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Submission #103476

# Submission time Handle Problem Language Result Execution time Memory
103476 2019-03-30T19:49:03 Z figter001 Simurgh (IOI17_simurgh) C++17
30 / 100
 3000 ms 3968 KB 
#include "simurgh.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const int nax = 510;

int dsu[nax];
int m,n;
vector<pair<int,int>> g[nax];
vector<int> u,v;

int find(int u){
	return u == dsu[u] ? u : dsu[u] = find(dsu[u]);
}

bool good(vector<int> ans){
	for(int i=0;i<n;i++)
		dsu[i] = i;
	for(int i=0;i<ans.size();i++){
		int id = ans[i];
		int a = u[id];
		int b = v[id];
		if(find(a) == find(b))
			continue;
		dsu[find(b)] = find(a);
	}
	for(int i=0;i<n;i++)
		if(find(i) != find(0))
			return 0;
	return 1;
}

vector<int> find_roads(int N, vector<int> U, vector<int> V) {
	vector<int> ans;
	u = U;
	v = V;
	n = N;
	m = u.size();

	for(int i=0;i<n;i++)
		dsu[i] = i;

	int lst;
	for(int i=0;i<m;i++){
		int a = u[i];
		int b = v[i];
		g[a].push_back({b,i});
		g[b].push_back({a,i});
		if(find(a) == find(b))
			continue;
		ans.push_back(i);
		dsu[find(b)] = find(a);
	}
	lst = count_common_roads(ans);
	for(int i=0;i<ans.size();i++){
		int id = ans[i];
		int a = u[id];
		int b = v[id];
		for(int j=0;j<m;j++){
			ans[i] = j;
			if(good(ans) == 1){
				int r = count_common_roads(ans);
				if(r < lst){
					ans[i] = id;
					break;
				}
				if(r > lst){
					lst = r;
					break;
				}
			}
			ans[i] = id;
		}
	}
	// for(int i : ans)
	// 	printf("%d ", i);
	// printf("\n");
	return ans;
}

Compilation message

simurgh.cpp: In function 'bool good(std::vector<int>)':
simurgh.cpp:23:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<ans.size();i++){
              ~^~~~~~~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:59:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<ans.size();i++){
              ~^~~~~~~~~~~
simurgh.cpp:61:7: warning: unused variable 'a' [-Wunused-variable]
   int a = u[id];
       ^
simurgh.cpp:62:7: warning: unused variable 'b' [-Wunused-variable]
   int b = v[id];
       ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 256 KB correct
4 Correct 2 ms 256 KB correct
5 Correct 2 ms 256 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 256 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 3 ms 384 KB correct
13 Correct 2 ms 384 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 256 KB correct
4 Correct 2 ms 256 KB correct
5 Correct 2 ms 256 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 256 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 3 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 35 ms 384 KB correct
15 Correct 34 ms 384 KB correct
16 Correct 39 ms 384 KB correct
17 Correct 24 ms 424 KB correct
18 Correct 9 ms 384 KB correct
19 Correct 30 ms 384 KB correct
20 Correct 31 ms 384 KB correct
21 Correct 31 ms 356 KB correct
22 Correct 5 ms 384 KB correct
23 Correct 5 ms 384 KB correct
24 Correct 5 ms 384 KB correct
25 Correct 4 ms 384 KB correct
26 Correct 5 ms 384 KB correct
27 Correct 6 ms 384 KB correct
28 Correct 6 ms 384 KB correct
29 Correct 5 ms 416 KB correct
30 Correct 4 ms 384 KB correct
31 Correct 5 ms 384 KB correct
32 Correct 5 ms 384 KB correct
33 Correct 4 ms 384 KB correct

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 256 KB correct
4 Correct 2 ms 256 KB correct
5 Correct 2 ms 256 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 256 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 3 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 35 ms 384 KB correct
15 Correct 34 ms 384 KB correct
16 Correct 39 ms 384 KB correct
17 Correct 24 ms 424 KB correct
18 Correct 9 ms 384 KB correct
19 Correct 30 ms 384 KB correct
20 Correct 31 ms 384 KB correct
21 Correct 31 ms 356 KB correct
22 Correct 5 ms 384 KB correct
23 Correct 5 ms 384 KB correct
24 Correct 5 ms 384 KB correct
25 Correct 4 ms 384 KB correct
26 Correct 5 ms 384 KB correct
27 Correct 6 ms 384 KB correct
28 Correct 6 ms 384 KB correct
29 Correct 5 ms 416 KB correct
30 Correct 4 ms 384 KB correct
31 Correct 5 ms 384 KB correct
32 Correct 5 ms 384 KB correct
33 Correct 4 ms 384 KB correct
34 Execution timed out 3014 ms 1664 KB Time limit exceeded
35 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB correct
2 Correct 2 ms 256 KB correct
3 Execution timed out 3028 ms 3968 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB correct
2 Correct 2 ms 384 KB correct
3 Correct 2 ms 256 KB correct
4 Correct 2 ms 256 KB correct
5 Correct 2 ms 256 KB correct
6 Correct 2 ms 384 KB correct
7 Correct 2 ms 384 KB correct
8 Correct 2 ms 256 KB correct
9 Correct 2 ms 384 KB correct
10 Correct 2 ms 384 KB correct
11 Correct 2 ms 384 KB correct
12 Correct 3 ms 384 KB correct
13 Correct 2 ms 384 KB correct
14 Correct 35 ms 384 KB correct
15 Correct 34 ms 384 KB correct
16 Correct 39 ms 384 KB correct
17 Correct 24 ms 424 KB correct
18 Correct 9 ms 384 KB correct
19 Correct 30 ms 384 KB correct
20 Correct 31 ms 384 KB correct
21 Correct 31 ms 356 KB correct
22 Correct 5 ms 384 KB correct
23 Correct 5 ms 384 KB correct
24 Correct 5 ms 384 KB correct
25 Correct 4 ms 384 KB correct
26 Correct 5 ms 384 KB correct
27 Correct 6 ms 384 KB correct
28 Correct 6 ms 384 KB correct
29 Correct 5 ms 416 KB correct
30 Correct 4 ms 384 KB correct
31 Correct 5 ms 384 KB correct
32 Correct 5 ms 384 KB correct
33 Correct 4 ms 384 KB correct
34 Execution timed out 3014 ms 1664 KB Time limit exceeded
35 Halted 0 ms 0 KB -