結果
| 問題 | No.1215 都市消滅ビーム |
| ユーザー |
 Thistle
|
| 提出日時 | 2020-08-24 15:40:42 |
| 言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 13,776 bytes |
| コンパイル時間 | 2,923 ms |
| コンパイル使用メモリ | 160,796 KB |
| 実行使用メモリ | 218,600 KB |
| 最終ジャッジ日時 | 2024-11-14 18:28:23 |
| 合計ジャッジ時間 | 43,445 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge4 |
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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 | WA | - |
| testcase_01 | WA | - |
| testcase_02 | WA | - |
| testcase_03 | RE | - |
| testcase_04 | WA | - |
| testcase_05 | WA | - |
| testcase_06 | RE | - |
| testcase_07 | RE | - |
| testcase_08 | RE | - |
| testcase_09 | RE | - |
| testcase_10 | WA | - |
| testcase_11 | RE | - |
| testcase_12 | WA | - |
| testcase_13 | RE | - |
| testcase_14 | RE | - |
| testcase_15 | RE | - |
| testcase_16 | RE | - |
| testcase_17 | RE | - |
| testcase_18 | RE | - |
| testcase_19 | RE | - |
| testcase_20 | RE | - |
| testcase_21 | RE | - |
| testcase_22 | RE | - |
| testcase_23 | RE | - |
| testcase_24 | RE | - |
| testcase_25 | RE | - |
| testcase_26 | RE | - |
| testcase_27 | RE | - |
| testcase_28 | RE | - |
| testcase_29 | RE | - |
| testcase_30 | RE | - |
| testcase_31 | RE | - |
| testcase_32 | RE | - |
| testcase_33 | RE | - |
| testcase_34 | RE | - |
| testcase_35 | RE | - |
| testcase_36 | RE | - |
| testcase_37 | RE | - |
| testcase_38 | RE | - |
| testcase_39 | RE | - |
| testcase_40 | RE | - |
| testcase_41 | RE | - |
ソースコード
#pragma GCC target ("avx")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define _USE_MATH_DEFINES
#include<iostream>
#include<string>
#include<queue>
#include<cmath>
#include<map>
#include<set>
#include<list>
#include<iomanip>
#include<vector>
#include<random>
#include<functional>
#include<algorithm>
#include<stack>
#include<cstdio>
#include<cstring>
#include<bitset>
#include<unordered_map>
#include<climits>
#include<fstream>
#include<complex>
#include<time.h>
#include<cassert>
#include<functional>
#include<numeric>
#include<tuple>
using namespace std;
using ll = long long;
using ld = long double;
#define int long long
#define all(a) (a).begin(),(a).end()
#define fs first
#define sc second
#define xx first
#define yy second.first
#define zz second.second
#define H pair<int, int>
#define P pair<int, pair<int, int>>
#define Q(i,j,k) mkp(i,mkp(j,k))
#define rng(i,s,n) for(int i = (s) ; i < (n) ; i++)
#define rep(i,n) rng(i, 0, (n))
#define mkp make_pair
#define vec vector
#define vi vec<int>
#define pb emplace_back
#define siz(a) (int)(a).size()
#define crdcomp(b) sort(all((b)));(b).erase(unique(all((b))),(b).end())
#define getidx(b,i) (lower_bound(all(b),(i))-(b).begin())
#define ssp(i,n) (i==(int)(n)-1?"\n":" ")
#define ctoi(c) (int)(c-'0')
#define itoc(c) (char)(c+'0')
#define cyes printf("Yes\n")
#define cno printf("No\n")
#define cdf(n) int quetimes_=(n);rep(qq123_,quetimes_)
#define gcj printf("Case #%lld: ",qq123_+1)
#define readv(a,n) a.resize(n,0);rep(i,(n)) a[i]=read()
#define found(a,x) (a.find(x)!=a.end())
//#define endl "\n"
constexpr int mod = (ll)1e9 + 7;
constexpr int Mod = 998244353;
constexpr ld EPS = 1e-10;
constexpr ll inf = (ll)3 * 1e18;
constexpr int Inf = (ll)15 * 1e8;
