| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 680442 | 2023-01-10T21:04:44 Z | qwerasdfzxcl | Wells (CEOI21_wells) | C++17 | 92 ms | 72444 KB |
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
int dist[10010][10010], vcnt, n, k;
vector<int> adj[1501500], G[1501500], st;
vector<vector<int>> path;
void dfs(int s, int pa = -1){
st.push_back(s);
if ((int)st.size()==k) path.push_back(st);
dist[st[0]][s] = (int)st.size() - 1;
for (auto &v:adj[s]) if (v!=pa){
dfs(v, s);
}
st.pop_back();
}
int col[1501500];
int simulate(int s, bool flag = 0){
vector<int> q = {s}, ch = {s};
col[s] = 1;
while(!q.empty()){
int v = q.back(); q.pop_back();
for (int i=1;i<=n;i++) if (dist[v][i]==k && !col[i]){
col[i] = 1;
q.push_back(i);
ch.push_back(i);
}
}
int ret = 1;
for (auto &p:path){
int cnt = 0;
for (auto &x:p) if (col[x]) cnt++;
if (cnt>1){
for (auto &x:ch) col[x] = 0;
return 0;
}
if (cnt==0) ret = -1;
}
if (!flag) for (auto &x:ch) col[x] = 0;
return ret;
}
int main(){
scanf("%d %d", &n, &k);
for (int i=1;i<=n-1;i++){
int x, y;
scanf("%d %d", &x, &y);
adj[x].push_back(y);
adj[y].push_back(x);
}
for (int i=1;i<=n;i++){
dfs(i);
}
for (int i=1;i<=n;i++) if (simulate(i)==1){
printf("YES\n0\n");
return 0;
}
for (int i=1;i<=n;i++) if (simulate(i, 1)==1){
printf("YES\n0\n");
return 0;
}
printf("NO\n0\n");
return 0;
}
Compilation message
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Partially correct | 32 ms | 70764 KB | Output is partially correct |
| 2 | Partially correct | 39 ms | 71884 KB | Output is partially correct |
| 3 | Partially correct | 34 ms | 71892 KB | Output is partially correct |
| 4 | Partially correct | 42 ms | 71900 KB | Output is partially correct |
| 5 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 6 | Partially correct | 35 ms | 71900 KB | Output is partially correct |
| 7 | Correct | 60 ms | 71836 KB | Output is correct |
| 8 | Partially correct | 38 ms | 71780 KB | Output is partially correct |
| 9 | Partially correct | 37 ms | 71784 KB | Output is partially correct |
| 10 | Correct | 88 ms | 71940 KB | Output is correct |
| 11 | Partially correct | 40 ms | 72012 KB | Output is partially correct |
| 12 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 13 | Partially correct | 34 ms | 71764 KB | Output is partially correct |
| 14 | Partially correct | 40 ms | 71840 KB | Output is partially correct |
| 15 | Partially correct | 42 ms | 71812 KB | Output is partially correct |
| 16 | Partially correct | 43 ms | 71756 KB | Output is partially correct |
| 17 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 18 | Partially correct | 35 ms | 71856 KB | Output is partially correct |
| 19 | Partially correct | 36 ms | 71816 KB | Output is partially correct |
| 20 | Correct | 50 ms | 72020 KB | Output is correct |
| 21 | Partially correct | 34 ms | 71804 KB | Output is partially correct |
| 22 | Partially correct | 35 ms | 71768 KB | Output is partially correct |
| 23 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 24 | Partially correct | 38 ms | 71936 KB | Output is partially correct |
| 25 | Partially correct | 38 ms | 71892 KB | Output is partially correct |
| 26 | Partially correct | 35 ms | 71884 KB | Output is partially correct |
| 27 | Partially correct | 39 ms | 71908 KB | Output is partially correct |
| 28 | Correct | 57 ms | 71928 KB | Output is correct |
| 29 | Partially correct | 37 ms | 71992 KB | Output is partially correct |
| 30 | Partially correct | 34 ms | 71816 KB | Output is partially correct |
| 31 | Partially correct | 45 ms | 71780 KB | Output is partially correct |
| 32 | Correct | 92 ms | 71960 KB | Output is correct |
| 33 | Partially correct | 34 ms | 71940 KB | Output is partially correct |
| 34 | Correct | 64 ms | 72020 KB | Output is correct |
| 35 | Partially correct | 43 ms | 72040 KB | Output is partially correct |
| 36 | Partially correct | 35 ms | 71760 KB | Output is partially correct |
