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Submission #283819

# Submission time Handle Problem Language Result Execution time Memory
283819 2020-08-26T07:36:36 Z emanIaicepsa Simurgh (IOI17_simurgh) C++14
51 / 100
 323 ms 3308 KB 
#include "simurgh.h"
#include<bits/stdc++.h>
#define pb emplace_back
#define vi vector<int>
#define pii pair<int,int>
#define fi first
#define se second
#define all(n) (n).begin(),(n).end()
using namespace std;
 
vi ans, pos, pos2, U, V;
 
int pa[505], N, M, dead[250005];
void init(){
	for(int i=0;i<N;i++) pa[i] = i;
}
int fp(int x){
	if(pa[x] == x) return x;
	return pa[x] = fp(pa[x]);
}
void uni(int x,int y){
	x = fp(x), y = fp(y);
	assert(x != y);
	pa[x] = y;
}
 
void search_next(){
	init();
	random_shuffle(all(pos));
	int cnt = N;
	vi cur;
	for(auto &i:ans){
		uni(U[i], V[i]);
		cur.pb(i);
		cnt--;
	}
	vector<pii> tried;
	for(auto &i:pos){
		if(dead[i]) continue;
		if(cnt == 2){
			if(fp(U[i]) != fp(V[i])){
				cur.pb(i);
				assert(cur.size() == N-1);
				int common = count_common_roads(cur); 
				/* cout<<common<<" "<<i<<'\n'; */
				tried.pb(common,i);
				cur.pop_back();
			}
			else pos2.pb(i);
		}
		else{
			if(fp(U[i]) != fp(V[i])){
				cur.pb(i);
				uni(U[i], V[i]);
				cnt--;
			}
			pos2.pb(i);
		}
	}
	pair<int,int> mx = *max_element(all(tried));
	if(mx.fi == (int)ans.size() - 1){
		for(auto i:cur) dead[i] = 1;
	}
	for(auto &x : tried){
		if(x.fi == mx.fi){
			ans.pb(x.se);
		}
	}
	swap(pos, pos2);
	pos2.clear();
	/* for(auto i:pos) cout<<i<<" "; cout<<'\n'; */
}
// count_common_roads(vi v);
 
std::vector<int> find_roads(int n, std::vector<int> u, std::vector<int> v) {
	srand(time(0));
	M = u.size(), N = n;
	U = u, V = v;
	for(int i=0;i<M;i++) pos.pb(i);
	while(ans.size() < N - 1) search_next();
	/* for(auto i:ans) cout<<i<<" "; cout<<'\n'; */
	return ans;
}

Compilation message

In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from simurgh.cpp:2:
simurgh.cpp: In function 'void search_next()':
simurgh.cpp:43:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |     assert(cur.size() == N-1);
      |            ~~~~~~~~~~~^~~~~~
simurgh.cpp: In function 'std::vector<int> find_roads(int, std::vector<int>, std::vector<int>)':
simurgh.cpp:80:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   80 |  while(ans.size() < N - 1) search_next();
      |        ~~~~~~~~~~~^~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB correct
2 Correct 0 ms 256 KB correct
3 Correct 1 ms 256 KB correct
4 Correct 0 ms 256 KB correct
5 Correct 0 ms 256 KB correct
6 Correct 0 ms 256 KB correct
7 Correct 1 ms 256 KB correct
8 Correct 0 ms 256 KB correct
9 Correct 0 ms 256 KB correct
10 Correct 0 ms 256 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 1 ms 256 KB correct
13 Correct 0 ms 256 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB correct
2 Correct 0 ms 256 KB correct
3 Correct 1 ms 256 KB correct
4 Correct 0 ms 256 KB correct
5 Correct 0 ms 256 KB correct
6 Correct 0 ms 256 KB correct
7 Correct 1 ms 256 KB correct
8 Correct 0 ms 256 KB correct
9 Correct 0 ms 256 KB correct
10 Correct 0 ms 256 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 1 ms 256 KB correct
13 Correct 0 ms 256 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 1 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 256 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB correct
2 Correct 0 ms 256 KB correct
3 Correct 1 ms 256 KB correct
4 Correct 0 ms 256 KB correct
5 Correct 0 ms 256 KB correct
6 Correct 0 ms 256 KB correct
7 Correct 1 ms 256 KB correct
8 Correct 0 ms 256 KB correct
9 Correct 0 ms 256 KB correct
10 Correct 0 ms 256 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 1 ms 256 KB correct
13 Correct 0 ms 256 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 1 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 256 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct
34 Correct 284 ms 1412 KB correct
35 Correct 275 ms 1280 KB correct
36 Correct 183 ms 1144 KB correct
37 Correct 14 ms 384 KB correct
38 Correct 275 ms 1528 KB correct
39 Correct 237 ms 1272 KB correct
40 Correct 194 ms 1024 KB correct
41 Correct 323 ms 1528 KB correct
42 Correct 293 ms 1408 KB correct
43 Correct 142 ms 896 KB correct
44 Correct 112 ms 768 KB correct
45 Correct 131 ms 896 KB correct
46 Correct 113 ms 932 KB correct
47 Correct 44 ms 564 KB correct
48 Correct 7 ms 384 KB correct
49 Correct 15 ms 384 KB correct
50 Correct 45 ms 560 KB correct
51 Correct 130 ms 1016 KB correct
52 Correct 114 ms 768 KB correct
53 Correct 98 ms 768 KB correct
54 Correct 140 ms 1016 KB correct
55 Correct 133 ms 1016 KB correct
56 Correct 127 ms 1016 KB correct
57 Correct 129 ms 916 KB correct