constexpr int dx[] = { -1,1,0,0 }, dy[] = { 0,0,-1,1 };
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
ll read() { ll u, k = scanf("%lld", &u); return u; }
string reads() { string s; cin >> s; return s; }
H readh(short g = 0) { H u; int k = scanf("%lld %lld", &u.fs, &u.sc); if (g == 1) u.fs--, u.sc--; if (g == 2) u.fs--; return u; }
bool ina(H t, int h, int w) { return 0 <= t.fs && t.fs < h && 0 <= t.sc && t.sc < w; }
bool ina(int t, int l, int r) { return l <= t && t < r; }
ll gcd(ll i, ll j) { return j ? gcd(j, i % j) : i; }
ll popcount(ll x) {
int sum = 0; for (int i = 0; i < 60; i++)if ((1ll << i) & x) sum++;
return sum;
}
template<typename T>
class csum {
vec<T> v;
public:
csum(vec<T>& a) :v(a) { build(); }
csum(){}
void init(vec<T>& a) { v = a; build(); }
void build() {
for (int i = 1; i < v.size(); i++) v[i] += v[i - 1];
}
T a(int l, int r) {
if (r < l) return 0;
return v[r] - (l == 0 ? 0 : v[l - 1]);
}//[l,r]
T b(int l, int r) {
return a(l, r - 1);
}//[l,r)
T a(pair<int, int>t) {
return a(t.first, t.second);
}
T b(pair<int, int>t) {
return b(t.first, t.second);
}
};
class mint {
public:ll v;
mint(ll v = 0) { s(v % mod + mod); }
constexpr static int mod = (ll)1e9 + 7;
constexpr static int fn_ = (ll)2e6 + 5;
static mint fact[fn_], comp[fn_];
mint pow(int x) const {
mint b(v), c(1);
while (x) {
if (x & 1) c *= b;
b *= b;
x >>= 1;
}
return c;
}
inline mint& s(int vv) {
v = vv < mod ? vv : vv - mod;
return *this;
}
inline mint inv()const { return pow(mod - 2); }
inline mint operator-()const { return mint() - *this; }
inline mint& operator+=(const mint b) { return s(v + b.v); }
inline mint& operator-=(const mint b) { return s(v + mod - b.v); }
inline mint& operator*=(const mint b) { v = v * b.v % mod; return *this; }
inline mint& operator/=(const mint b) { v = v * b.inv().v % mod; return *this; }
inline mint operator+(const mint b) const { return mint(v) += b; }
inline mint operator-(const mint b) const { return mint(v) -= b; }
inline mint operator*(const mint b) const { return mint(v) *= b; }
inline mint operator/(const mint b) const { return mint(v) /= b; }
friend ostream& operator<<(ostream& os, const mint& m) {
return os << m.v;
}
friend istream& operator>>(istream& is, mint& m) {
int x; is >> x; m = mint(x);
return is;
}
bool operator<(const mint& r)const { return v < r.v; }
bool operator>(const mint& r)const { return v > r.v; }
bool operator<=(const mint& r)const { return v <= r.v; }
bool operator>=(const mint& r)const { return v >= r.v; }
bool operator==(const mint& r)const { return v == r.v; }
bool operator!=(const mint& r)const { return v != r.v; }
explicit operator bool()const { return v; }
explicit operator int()const { return v; }
mint comb(mint k) {
if (k > * this) return mint();
if (!fact[0]) combinit();
if (v >= fn_) {
if (k > * this - k) k = *this - k;
mint tmp(1);
for (int i = v; i >= v - k.v + 1; i--) tmp *= mint(i);
return tmp * comp[k.v];
}
return fact[v] * comp[k.v] * comp[v - k.v];
}//nCk
mint perm(mint k) {
if (k > * this) return mint();
if (!fact[0]) combinit();
if (v >= fn_) {
mint tmp(1);
for (int i = v; i >= v - k.v + 1; i--) tmp *= mint(i);
return tmp;
}
return fact[v] * comp[v - k.v];