| 37 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 38 | Partially correct | 35 ms | 71780 KB | Output is partially correct |
| 39 | Partially correct | 38 ms | 72404 KB | Output is partially correct |
| 40 | Partially correct | 37 ms | 71980 KB | Output is partially correct |
| 41 | Partially correct | 37 ms | 71812 KB | Output is partially correct |
| 42 | Partially correct | 39 ms | 71892 KB | Output is partially correct |
| 43 | Partially correct | 39 ms | 71900 KB | Output is partially correct |
| 44 | Correct | 64 ms | 71932 KB | Output is correct |
| 45 | Partially correct | 45 ms | 71828 KB | Output is partially correct |
| 46 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 47 | Partially correct | 40 ms | 72444 KB | Output is partially correct |
| 48 | Partially correct | 35 ms | 71948 KB | Output is partially correct |
| 49 | Incorrect | 49 ms | 71816 KB | Output isn't correct |
| 50 | Halted | 0 ms | 0 KB | - |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Partially correct | 32 ms | 70764 KB | Output is partially correct |
| 2 | Partially correct | 39 ms | 71884 KB | Output is partially correct |
| 3 | Partially correct | 34 ms | 71892 KB | Output is partially correct |
| 4 | Partially correct | 42 ms | 71900 KB | Output is partially correct |
| 5 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 6 | Partially correct | 35 ms | 71900 KB | Output is partially correct |
| 7 | Correct | 60 ms | 71836 KB | Output is correct |
| 8 | Partially correct | 38 ms | 71780 KB | Output is partially correct |
| 9 | Partially correct | 37 ms | 71784 KB | Output is partially correct |
| 10 | Correct | 88 ms | 71940 KB | Output is correct |
| 11 | Partially correct | 40 ms | 72012 KB | Output is partially correct |
| 12 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 13 | Partially correct | 34 ms | 71764 KB | Output is partially correct |
| 14 | Partially correct | 40 ms | 71840 KB | Output is partially correct |
| 15 | Partially correct | 42 ms | 71812 KB | Output is partially correct |
| 16 | Partially correct | 43 ms | 71756 KB | Output is partially correct |
| 17 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 18 | Partially correct | 35 ms | 71856 KB | Output is partially correct |
| 19 | Partially correct | 36 ms | 71816 KB | Output is partially correct |
| 20 | Correct | 50 ms | 72020 KB | Output is correct |
| 21 | Partially correct | 34 ms | 71804 KB | Output is partially correct |
| 22 | Partially correct | 35 ms | 71768 KB | Output is partially correct |
| 23 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 24 | Partially correct | 38 ms | 71936 KB | Output is partially correct |
| 25 | Partially correct | 38 ms | 71892 KB | Output is partially correct |
| 26 | Partially correct | 35 ms | 71884 KB | Output is partially correct |
| 27 | Partially correct | 39 ms | 71908 KB | Output is partially correct |
| 28 | Correct | 57 ms | 71928 KB | Output is correct |
| 29 | Partially correct | 37 ms | 71992 KB | Output is partially correct |
| 30 | Partially correct | 34 ms | 71816 KB | Output is partially correct |
| 31 | Partially correct | 45 ms | 71780 KB | Output is partially correct |
| 32 | Correct | 92 ms | 71960 KB | Output is correct |
| 33 | Partially correct | 34 ms | 71940 KB | Output is partially correct |
| 34 | Correct | 64 ms | 72020 KB | Output is correct |
| 35 | Partially correct | 43 ms | 72040 KB | Output is partially correct |
| 36 | Partially correct | 35 ms | 71760 KB | Output is partially correct |
| 37 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 38 | Partially correct | 35 ms | 71780 KB | Output is partially correct |
| 39 | Partially correct | 38 ms | 72404 KB | Output is partially correct |
| 40 | Partially correct | 37 ms | 71980 KB | Output is partially correct |