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB correct
2 Correct 1 ms 256 KB correct
3 Incorrect 297 ms 3308 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 256 KB correct
2 Correct 0 ms 256 KB correct
3 Correct 1 ms 256 KB correct
4 Correct 0 ms 256 KB correct
5 Correct 0 ms 256 KB correct
6 Correct 0 ms 256 KB correct
7 Correct 1 ms 256 KB correct
8 Correct 0 ms 256 KB correct
9 Correct 0 ms 256 KB correct
10 Correct 0 ms 256 KB correct
11 Correct 0 ms 256 KB correct
12 Correct 1 ms 256 KB correct
13 Correct 0 ms 256 KB correct
14 Correct 3 ms 384 KB correct
15 Correct 1 ms 384 KB correct
16 Correct 3 ms 384 KB correct
17 Correct 2 ms 384 KB correct
18 Correct 1 ms 384 KB correct
19 Correct 2 ms 384 KB correct
20 Correct 2 ms 384 KB correct
21 Correct 2 ms 384 KB correct
22 Correct 2 ms 384 KB correct
23 Correct 2 ms 384 KB correct
24 Correct 2 ms 384 KB correct
25 Correct 1 ms 256 KB correct
26 Correct 2 ms 384 KB correct
27 Correct 2 ms 384 KB correct
28 Correct 1 ms 384 KB correct
29 Correct 1 ms 384 KB correct
30 Correct 2 ms 384 KB correct
31 Correct 2 ms 384 KB correct
32 Correct 2 ms 384 KB correct
33 Correct 2 ms 384 KB correct
34 Correct 284 ms 1412 KB correct
35 Correct 275 ms 1280 KB correct
36 Correct 183 ms 1144 KB correct
37 Correct 14 ms 384 KB correct
38 Correct 275 ms 1528 KB correct
39 Correct 237 ms 1272 KB correct
40 Correct 194 ms 1024 KB correct
41 Correct 323 ms 1528 KB correct
42 Correct 293 ms 1408 KB correct
43 Correct 142 ms 896 KB correct
44 Correct 112 ms 768 KB correct
45 Correct 131 ms 896 KB correct
46 Correct 113 ms 932 KB correct
47 Correct 44 ms 564 KB correct
48 Correct 7 ms 384 KB correct
49 Correct 15 ms 384 KB correct
50 Correct 45 ms 560 KB correct
51 Correct 130 ms 1016 KB correct
52 Correct 114 ms 768 KB correct
53 Correct 98 ms 768 KB correct
54 Correct 140 ms 1016 KB correct
55 Correct 133 ms 1016 KB correct
56 Correct 127 ms 1016 KB correct
57 Correct 129 ms 916 KB correct
58 Correct 1 ms 256 KB correct
59 Correct 1 ms 256 KB correct
60 Incorrect 297 ms 3308 KB WA in grader: NO
61 Halted 0 ms 0 KB -