結果
問題 | No.2638 Initial fare |
ユーザー | miscalc |
提出日時 | 2024-02-19 21:23:53 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 2,968 bytes |
コンパイル時間 | 4,314 ms |
コンパイル使用メモリ | 273,788 KB |
実行使用メモリ | 30,040 KB |
最終ジャッジ日時 | 2024-09-29 01:19:53 |
合計ジャッジ時間 | 9,756 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
13,640 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 700 ms
14,808 KB |
testcase_05 | AC | 750 ms
15,548 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | TLE | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
testcase_17 | -- | - |
testcase_18 | -- | - |
testcase_19 | -- | - |
testcase_20 | -- | - |
testcase_21 | -- | - |
testcase_22 | -- | - |
testcase_23 | -- | - |
testcase_24 | -- | - |
testcase_25 | -- | - |
testcase_26 | -- | - |
testcase_27 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; using ull = unsigned long long; using pll = pair<ll, ll>; using tlll = tuple<ll, ll, ll>; constexpr ll INF = 1LL << 60; template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;} template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;} ll safemod(ll A, ll M) {ll res = A % M; if (res < 0) res += M; return res;} ll divfloor(ll A, ll B) {if (B < 0) A = -A, B = -B; return (A - safemod(A, B)) / B;} ll divceil(ll A, ll B) {if (B < 0) A = -A, B = -B; return divfloor(A + B - 1, B);} ll pow_ll(ll A, ll B) {if (A == 0 || A == 1) {return A;} if (A == -1) {return B & 1 ? -1 : 1;} ll res = 1; for (int i = 0; i < B; i++) {res *= A;} return res;} ll mul_limited(ll A, ll B, ll M = INF) { return B == 0 ? 0 : A > M / B ? M : A * B; } ll pow_limited(ll A, ll B, ll M = INF) { if (A == 0 || A == 1) {return A;} ll res = 1; for (int i = 0; i < B; i++) {if (res > M / A) return M; res *= A;} return res;} template<class T> void unique(vector<T> &V) {V.erase(unique(V.begin(), V.end()), V.end());} template<class T> void sortunique(vector<T> &V) {sort(V.begin(), V.end()); V.erase(unique(V.begin(), V.end()), V.end());} #define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false) //* #include <atcoder/all> using namespace atcoder; template <class T, internal::is_static_modint_t<T> * = nullptr> istream &operator>>(istream &is, T &a) { ll v; is >> v; a = v; return is; } template <class T, internal::is_dynamic_modint_t<T> * = nullptr> istream &operator>>(istream &is, T &a) { ll v; is >> v; a = v; return is; } template <class T, internal::is_static_modint_t<T> * = nullptr> ostream &operator<<(ostream &os, const T &a) { os << a.val(); return os; } template <class T, internal::is_dynamic_modint_t<T> * = nullptr> ostream &operator<<(ostream &os, const T &a) { os << a.val(); return os; } using mint = modint998244353; //using mint = modint1000000007; //using mint = modint; //*/ template<class T> void printvec(const vector<T> &V) {int _n = V.size(); for (int i = 0; i < _n; i++) cout << V[i] << (i == _n - 1 ? "" : " "); cout << '\n';} template<class T> void printvect(const vector<T> &V) {for (auto v : V) cout << v << '\n';} template<class T> void printvec2(const vector<vector<T>> &V) {for (auto &v : V) printvec(v);} int main() { ll N; cin >> N; vector<vector<ll>> G(N); for (ll i = 0; i < N - 1; i++) { ll u, v; cin >> u >> v; u--, v--; G.at(u).push_back(v); G.at(v).push_back(u); } ll ans = 0; for (ll s = 0; s < N; s++) { queue<pll> que; que.push({s, 0}); set<ll> st; while (!que.empty()) { auto [v, d] = que.front(); que.pop(); st.insert(v); if (d == 3) continue; for (auto nv : G.at(v)) { que.push({nv, d + 1}); } } ans += st.size() - 1; } ans /= 2; cout << ans << endl; }