| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1159625 | Wendidiask | Island Hopping (JOI24_island) | C++20 | 0 ms | 0 KiB |
/*
:---:--:--::::::--:-:----:
::-:::. ::-:::
.* -===.. :---
.-+*##=-------====-: :--:
:+##=.* -= :=+- .-=:
.+++-. :- -=. .=+- .--.
.++=- + -= :*- :-.
+*+- :- -=. -*: :=:
#*: * -=. +- .=
=:%+ -: -=. +- --
-%: * -=. *: +.
:%-.. =. -=. # -:
:=# .. + -=. == -=
---+ . = -=. .# .+
-: == . = :------::------:.-=. % .=
:- == .=. ---:. :--#+. .% :-
= .* .+.. :=- :++ -+ =:
+ #. + -=: :*%-*: *
:= :# :=:= . :-----: =+-+ .+
* -* *=- . .- :::::::. :* .#+. +
:- -+ :#. --::-----: :* ++= .-
+ :*. *. .:::::*%: ++ +.-=. +
+ -#**----: .= -*. + -= =
* +.#=+: + . .=+: =. -=. =
= -+ :++: + .. .=+= .= -=. -
= %- :====-:. =. .:--===- * -=. -
+ +-- .:--==#==-:.= + -=. =
* + * =. : .= -=. =
+ = * + = -=. +
:- = .= =: = -=. .-
* + =: * * -=. +
:- .+ =- :- .+ -=. .+
* * := * := -= *
= :- =: .- .=: -=. =:
-: * .=- + .=- -= :-
=: -: --: :- :--: -=. .=
=:+ ----. * :---. -= .+
--=*----------------------=*+=--=+--=+*+------------------------------------------------%+:.
:: := +:- -- :.
.=. =.
-= -=
.=: .=.
.=: .+:
:-- :-:
-- -=.
:--. --:
:--: .--:
.-:-: ::--.
:----. .:----
.:::::::::-::::::--::::::::.
*/
// Hello this is Tyx2019's clone
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define debug(x) cerr << #x << " is " << x << "\n"
#define hehe ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define repb(i, a, b) for (int i = b; i >= a; i--)
#define pii pair<int, int>
#define linebreak cout << "---------------------------------------------------------\n"
#define f first
#define s second
#define pb push_back
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// good luck
const ll MS = 305, mod = 1e9+9, INF = 3e18, blk = 400;
namespace {
const int invalid_v_range = 1;
const int invalid_k_range = 2;
const int query_limit_exceeded = 3;
const int invalid_xy_range = 4;
const int no_edge = 5;
const int answer_twice = 6;
const int invalid_answer_times = 7;
int N, L, ok;
std::vector<int> A, B, answered;
std::vector<std::vector<int>> g, dist, que;
std::vector<std::pair<int, int>> p;
int query_count = 0;
int answer_count = 0;
void wronganswer(int code) {
printf("Wrong Answer [%d]\n", code);
exit(0);
}
void dfs(int now, int pre, std::vector<std::vector<int>> &g,
std::vector<int> &dist) {
for (int nxt : g[now]) {
if (nxt == pre) {
continue;
}
dist[nxt] = dist[now] + 1;
dfs(nxt, now, g, dist);
}
}
} // namespace
int query(int v, int k) {
if (v < 1 || N < v) {
wronganswer(invalid_v_range);
}
if (k < 1 || N - 1 < k) {
wronganswer(invalid_k_range);
}
query_count++;
if (query_count > L) {
wronganswer(query_limit_exceeded);
}
return que[v - 1][k] + 1;
}
void answer(int x, int y) {
if (x < 1 || N < x || y < 1 || N < y) {
wronganswer(invalid_xy_range);
}
if (x > y) {
std::swap(x, y);
}
answer_count++;
if (answer_count > N - 1) {
wronganswer(invalid_answer_times);
}
ok = -1;
for (int i = 0; i < N - 1; i++) {
if (A[i] == x && B[i] == y) {
if (answered[i] != 0) {
wronganswer(answer_twice);
}
ok = i;
}
}
if (ok == -1) {
wronganswer(no_edge);
}
answered[ok] = 1;
}
int parent[MS];
int find(int x) {
if (parent[x] == x) return x;
else {
return parent[x] = find(parent[x]);
}
}
bool same(int x, int y) {
return find(x) == find(y);
}
void merge(int x, int y) {
int rootx = find(x), rooty = find(y);
parent[rootx] = rooty;
}
void solve(int n, int l) {
for (int i = 1; i <= n; i++) parent[i] = i;
for (int i = 1; i < n; i++) {
int u = query(1, i), k = 1;
while (!same(1, u)) {
int v = query(u, k);
answer(u, v);
merge(u, v);
k++;
}
}
}
int main(int argc, char **argv) {
if (scanf("%d", &N) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
if (scanf("%d", &L) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
A.resize(N - 1);
B.resize(N - 1);
answered.resize(N - 1, 0);
g.resize(N);
dist.resize(N, std::vector<int>(N));
que.resize(N);
for (int i = 0; i < N - 1; i++) {
if (scanf("%d", &A[i]) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
if (scanf("%d", &B[i]) != 1) {
fprintf(stderr, "Error while reading input.\n");
exit(1);
}
}
for (int i = 0; i < N - 1; i++) {
if (A[i] >= B[i]) {
std::swap(A[i], B[i]);
}
g[A[i] - 1].emplace_back(B[i] - 1);
g[B[i] - 1].emplace_back(A[i] - 1);
}
for (int i = 0; i < N; i++) {
dist[i][i] = 0;
dfs(i, -1, g, dist[i]);
p.clear();
for (int j = 0; j < N; j++) {
p.emplace_back(dist[i][j], j);
}
std::sort(p.begin(), p.end());
for (int j = 0; j < N; j++) {
que[i].emplace_back(p[j].second);
}
}
solve(N, L);
if (answer_count != N - 1) {
wronganswer(invalid_answer_times);
}
printf("Accepted: %d\n", query_count);
return 0;
}