oj.uz

답안 #883267

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
883267 2023-12-05T02:31:12 Z marvinthang Sumtree (INOI20_sumtree) C++17
100 / 100
 482 ms 54868 KB 
/*************************************
*    author: marvinthang             *
*    created: 05.12.2023 08:26:16    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
const int MOD = 1e9 + 7;
namespace MODULAR {
    inline void fasterLLDivMod(unsigned long long x, unsigned y, unsigned &out_d, unsigned &out_m) {
        unsigned xh = (unsigned)(x >> 32), xl = (unsigned)x, d, m;
    #ifdef __GNUC__
        asm(
            "divl %4 \n\t"
            : "=a" (d), "=d" (m)
            : "d" (xh), "a" (xl), "r" (y)
        );
    #else
        __asm {
            mov edx, dword ptr[xh];
            mov eax, dword ptr[xl];
            div dword ptr[y];
            mov dword ptr[d], eax;
            mov dword ptr[m], edx;
        };
    #endif
        out_d = d; out_m = m;
    }
    template <class T> T invGeneral(T a, T b) {
        a %= b;
        if (!a) return b == 1 ? 0 : -1;
        T x = invGeneral(b, a);
        return x == -1 ? -1 : ((1 - 1LL * b * x) / a + b) % b;
    }
    template <int MOD> struct ModInt {
        unsigned int val;
        ModInt(void): val(0) {}
        ModInt(const long long &x) { *this = x; }
        ModInt & normalize(const unsigned int &v) {
            val = v >= MOD ? v - MOD : v;
            return *this;
        }
        bool operator ! (void) { return !val; }
        ModInt & operator = (const ModInt &x) { val = x.val; return *this; }
        ModInt & operator = (const long long &x) { return normalize(x % MOD + MOD); }
        ModInt operator - (void) { return ModInt(MOD - val); }
        ModInt & operator += (const ModInt &other) { return normalize(val + other.val); }
        ModInt & operator -= (const ModInt &other) { return normalize(val + MOD - other.val); }
        ModInt & operator /= (const ModInt &other) { return *this *= other.inv(); }
        ModInt & operator *= (const ModInt &other) {
            unsigned dummy;
            fasterLLDivMod((unsigned long long) val * other.val, MOD, dummy, val);
            return *this;
        }
        ModInt operator + (const ModInt &other) const { return ModInt(*this) += other; }
        ModInt operator - (const ModInt &other) const { return ModInt(*this) -= other; }
        ModInt operator * (const ModInt &other) const { return ModInt(*this) *= other; }
        ModInt operator / (const ModInt &other) const { return ModInt(*this) /= other; }
        ModInt pow(long long n) const {
            assert(n >= 0);
            ModInt res = 1, a = *this;
            for (; n; n >>= 1, a *= a) if (n & 1) res *= a;
            return res;
        }
        ModInt inv(void) const {
            int i = invGeneral((int) val, MOD);
            assert(~i);
            return i;
        }
        ModInt & operator ++ (void) { return *this += 1; }
        ModInt & operator -- (void) { return *this -= 1; }
        ModInt operator ++ (int) { ModInt old = *this; operator ++(); return old; }
        ModInt operator -- (int) { ModInt old = *this; operator --(); return old; }
        friend ModInt operator + (const long long &x, const ModInt &y) { return ModInt(x) + y; }
        friend ModInt operator - (const long long &x, const ModInt &y) { return ModInt(x) - y; }
        friend ModInt operator * (const long long &x, const ModInt &y) { return ModInt(x) * y; }
        friend ModInt operator / (const long long &x, const ModInt &y) { return ModInt(x) / y; }
        friend ostream & operator << (ostream &out, const ModInt &x) { return out << x.val; }
        friend istream & operator >> (istream &in, ModInt &x) { long long a; in >> a; x = a; return in; }
        explicit operator bool(void) const { return val; }
        explicit operator int(void) const { return val; }
    };  
    using Modular = ModInt <MOD>;
}
using namespace MODULAR;