}//nPk
static void combinit() {
fact[0] = 1;
for (int i = 1; i < fn_; i++) fact[i] = fact[i - 1] * mint(i);
comp[fn_ - 1] = fact[fn_ - 1].inv();
for (int i = fn_ - 2; i >= 0; i--) comp[i] = comp[i + 1] * mint(i + 1);
}
}; mint mint::fact[fn_], mint::comp[fn_];
//--------------------------------------------------------------
class LCA {
#define H pair<int, int>
#define fs first
#define sc second
int n;
H table[400000][25];
vec<H>e[400000];
int dep[400000];
public:
void init(const int& size) {
n = size;
for (int i = 0; i <= n; i++) {
e[i].clear(); dep[i] = 0;
for (int j = 0; j < 25; j++)
table[i][j] = H{ -1,-1 };
}
}
void add_edge(int u, int v, int r) {
e[u].pb(H{ v,r });
e[v].pb(H{ u,r });
}
void add_edge(int u, int v) {
e[u].pb(H{ v,1 });
e[v].pb(H{ u,1 });
}
void build(const int st) {
dfs(st, -1, 0);
for (int j = 0; j < 24; j++)for (int i = 0; i <= n; i++) {
if (table[i][j].fs > -1) table[i][j + 1] = H{ table[table[i][j].fs][j].fs, table[i][j].sc + table[table[i][j].fs][j].sc };
}
}
H get(int x, int y) {
if (dep[x] > dep[y]) swap(x, y);
int sum = 0;
for (int i = 24; i >= 0; i--) {
if (((dep[y] - dep[x]) >> i) & 1) {
sum += table[y][i].sc;
y = table[y][i].fs;
}
}
if (x == y) return H{ x,sum };
for (int i = 24; i >= 0; i--) {
if (table[x][i].fs != table[y][i].fs) {
sum += table[x][i].sc + table[y][i].sc;
x = table[x][i].fs, y = table[y][i].fs;
}
}
return H{ table[x][0].fs, sum + table[x][0].sc + table[y][0].sc };
}
int operator[](const int& x) const {
return dep[x];
}
private:
void dfs(int v, int p, int d) {
table[v][0] = H{ p,-1 };
dep[v] = d;
for (auto& to : e[v]) {
if (to.fs != p) dfs(to.fs, v, d + 1);
else table[v][0].sc = to.sc;
}
}
};
auto RUQ = [](int& num, int x, int width) {num = x; };
auto RAQ = [](int& num, int x, int width) {num += x; };
auto RCMXQ = [](int& num, int x, int width) {num = max(num, x); };
auto RCMNQ = [](int& num, int x, int width) {num = min(num, x); };
auto RASQ = [](int& num, int x, int width) {num += (x * width); };
auto RUSQ = [](int& num, int x, int width) {num = (x * width); };
auto RSQ = [](int x, int y)->int {return x + y; };
auto RMXQ = [](int x, int y)->int {return max(x, y); };
auto RMNQ = [](int x, int y)->int {return min(x, y); };
class Segtree {
#define SEG_SIZE 900000
using F = function<void(int&, int, int)>;
using T = function<int(int, int)>;
int siz, rr, zer, zer2;
int dat[SEG_SIZE], lazy[SEG_SIZE];
bool updated[SEG_SIZE];
F upd; T qur;
public:
//for update, for query
void init(int size, F update, T query, int zero, int zero2) {
siz = size, upd = update, qur = query, zer = zero2, zer2 = zero;
rr = 1; while (rr < size) rr *= 2;
for (int i = 0; i < SEG_SIZE; i++) dat[i] = zer, lazy[i] = zer2, updated[i] = 0;
}
void rmnq(int n) { init(n, RUQ, RMNQ, 0, inf); }
void rmxq(int n) { init(n, RUQ, RMXQ, 0, -inf); }
template<class Iterator>
void build(const Iterator st, const Iterator ed) {
Iterator it = st; int cur = rr - 1;
while (it != ed) dat[cur++] = (*it++);
for (int i = rr - 2; i >= 0; i--)
dat[i] = qur(dat[i * 2 + 1], dat[i * 2 + 2]);
}
void build(vector<int>v) {
for (int i = 0; i < min((int)v.size(), siz); i++)
dat[i + rr - 1] = v[i];
for (int i = rr - 2; i >= 0; i--)
dat[i] = qur(dat[i * 2 + 1], dat[i * 2 + 2]);
