| Task: | Distances |
| Sender: | kostia244 |
| Submission time: | 2021-01-30 20:01:07 +0200 |
| Language: | C++ (C++17) |
| Status: | READY |
| Result: | 0 |
| group | verdict | score |
|---|---|---|
| #1 | WRONG ANSWER | 0 |
| #2 | WRONG ANSWER | 0 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | WRONG ANSWER | 0.01 s | 1, 2 | details |
| #2 | WRONG ANSWER | 0.01 s | 2 | details |
Compiler report
input/code.cpp: In function 'std::array<int, 2> dfs(int, int)':
input/code.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 1; i < chi.size(); i++) {
~~^~~~~~~~~~~~Code
#include<bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
using ll = long long;
const int maxn = 1<<18;
int n;
vector<vector<int>> g;
vector<int> nxt, dep;
array<int, 2> dfs(int v, int p = -1) {
if(g[v].size() == 1 && p != -1) return {v, v};
vector<array<int, 2>> chi;
for(auto &i : g[v]) if(i != p) {
dep[i] = dep[v]+1;
chi.push_back(dfs(i, v));
}
for(int i = 1; i < chi.size(); i++) {
nxt[chi[i-1][1]] = chi[i][0];
}
nxt[chi.back()[1]] = v;
return {chi[0][0], v};
}
int main() {
cin.tie(0)->sync_with_stdio(0);
int t;cin >> t;
while(t--) {
cin >> n;
g = vector<vector<int>>(n+1);
nxt = vector<int>(n+1, -1);
dep = vector<int>(n+1, 0);
for(int f, t, i = 1; i < n; i++) {
cin >> f >> t;
g[f].push_back(t);
g[t].push_back(f);
}
n = dfs(1)[0];
do {
cout << n << " ";
} while((n=nxt[n])!=-1);
cout << '\n';
}
}
Test details
Test 1
Group: 1, 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 8 5 2 2 3 3 7 ... |
| correct output |
|---|
| 1 8 2 5 6 7 3 4 1 7 2 8 3 6 4 5 1 4 6 2 7 5 8 3 1 8 3 2 4 7 6 5 1 6 4 7 5 2 3 8 ... |
| user output |
|---|
| 5 6 2 7 3 8 4 1 2 8 7 3 6 4 5 1 4 7 2 5 8 6 3 1 3 8 2 4 7 6 5 1 6 5 2 7 3 4 8 1 ... Truncated |
Test 2
Group: 2
Verdict: WRONG ANSWER
| input |
|---|
| 100 100 37 59 81 37 44 81 ... |
| correct output |
|---|
| 1 99 82 81 59 5 71 55 17 24 13... |
| user output |
|---|
| 5 55 71 17 59 24 52 32 100 39 ... Truncated |