// index from 0
template <class T> struct Fenwick {
    int n; vector <T> bit;
    Fenwick(int _n = 0): n(_n), bit(n + 1, 0) {}
    void reset(void) { fill(bit.begin(), bit.end(), 0); }
    void resize(int _n) { bit.assign(_n + 1, 0); }
    void update(int i, T val) { for (++i; i <= n; i += i & -i) bit[i] += val; }
    T get(int i) {
        if (i < 0) return 0;
        T res(0);
        for (i = min(i + 1, n); i > 0; i &= i - 1) res += bit[i];
        return res;
    }
    int upper_bound(T val) {
        int res = 0;
        for (int i = __lg(n); i >= 0; --i) 
            if ((res | MASK(i)) <= n && val >= bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
        return res;
    }
    int lower_bound(T val) {
        int res = 0;
        for (int i = __lg(n); i >= 0; --i)
            if ((res | MASK(i)) <= n && val > bit[res | MASK(i)]) res |= MASK(i), val -= bit[res];
        return res;
    }
};

// end of template

void process(void) {
	int n, r; cin >> n >> r;
	vector <vector <int>> adj(n);
	REP(i, n - 1) {
		int u, v; cin >> u >> v; --u; --v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	vector <int> tags(n, -1);
	tags[0] = r;
	int m = n + r;
	vector <Modular> fact(m + 1), ifact(m + 1);
	fact[0] = 1;
	FORE(i, 1, m) fact[i] = fact[i - 1] * i;
	ifact[m] = fact[m].inv();
	REPD(i, m) ifact[i] = ifact[i + 1] * (i + 1);
	auto C = [&] (int n, int k) -> Modular {
		if (k < 0 || n < k) return 0;
		return fact[n] * ifact[k] * ifact[n - k];
	};
	auto candy = [&] (int n, int k) {
		return C(n + k - 1, k - 1);
	};
	vector <int> tsz(n), tin(n), tout(n), ver(n);
	int t = 0;
	function<void(int)> dfs = [&] (int u) {
		ver[t] = u;
		tin[u] = t++;
		tsz[u] = 1;
		for (int v: adj[u]) {
			adj[v].erase(find(ALL(adj[v]), u));
			dfs(v);
			tsz[u] += tsz[v];
		}
		tout[u] = t;
	};
	dfs(0);
	vector <int> st(n * 4 + 23, -1);
	function<void(int, int, int, int, int)> update = [&] (int i, int l, int r, int p, int v) {
		if (r - l == 1) {
			st[i] = v;
			return;
		}
		int m = l + r >> 1;
		if (p < m) update(i << 1, l, m, p, v);
		else update(i << 1 | 1, m, r, p, v);
		st[i] = max(st[i << 1], st[i << 1 | 1]);
	};
	function<int(int, int, int, int, int)> walk = [&] (int i, int l, int r, int p, int v) {
		if (l >= p || st[i] < v) return -1;
		if (r - l == 1) return ver[l];
		int m = l + r >> 1;
		int res = walk(i << 1 | 1, m, r, p, v);
		if (res == -1) res = walk(i << 1, l, m, p, v);
		return res;
	};
	update(1, 0, n, 0, n);
	Fenwick <long long> sum_st(n), sum_sz(n);
	sum_st.update(0, r);
	sum_sz.update(0, n);
	Modular res = candy(r, n);
	cout << res << '\n';
	int cnt = 0;
	auto add = [&] (int u) {
		long long st = tags[u] - sum_st.get(tout[u] - 1) + sum_st.get(tin[u]);
		long long sz = tsz[u] - sum_sz.get(tout[u] - 1) + sum_sz.get(tin[u]);
		sum_st.update(tin[u], st);
		sum_sz.update(tin[u], sz);
		update(1, 0, n, tin[u], tout[u]);
		if (st < 0) ++cnt;
		else res *= candy(st, sz);
	};
	auto del = [&] (int u) {
		long long st = sum_st.get(tin[u]) - sum_st.get(tin[u] - 1);
		long long sz = sum_sz.get(tin[u]) - sum_sz.get(tin[u] - 1);
		sum_st.update(tin[u], -st);
		sum_sz.update(tin[u], -sz);
		update(1, 0, n, tin[u], -1);
		if (st < 0) --cnt;
		else res /= candy(st, sz);
	};
	
	int q; cin >> q;
	while (q--) {
		int t, u; cin >> t >> u; --u;
		int p = walk(1, 0, n, tin[u], tout[u]);
		if (t == 1) {
			cin >> tags[u];
			del(p); add(u); add(p);
		} else {
			del(p); del(u); add(p);
		}
		cout << (cnt ? 0 : res) << '\n';
	}
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("INOI20_sumtree");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message

