 KB correct
3 Correct 0 ms 348 KB correct
4 Correct 1 ms 348 KB correct
5 Correct 1 ms 348 KB correct
6 Correct 0 ms 344 KB correct
7 Correct 0 ms 348 KB correct
8 Correct 1 ms 348 KB correct
9 Correct 1 ms 348 KB correct
10 Correct 0 ms 348 KB correct
11 Correct 0 ms 348 KB correct
12 Correct 1 ms 348 KB correct
13 Correct 0 ms 348 KB correct
14 Correct 16 ms 344 KB correct
15 Correct 10 ms 348 KB correct
16 Correct 12 ms 488 KB correct
17 Correct 11 ms 480 KB correct
18 Correct 4 ms 348 KB correct
19 Correct 13 ms 348 KB correct
20 Correct 10 ms 348 KB correct
21 Correct 11 ms 348 KB correct
22 Correct 0 ms 360 KB correct
23 Correct 0 ms 348 KB correct
24 Correct 0 ms 348 KB correct
25 Correct 1 ms 348 KB correct
26 Correct 1 ms 604 KB correct
27 Correct 1 ms 348 KB correct
28 Correct 0 ms 444 KB correct
29 Correct 1 ms 344 KB correct
30 Correct 1 ms 344 KB correct
31 Correct 0 ms 348 KB correct
32 Correct 1 ms 348 KB correct
33 Correct 0 ms 348 KB correct
34 Incorrect 1626 ms 1104 KB WA in grader: NO
35 Halted 0 ms 0 KB -