| 41 | Partially correct | 37 ms | 71812 KB | Output is partially correct |
| 42 | Partially correct | 39 ms | 71892 KB | Output is partially correct |
| 43 | Partially correct | 39 ms | 71900 KB | Output is partially correct |
| 44 | Correct | 64 ms | 71932 KB | Output is correct |
| 45 | Partially correct | 45 ms | 71828 KB | Output is partially correct |
| 46 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 47 | Partially correct | 40 ms | 72444 KB | Output is partially correct |
| 48 | Partially correct | 35 ms | 71948 KB | Output is partially correct |
| 49 | Incorrect | 49 ms | 71816 KB | Output isn't correct |
| 50 | Halted | 0 ms | 0 KB | - |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Partially correct | 32 ms | 70764 KB | Output is partially correct |
| 2 | Partially correct | 39 ms | 71884 KB | Output is partially correct |
| 3 | Partially correct | 34 ms | 71892 KB | Output is partially correct |
| 4 | Partially correct | 42 ms | 71900 KB | Output is partially correct |
| 5 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 6 | Partially correct | 35 ms | 71900 KB | Output is partially correct |
| 7 | Correct | 60 ms | 71836 KB | Output is correct |
| 8 | Partially correct | 38 ms | 71780 KB | Output is partially correct |
| 9 | Partially correct | 37 ms | 71784 KB | Output is partially correct |
| 10 | Correct | 88 ms | 71940 KB | Output is correct |
| 11 | Partially correct | 40 ms | 72012 KB | Output is partially correct |
| 12 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 13 | Partially correct | 34 ms | 71764 KB | Output is partially correct |
| 14 | Partially correct | 40 ms | 71840 KB | Output is partially correct |
| 15 | Partially correct | 42 ms | 71812 KB | Output is partially correct |
| 16 | Partially correct | 43 ms | 71756 KB | Output is partially correct |
| 17 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 18 | Partially correct | 35 ms | 71856 KB | Output is partially correct |
| 19 | Partially correct | 36 ms | 71816 KB | Output is partially correct |
| 20 | Correct | 50 ms | 72020 KB | Output is correct |
| 21 | Partially correct | 34 ms | 71804 KB | Output is partially correct |
| 22 | Partially correct | 35 ms | 71768 KB | Output is partially correct |
| 23 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 24 | Partially correct | 38 ms | 71936 KB | Output is partially correct |
| 25 | Partially correct | 38 ms | 71892 KB | Output is partially correct |
| 26 | Partially correct | 35 ms | 71884 KB | Output is partially correct |
| 27 | Partially correct | 39 ms | 71908 KB | Output is partially correct |
| 28 | Correct | 57 ms | 71928 KB | Output is correct |
| 29 | Partially correct | 37 ms | 71992 KB | Output is partially correct |
| 30 | Partially correct | 34 ms | 71816 KB | Output is partially correct |
| 31 | Partially correct | 45 ms | 71780 KB | Output is partially correct |
| 32 | Correct | 92 ms | 71960 KB | Output is correct |
| 33 | Partially correct | 34 ms | 71940 KB | Output is partially correct |
| 34 | Correct | 64 ms | 72020 KB | Output is correct |
| 35 | Partially correct | 43 ms | 72040 KB | Output is partially correct |
| 36 | Partially correct | 35 ms | 71760 KB | Output is partially correct |
| 37 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 38 | Partially correct | 35 ms | 71780 KB | Output is partially correct |
| 39 | Partially correct | 38 ms | 72404 KB | Output is partially correct |
| 40 | Partially correct | 37 ms | 71980 KB | Output is partially correct |
| 41 | Partially correct | 37 ms | 71812 KB | Output is partially correct |
| 42 | Partially correct | 39 ms | 71892 KB | Output is partially correct |
| 43 | Partially correct | 39 ms | 71900 KB | Output is partially correct |
| 44 | Correct | 64 ms | 71932 KB | Output is correct |
| 45 | Partially correct | 45 ms | 71828 KB | Output is partially correct |