Main.cpp: In lambda function:
Main.cpp:193:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  193 |   int m = l + r >> 1;
      |           ~~^~~
Main.cpp: In lambda function:
Main.cpp:201:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  201 |   int m = l + r >> 1;
      |           ~~^~~
Main.cpp: In function 'int main()':
Main.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:248:2: note: in expansion of macro 'file'
  248 |  file("INOI20_sumtree");
      |  ^~~~
Main.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:248:2: note: in expansion of macro 'file'
  248 |  file("INOI20_sumtree");
      |  ^~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 36180 KB Output is correct
2 Correct 88 ms 35152 KB Output is correct
3 Correct 76 ms 34568 KB Output is correct
4 Correct 78 ms 35940 KB Output is correct
5 Correct 85 ms 30284 KB Output is correct
6 Correct 6 ms 3420 KB Output is correct
7 Correct 6 ms 2908 KB Output is correct
8 Correct 3 ms 1884 KB Output is correct
9 Correct 78 ms 25552 KB Output is correct
10 Correct 93 ms 25556 KB Output is correct
11 Correct 86 ms 25680 KB Output is correct
12 Correct 74 ms 22664 KB Output is correct
13 Correct 72 ms 33872 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 3 ms 604 KB Output is correct
7 Correct 3 ms 860 KB Output is correct
8 Correct 3 ms 860 KB Output is correct
9 Correct 5 ms 1116 KB Output is correct
10 Correct 6 ms 1628 KB Output is correct
11 Correct 7 ms 2396 KB Output is correct
12 Correct 7 ms 3164 KB Output is correct
13 Correct 9 ms 2908 KB Output is correct
14 Correct 9 ms 3156 KB Output is correct
15 Correct 9 ms 3420 KB Output is correct
16 Correct 9 ms 3164 KB Output is correct
17 Correct 7 ms 2028 KB Output is correct
18 Correct 9 ms 2704 KB Output is correct
19 Correct 8 ms 2648 KB Output is correct
20 Correct 3 ms 604 KB Output is correct
21 Correct 3 ms 604 KB Output is correct
22 Correct 1 ms 344 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 100 ms 35012 KB Output is correct
2 Correct 116 ms 37240 KB Output is correct
3 Correct 94 ms 37036 KB Output is correct
4 Correct 154 ms 39296 KB Output is correct
5 Correct 257 ms 35464 KB Output is correct
6 Correct 7 ms 3420 KB Output is correct
7 Correct 7 ms 3164 KB Output is correct
8 Correct 6 ms 2136 KB Output is correct
9 Correct 241 ms 29916 KB Output is correct
10 Correct 193 ms 29520 KB Output is correct
11 Correct 196 ms 29376 KB Output is correct
12 Correct 207 ms 27628 KB Output is correct
13 Correct 382 ms 54784 KB Output is correct
14 Correct 405 ms 54632 KB Output is correct
15 Correct 399 ms 54864 KB Output is correct
16 Correct 390 ms 54868 KB Output is correct
17 Correct 403 ms 54864 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 426 ms 29264 KB Output is correct
2 Correct 482 ms 32044 KB Output is correct
3 Correct 446 ms 32440 KB Output is correct
4 Correct 457 ms 32080 KB Output is correct
5 Correct 442 ms 30548 KB Output is correct
6 Correct 431 ms 29984 KB Output is correct
7 Correct 348 ms 16724 KB Output is correct
8 Correct 373 ms 19140 KB Output is correct
9 Correct 420 ms 31828 KB Output is correct
10 Correct 445 ms 32068 KB Output is correct
11 Correct 459 ms 31960 KB Output is correct
12 Correct 361 ms 19160 KB Output is correct
13 Correct 264 ms 17712 KB Output is correct
14 Correct 286 ms 17692 KB Output is correct
15 Correct 297 ms 17492 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 85 ms 36180 KB Output is correct
