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Submission #649183

# Submission time Handle Problem Language Result Execution time Memory
649183 2022-10-09T14:43:58 Z gggkik Space Pirate (JOI14_space_pirate) C++14
47 / 100
 468 ms 820 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int M = 3010;
int E[M], n;
vector<int> R[M];
ll k;
ll ans[M];
int ck[M], in_cycle[M];
vector<vector<int>> cycle;
void find_cycle(int x){
	vector<int> V;
	while(!ck[x]) {
		ck[x] = 1;
		V.push_back(x);
		x = E[x];
	}
	int p = find(V.begin(),V.end(),x) - V.begin();
	if(p>=V.size()) return;
	cycle.push_back({});
	for(int i = p;i<V.size();i++) {
		in_cycle[V[i]]=1;
		cycle.back().push_back(V[i]);
	}
}
void dfs(int x,ll dist,int dep, vector<int> &L){ //
	ck[x] = 1;
	L.push_back(x); 
	//fi[v] 가 나에게 온다면?
	ans[L[(L.size() - (dist%L.size()))%L.size()]]++;
	for(auto i : R[x]) {
		dfs(i,dist,dep+1,L);
	}
	L.pop_back();
}
void dfs2(int x,int s,int dep,ll dist,int ver){
	ans[cycle[ver][(s-dep+dist)%cycle[ver].size()]]++;
	for(auto i : R[x]) if(!in_cycle[i]) {
		dfs2(i,s,dep+1,dist,ver);
	}
}
int main() {
	cin.tie(0)->sync_with_stdio(0);
	cin >> n >> k;
	for(int i = 1;i<=n;i++){
		cin >> E[i];
	}
	vector<int> first_cycle;
	int p = 1;
	while(!ck[p]){
		ck[p] = 1;
		first_cycle.push_back(p);
		p = E[p];
	}
	int p1 = find(first_cycle.begin(),first_cycle.end(),p) - first_cycle.begin();
	int w = first_cycle[(k-p1)%(first_cycle.size()-p1)+p1];
	ans[w] += ((ll)n-first_cycle.size())*n;
	
	for(int v = 0;v<first_cycle.size();v++)	{
		// first[v]에서 가는 간선은 이제 없다.
		for(int i = 1;i<=n;i++) ck[i] = 0;
		for(int i = 1;i<=n;i++) in_cycle[i] = 0;
		for(int i = 1;i<=n;i++) R[i].clear();
		cycle.clear();

		for(int i = 1;i<=n;i++) if(i^first_cycle[v]){
			R[E[i]].push_back(i);
		}
		vector<int> L;
		dfs(first_cycle[v],k-v,0,L);

		// 내 트리로 가는게 아닌 경우
		for(int i = 1;i<=n;i++) if(!ck[i])
			find_cycle(i);
		ll dist = k-v-1;
		for(int i = 0;i<cycle.size();i++)
			for(int j = 0;j<cycle[i].size();j++)
				dfs2(cycle[i][j],j,0,dist,i);
	}	
	for(int i = 1;i<=n;i++) cout << ans[i] << '\n';
}

Compilation message

space_pirate.cpp: In function 'void find_cycle(int)':
space_pirate.cpp:19:6: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  if(p>=V.size()) return;
      |     ~^~~~~~~~~~
space_pirate.cpp:21:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for(int i = p;i<V.size();i++) {
      |                ~^~~~~~~~~
space_pirate.cpp: In function 'int main()':
space_pirate.cpp:59:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |  for(int v = 0;v<first_cycle.size();v++) {
      |                ~^~~~~~~~~~~~~~~~~~~
space_pirate.cpp:76:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |   for(int i = 0;i<cycle.size();i++)
      |                 ~^~~~~~~~~~~~~
space_pirate.cpp:77:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |    for(int j = 0;j<cycle[i].size();j++)
      |                  ~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 15 ms 524 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 18 ms 516 KB Output is correct
18 Correct 468 ms 756 KB Output is correct
19 Correct 219 ms 716 KB Output is correct
20 Correct 238 ms 820 KB Output is correct
21 Correct 444 ms 728 KB Output is correct
22 Correct 204 ms 660 KB Output is correct
23 Correct 422 ms 748 KB Output is correct
24 Correct 185 ms 652 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 467 ms 756 KB Output is correct
27 Correct 222 ms 564 KB Output is correct
28 Correct 200 ms 692 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 596 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 15 ms 524 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 18 ms 516 KB Output is correct
18 Correct 468 ms 756 KB Output is correct
19 Correct 219 ms 716 KB Output is correct
20 Correct 238 ms 820 KB Output is correct
21 Correct 444 ms 728 KB Output is correct
22 Correct 204 ms 660 KB Output is correct
23 Correct 422 ms 748 KB Output is correct
24 Correct 185 ms 652 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 467 ms 756 KB Output is correct
27 Correct 222 ms 564 KB Output is correct
28 Correct 200 ms 692 KB Output is correct
29 Runtime error 1 ms 596 KB Execution killed with signal 11
30 Halted 0 ms 0 KB -