| 46 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 47 | Partially correct | 40 ms | 72444 KB | Output is partially correct |
| 48 | Partially correct | 35 ms | 71948 KB | Output is partially correct |
| 49 | Incorrect | 49 ms | 71816 KB | Output isn't correct |
| 50 | Halted | 0 ms | 0 KB | - |
| # | Verdict | Execution time | Memory | Grader output |
|---|---|---|---|---|
| 1 | Partially correct | 32 ms | 70764 KB | Output is partially correct |
| 2 | Partially correct | 39 ms | 71884 KB | Output is partially correct |
| 3 | Partially correct | 34 ms | 71892 KB | Output is partially correct |
| 4 | Partially correct | 42 ms | 71900 KB | Output is partially correct |
| 5 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 6 | Partially correct | 35 ms | 71900 KB | Output is partially correct |
| 7 | Correct | 60 ms | 71836 KB | Output is correct |
| 8 | Partially correct | 38 ms | 71780 KB | Output is partially correct |
| 9 | Partially correct | 37 ms | 71784 KB | Output is partially correct |
| 10 | Correct | 88 ms | 71940 KB | Output is correct |
| 11 | Partially correct | 40 ms | 72012 KB | Output is partially correct |
| 12 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 13 | Partially correct | 34 ms | 71764 KB | Output is partially correct |
| 14 | Partially correct | 40 ms | 71840 KB | Output is partially correct |
| 15 | Partially correct | 42 ms | 71812 KB | Output is partially correct |
| 16 | Partially correct | 43 ms | 71756 KB | Output is partially correct |
| 17 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 18 | Partially correct | 35 ms | 71856 KB | Output is partially correct |
| 19 | Partially correct | 36 ms | 71816 KB | Output is partially correct |
| 20 | Correct | 50 ms | 72020 KB | Output is correct |
| 21 | Partially correct | 34 ms | 71804 KB | Output is partially correct |
| 22 | Partially correct | 35 ms | 71768 KB | Output is partially correct |
| 23 | Partially correct | 36 ms | 71756 KB | Output is partially correct |
| 24 | Partially correct | 38 ms | 71936 KB | Output is partially correct |
| 25 | Partially correct | 38 ms | 71892 KB | Output is partially correct |
| 26 | Partially correct | 35 ms | 71884 KB | Output is partially correct |
| 27 | Partially correct | 39 ms | 71908 KB | Output is partially correct |
| 28 | Correct | 57 ms | 71928 KB | Output is correct |
| 29 | Partially correct | 37 ms | 71992 KB | Output is partially correct |
| 30 | Partially correct | 34 ms | 71816 KB | Output is partially correct |
| 31 | Partially correct | 45 ms | 71780 KB | Output is partially correct |
| 32 | Correct | 92 ms | 71960 KB | Output is correct |
| 33 | Partially correct | 34 ms | 71940 KB | Output is partially correct |
| 34 | Correct | 64 ms | 72020 KB | Output is correct |
| 35 | Partially correct | 43 ms | 72040 KB | Output is partially correct |
| 36 | Partially correct | 35 ms | 71760 KB | Output is partially correct |
| 37 | Partially correct | 35 ms | 71852 KB | Output is partially correct |
| 38 | Partially correct | 35 ms | 71780 KB | Output is partially correct |
| 39 | Partially correct | 38 ms | 72404 KB | Output is partially correct |
| 40 | Partially correct | 37 ms | 71980 KB | Output is partially correct |
| 41 | Partially correct | 37 ms | 71812 KB | Output is partially correct |
| 42 | Partially correct | 39 ms | 71892 KB | Output is partially correct |
| 43 | Partially correct | 39 ms | 71900 KB | Output is partially correct |
| 44 | Correct | 64 ms | 71932 KB | Output is correct |
| 45 | Partially correct | 45 ms | 71828 KB | Output is partially correct |
| 46 | Partially correct | 34 ms | 71884 KB | Output is partially correct |
| 47 | Partially correct | 40 ms | 72444 KB | Output is partially correct |
| 48 | Partially correct | 35 ms | 71948 KB | Output is partially correct |
| 49 | Incorrect | 49 ms | 71816 KB | Output isn't correct |
| 50 | Halted | 0 ms | 0 KB | - |