2 Correct 88 ms 35152 KB Output is correct
3 Correct 76 ms 34568 KB Output is correct
4 Correct 78 ms 35940 KB Output is correct
5 Correct 85 ms 30284 KB Output is correct
6 Correct 6 ms 3420 KB Output is correct
7 Correct 6 ms 2908 KB Output is correct
8 Correct 3 ms 1884 KB Output is correct
9 Correct 78 ms 25552 KB Output is correct
10 Correct 93 ms 25556 KB Output is correct
11 Correct 86 ms 25680 KB Output is correct
12 Correct 74 ms 22664 KB Output is correct
13 Correct 72 ms 33872 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 3 ms 604 KB Output is correct
20 Correct 3 ms 860 KB Output is correct
21 Correct 3 ms 860 KB Output is correct
22 Correct 5 ms 1116 KB Output is correct
23 Correct 6 ms 1628 KB Output is correct
24 Correct 7 ms 2396 KB Output is correct
25 Correct 7 ms 3164 KB Output is correct
26 Correct 9 ms 2908 KB Output is correct
27 Correct 9 ms 3156 KB Output is correct
28 Correct 9 ms 3420 KB Output is correct
29 Correct 9 ms 3164 KB Output is correct
30 Correct 7 ms 2028 KB Output is correct
31 Correct 9 ms 2704 KB Output is correct
32 Correct 8 ms 2648 KB Output is correct
33 Correct 3 ms 604 KB Output is correct
34 Correct 3 ms 604 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 100 ms 35012 KB Output is correct
37 Correct 116 ms 37240 KB Output is correct
38 Correct 94 ms 37036 KB Output is correct
39 Correct 154 ms 39296 KB Output is correct
40 Correct 257 ms 35464 KB Output is correct
41 Correct 7 ms 3420 KB Output is correct
42 Correct 7 ms 3164 KB Output is correct
43 Correct 6 ms 2136 KB Output is correct
44 Correct 241 ms 29916 KB Output is correct
45 Correct 193 ms 29520 KB Output is correct
46 Correct 196 ms 29376 KB Output is correct
47 Correct 207 ms 27628 KB Output is correct
48 Correct 382 ms 54784 KB Output is correct
49 Correct 405 ms 54632 KB Output is correct
50 Correct 399 ms 54864 KB Output is correct
51 Correct 390 ms 54868 KB Output is correct
52 Correct 403 ms 54864 KB Output is correct
53 Correct 426 ms 29264 KB Output is correct
54 Correct 482 ms 32044 KB Output is correct
55 Correct 446 ms 32440 KB Output is correct
56 Correct 457 ms 32080 KB Output is correct
57 Correct 442 ms 30548 KB Output is correct
58 Correct 431 ms 29984 KB Output is correct
59 Correct 348 ms 16724 KB Output is correct
60 Correct 373 ms 19140 KB Output is correct
61 Correct 420 ms 31828 KB Output is correct
62 Correct 445 ms 32068 KB Output is correct
63 Correct 459 ms 31960 KB Output is correct
64 Correct 361 ms 19160 KB Output is correct
65 Correct 264 ms 17712 KB Output is correct
66 Correct 286 ms 17692 KB Output is correct
67 Correct 297 ms 17492 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 457 ms 43036 KB Output is correct
71 Correct 453 ms 43088 KB Output is correct
72 Correct 470 ms 43148 KB Output is correct
73 Correct 458 ms 42952 KB Output is correct
74 Correct 444 ms 42320 KB Output is correct
75 Correct 475 ms 37468 KB Output is correct
76 Correct 429 ms 32128 KB Output is correct
77 Correct 412 ms 31592 KB Output is correct
78 Correct 404 ms 29804 KB Output is correct
79 Correct 478 ms 37104 KB Output is correct
80 Correct 445 ms 35704 KB Output is correct
81 Correct 458 ms 36612 KB Output is correct
82 Correct 344 ms 30800 KB Output is correct
83 Correct 378 ms 43088 KB Output is correct
84 Correct 365 ms 41300 KB Output is correct
85 Correct 365 ms 41588 KB Output is correct