結果
| 問題 | No.3756 Udon Network |
| ユーザー |
👑 |
| 提出日時 | 2026-09-11 16:43:06 |
| 言語 | C++23 (gcc 15.3.0 + boost 1.92.0 + ACL) |
| 結果 |
AC
不安定
|
| 実行時間 | 467 ms / 2,000 ms |
| + 344µs | |
| コード長 | 4,845 bytes |
| 記録 | |
| コンパイル時間 | 4,205 ms |
| コンパイル使用メモリ | 398,192 KB |
| 実行使用メモリ | 92,652 KB |
| 最終ジャッジ日時 | 2026-10-09 17:37:13 |
| 合計ジャッジ時間 | 22,681 ms |
|
ジャッジサーバーID (参考情報) |
judge5_0 / judge4_1 |
| 純コード判定待ち |
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| サブタスク | 配点 | 結果 |
|---|---|---|
| Example | 0 % | AC * 8 |
| Subtask $1$ | 2 % | AC * 15 |
| Subtask $2$ | 4 % | AC * 22 |
| Subtask $3$ | 8 % | AC * 9 |
| Subtask $4$ | 16 % | AC * 10 |
| Subtask $5$ | 32 % | AC * 10 |
| Subtask $6$ | 38 % | AC * 53 |
| 合計 | 4 * 100% = 400 点 |
ソースコード
#include <bits/stdc++.h>
// #include <boost/multiprecision/cpp_int.hpp>
using namespace std;
using std::cerr, std::cin, std::cout;
#define vec vector
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using mint = atcoder::modint998244353;
std::istream &operator>>(std::istream &is, mint &a) {
long long t;
is >> t;
a = t;
return is;
}
std::ostream &operator<<(std::ostream &os, mint a) { return os << a.val(); }
// vec<mint> operator*(const vec<mint> &a, const vec<mint> &b) { return a.empty() || b.empty() ? vec<mint>() : atcoder::convolution(a, b); }
// vec<mint> &operator*=(vec<mint> &a, const vec<mint> &b) { return a = a * b; }
#endif
typedef long double ld;
#if LONG_MAX == 2147483647L
#undef long
#define long long long
#endif
#define uint unsigned int
#define ulong unsigned long
#define overload3(a, b, c, name, ...) name
#define rep3(i, a, b) for (int i = (a); i < (b); i++)
#define rep2(i, n) rep3(i, 0, n)
#define rep1(n) rep2(__i__, n)
#define rep(...) overload3(__VA_ARGS__, rep3, rep2, rep1)(__VA_ARGS__)
#define per3(i, a, b) for (int i = (b) - 1; i >= (a); i--)
#define per2(i, n) per3(i, 0, n)
#define per1(n) per2(__i__, n)
#define per(...) overload3(__VA_ARGS__, per3, per2, per1)(__VA_ARGS__)
#define all(a) a.begin(), a.end()
#define UNIQUE(a) sort(all(a)), a.erase(unique(all(a)), a.end()), a.shrink_to_fit()
#define sz(a) static_cast<int>(a.size())
#ifndef DEBUG
#define cerr \
if (false) cerr
// #undef assert
// #define assert(...) void(0)
#undef endl
#define endl '\n'
#endif
ostream &operator<<(ostream &os, __int128_t value) {
ostream::sentry s(os);
if (s) {
__uint128_t tmp = value < 0 ? -value : value;
char buffer[128];
char *d = std::end(buffer);
do {
--d;
*d = "0123456789"[tmp % 10];
tmp /= 10;
} while (tmp != 0);
if (value < 0) --d, *d = '-';
const int len = std::end(buffer) - d;
if (os.rdbuf()->sputn(d, len) != len) os.setstate(std::ios_base::badbit);
}
return os;
}
template <typename T, typename S>
ostream &operator<<(ostream &os, pair<T, S> a) {
return os << a.first << ' ' << a.second;
};
template <typename T>
ostream &operator<<(ostream &os, vector<T> a) {
const int n = a.size();
rep(i, n) {
os << a[i];
if (i + 1 != n) os << " ";
}
return os;
}
template <typename T, typename S>
istream &operator>>(istream &is, pair<T, S> &a) {
return is >> a.first >> a.second;
}
template <typename T, size_t n>
ostream &operator<<(ostream &os, array<T, n> a) {
rep(i, n) {
os << a[i];
if (i + 1 != n) os << " ";
}
return os;
}
template <typename T>
istream &operator>>(istream &is, vector<T> &a) {
for (T &i : a) is >> i;
return is;
}
template <typename T, typename S>
bool chmin(T &x, S y) {
if ((T)y < x) {
x = (T)y;
return true;
}
return false;
}
template <typename T, typename S>
bool chmax(T &x, S y) {
if (x < (T)y) {
x = (T)y;
return true;
}
return false;
}
template <typename T>
void operator++(vector<T> &a) {
for (T &i : a) ++i;
}
template <typename T>
void operator--(vector<T> &a) {
for (T &i : a) --i;
}
template <typename T>
void operator++(vector<T> &a, int) {
for (T &i : a) i++;
}
template <typename T>
void operator--(vector<T> &a, int) {
for (T &i : a) i--;
}
void init(), solve();
int main() {
// srand((unsigned)time(NULL));
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(20);
cerr << fixed << setprecision(20);
init();
int t = 1;
// cin >> t;
while (t--) solve();
}
void init() {}
void solve() {
int n, m, q;
cin >> n >> m >> q;
vec<int> a(n);
cin >> a;
vec<tuple<int, int, long>> g(m);
for (auto &[u, v, w] : g) {
cin >> u >> v >> w;
u--, v--;
}
sort(all(g), [](const tuple<int, int, long> &s1, const tuple<int, int, long> &s2) { return get<2>(s1) < get<2>(s2); });
vec<int> p(2 * n, -1), cnt(2 * n, 1), root(n);
vec<long> w(2 * n);
rep(i, n) root[i] = i;
vec<unordered_set<int>> d(n);
rep(i, n) d[i].insert(a[i]);
atcoder::dsu dsu(n);
int k = n;
for (auto [u, v, cost] : g) {
u = dsu.leader(u), v = dsu.leader(v);
if (u == v) continue;
const int x = root[u], y = root[v];
p[x] = p[y] = k;
w[k] = cost;
if (sz(d[u]) > sz(d[v])) swap(u, v);
d[v].merge(d[u]);
d[u].clear();
const int r = dsu.merge(u, v);
if (r == u) swap(d[u], d[v]);
root[r] = k;
cnt[k] = sz(d[r]);
k++;
}
vec<int> rt(n);
rep(i, n) rt[i] = root[dsu.leader(i)];
const int LOG = bit_width((unsigned)k);
vec<vec<int>> up(LOG, vec<int>(k, -1));
rep(i, k) up[0][i] = p[i];
rep(j, 1, LOG) rep(i, k) if (up[j - 1][i] != -1) up[j][i] = up[j - 1][up[j - 1][i]];
while (q--) {
int s, c;
cin >> s >> c;
s--;
if (cnt[rt[s]] < c) {
cout << -1 << endl;
continue;
}
if (c <= 1) {
cout << 0 << endl;
continue;
}
int x = s;
per(j, LOG) {
const int y = up[j][x];
if (y != -1 && cnt[y] < c) x = y;
}
cout << w[p[x]] << endl;
}
}