}
void update(int a, int b, int x) {
update(0, a, b, 0, rr, x);
}
void change(int a, int x) {
change2(a, x);
}//一点更新
int query(int a, int b) {
return query(0, a, b, 0, rr);
}
int lower_bound(int a, int b, function<bool(int)>comp) {
return lower_bound(0, a, b, 0, rr, comp);
}
int upper_bound(int a, int b, function<bool(int)>comp) {
return upper_bound(0, a, b, 0, rr, comp);
}
int operator[](const int i) {
return query(i, i + 1);
}
private:
void eval(int i, int l, int r) {
if (!updated[i]) return;
if (r - l > 1) {
upd(lazy[i * 2 + 1], lazy[i], 1);
upd(lazy[i * 2 + 2], lazy[i], 1);
updated[i * 2 + 1] = updated[i * 2 + 2] = 1;
}
upd(dat[i], lazy[i], min(r, siz) - l);
lazy[i] = zer2;
updated[i] = 0;
}
void update(int i, int a, int b, int l, int r, int x) {
eval(i, l, r);
if (b <= l || r <= a) return;
if (a <= l && r <= b) {
upd(lazy[i], x, 1); updated[i] = 1;
eval(i, l, r);
return;
}
update(i * 2 + 1, a, b, l, (l + r) / 2, x);
update(i * 2 + 2, a, b, (l + r) / 2, r, x);
dat[i] = qur(dat[i * 2 + 1], dat[i * 2 + 2]);
}
void change2(int a, int x) {
query(a, a + 1);
int t = a + rr - 1;
dat[t] = x;
while (t > 0) {
t = (t - 1) / 2;
dat[t] = qur(dat[t * 2 + 1], dat[t * 2 + 2]);
}
}
int query(int i, int a, int b, int l, int r) {
eval(i, l, r);
if (b <= l || r <= a) return zer;
if (a <= l && r <= b) return dat[i];
return qur(query(i * 2 + 1, a, b, l, (l + r) / 2),
query(i * 2 + 2, a, b, (l + r) / 2, r));
}
int lower_bound(int i, int a, int b, int l, int r, function<bool(int)>comp) {
eval(i, l, r);
if (b <= l || r <= a || !comp(dat[i])) return siz;
if (r - l == 1) return l;
int tmp = lower_bound(i * 2 + 1, a, b, l, (l + r) / 2, comp);
if (tmp < siz) return tmp;
return lower_bound(i * 2 + 2, a, b, (l + r) / 2, r, comp);
}
int upper_bound(int i, int a, int b, int l, int r, function<bool(int)>comp) {
eval(i, l, r);
if (b <= l || r <= a || !comp(dat[i])) return 0;
if (r - l == 1) return r;
int tmp = upper_bound(i * 2 + 2, a, b, (l + r) / 2, r, comp);
if (tmp > 0) return tmp;
return upper_bound(i * 2 + 1, a, b, l, (l + r) / 2, comp);
}
} seg;
//---------------------------------------------------------------------
int n, k;
vi a;
vec<H>e;
LCA lca;
void generate() {
cin >> n >> k;
rep(i, k) a.pb(read() - 1);
rep(i, n - 1) {
e.pb(readh(1));
}
}
int solve() {
//前半を固定すると、LCAは右端を伸ばすときに徐々に登っていき、最終的に右端と一致するようになる
//一致した後の最大値は、RMQをすればよいから、セグ木
lca.init(n);
rep(i, n - 1) lca.add_edge(e[i].fs, e[i].sc);
lca.build(0);
seg.init(k, RUQ, RMXQ, 0, -inf);
int ans = 0, ance = a[0];
vi la(k, a[k - 1]);
seg.update(k - 1, k, lca[a[k - 1]] + 1);
ans = lca[a[k - 1]] + 1;
for (int i = k - 2; i >= 0; i--) {
la[i] = lca.get(la[i + 1], a[i]).fs;
seg.update(i, i + 1, lca[la[i]] + k - i);
chmax(ans, lca[la[i]] + k - i);
}
rep(i, k - 1) {
ance = lca.get(ance, a[i]).fs;
chmax(ans, i + 1 + lca[ance]);
int tmp = lca.get(ance, a[k - 1]).fs;
int ok = k - 1, ng = i, mid;
while (ok - ng > 1) {
mid = (ok + ng) / 2;
if (lca.get(tmp, la[mid]).fs == tmp) ok = mid;
else ng = mid;
}
chmax(ans, (k - ok) + i + 1 + lca[tmp]);
chmax(ans, i + 1 + seg.query(i + 1, ok));
chmax(ans, i + 1 + lca[ance]);
//segは、lca[]+人数
}
return ans;
}
signed main() {
generate();
int ans = solve();
cout << ans << endl;
}