結果
| 問題 |
No.2532 Want Play More
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2023-11-18 04:57:23 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 199 ms / 2,000 ms |
| コード長 | 4,250 bytes |
| コンパイル時間 | 1,242 ms |
| コンパイル使用メモリ | 135,252 KB |
| 最終ジャッジ日時 | 2025-02-17 22:27:15 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cmath>
#include <complex>
#include <cstdint>
#include <cstring>
#include <ctime>
#include <deque>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <unordered_map>
#include <unordered_set>
template <int mod>
struct ModInt {
int x;
ModInt() : x(0) {}
ModInt(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
ModInt& operator+=(const ModInt& p) {
if ((x += p.x) >= mod) x -= mod;
return *this;
}
ModInt& operator-=(const ModInt& p) {
if ((x += mod - p.x) >= mod) x -= mod;
return *this;
}
ModInt& operator*=(const ModInt& p) {
x = (int)(1LL * x * p.x % mod);
return *this;
}
ModInt& operator/=(const ModInt& p) {
*this *= p.inverse();
return *this;
}
ModInt& operator^=(long long p) { // quick_pow here:3
ModInt res = 1;
for (; p; p >>= 1) {
if (p & 1) res *= *this;
*this *= *this;
}
return *this = res;
}
ModInt operator-() const { return ModInt(-x); }
ModInt operator+(const ModInt& p) const { return ModInt(*this) += p; }
ModInt operator-(const ModInt& p) const { return ModInt(*this) -= p; }
ModInt operator*(const ModInt& p) const { return ModInt(*this) *= p; }
ModInt operator/(const ModInt& p) const { return ModInt(*this) /= p; }
ModInt operator^(long long p) const { return ModInt(*this) ^= p; }
bool operator==(const ModInt& p) const { return x == p.x; }
bool operator!=(const ModInt& p) const { return x != p.x; }
explicit operator int() const { return x; } // added by QCFium
ModInt operator=(const int p) {
x = p;
return ModInt(*this);
} // added by QCFium
ModInt inverse() const {
int a = x, b = mod, u = 1, v = 0, t;
while (b > 0) {
t = a / b;
a -= t * b;
std::swap(a, b);
u -= t * v;
std::swap(u, v);
}
return ModInt(u);
}
friend std::ostream& operator<<(std::ostream& os, const ModInt<mod>& p) {
return os << p.x;
}
friend std::istream& operator>>(std::istream& is, ModInt<mod>& a) {
long long x;
is >> x;
a = ModInt<mod>(x);
return (is);
}
};
using mint = ModInt<1000000007>;
const int MOD = 1000000007;
struct MComb {
std::vector<mint> fact;
std::vector<mint> inversed;
MComb(int n) { // O(n+log(mod))
fact = std::vector<mint>(n + 1, 1);
for (int i = 1; i <= n; i++) fact[i] = fact[i - 1] * mint(i);
inversed = std::vector<mint>(n + 1);
inversed[n] = fact[n] ^ (MOD - 2);
for (int i = n - 1; i >= 0; i--)
inversed[i] = inversed[i + 1] * mint(i + 1);
}
mint ncr(int n, int r) {
if (n < r) return 0;
return (fact[n] * inversed[r] * inversed[n - r]);
}
mint npr(int n, int r) { return (fact[n] * inversed[n - r]); }
mint nhr(int n, int r) {
assert(n + r - 1 < (int)fact.size());
return ncr(n + r - 1, r);
}
};
mint ncr(int n, int r) {
mint res = 1;
for (int i = n - r + 1; i <= n; i++) res *= i;
for (int i = 1; i <= r; i++) res /= i;
return res;
}
template <typename T>
std::vector<T> get_divisors(T x, bool sorted = true) {
std::vector<T> res;
for (T i = 1; i <= x / i; i++)
if (x % i == 0) {
res.push_back(i);
if (i != x / i) res.push_back(x / i);
}
if (sorted) std::sort(res.begin(), res.end());
return res;
}
void solve() {
int n;
std::cin >> n;
std::vector dp(n, std::vector(2, 0));
std::vector g(n, std::vector<int>());
if (n == 1) {
std::cout << 0 << '\n' << 0 << '\n';
return;
}
for (int i = 0; i < n - 1; i++) {
int u, v;
std::cin >> u >> v;
u--, v--;
g[u].push_back(v);
g[v].push_back(u);
}
auto dfs = [&](auto&& dfs, int u, int p) -> void {
dp[u][1] = 1e9;
if (g[u].size() == 1 and u != 0) {
dp[u][1] = 0;
}
for (int v : g[u]) {
if (v == p) continue;
dfs(dfs, v, u);
dp[u][0] = std::max(dp[v][1] + 1, dp[u][0]);
dp[u][1] = std::min(dp[v][0] + 1, dp[u][1]);
}
};
dfs(dfs, 0, -1);
std::cout << dp[0][0] << '\n' << dp[0][1] << '\n';
}
int main() {
int t = 1;
// std::cin >> t;
while (t--) solve();
}