結果
問題 | No.510 二次漸化式 |
ユーザー | anta |
提出日時 | 2018-04-06 19:19:59 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 101 ms / 3,000 ms |
コード長 | 4,941 bytes |
コンパイル時間 | 1,927 ms |
コンパイル使用メモリ | 178,288 KB |
実行使用メモリ | 35,968 KB |
最終ジャッジ日時 | 2024-06-26 10:49:24 |
合計ジャッジ時間 | 6,158 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 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 30 ms
5,376 KB |
testcase_03 | AC | 29 ms
5,376 KB |
testcase_04 | AC | 30 ms
5,376 KB |
testcase_05 | AC | 30 ms
5,376 KB |
testcase_06 | AC | 44 ms
7,040 KB |
testcase_07 | AC | 44 ms
6,940 KB |
testcase_08 | AC | 44 ms
7,040 KB |
testcase_09 | AC | 43 ms
7,040 KB |
testcase_10 | AC | 16 ms
5,376 KB |
testcase_11 | AC | 15 ms
5,376 KB |
testcase_12 | AC | 15 ms
5,376 KB |
testcase_13 | AC | 16 ms
5,376 KB |
testcase_14 | AC | 16 ms
5,376 KB |
testcase_15 | AC | 15 ms
5,376 KB |
testcase_16 | AC | 58 ms
35,840 KB |
testcase_17 | AC | 59 ms
35,840 KB |
testcase_18 | AC | 58 ms
35,840 KB |
testcase_19 | AC | 59 ms
35,840 KB |
testcase_20 | AC | 58 ms
35,840 KB |
testcase_21 | AC | 57 ms
35,840 KB |
testcase_22 | AC | 57 ms
35,840 KB |
testcase_23 | AC | 86 ms
35,968 KB |
testcase_24 | AC | 85 ms
35,712 KB |
testcase_25 | AC | 84 ms
35,840 KB |
testcase_26 | AC | 87 ms
35,968 KB |
testcase_27 | AC | 83 ms
35,840 KB |
testcase_28 | AC | 83 ms
35,840 KB |
testcase_29 | AC | 83 ms
35,840 KB |
testcase_30 | AC | 83 ms
35,968 KB |
testcase_31 | AC | 99 ms
35,840 KB |
testcase_32 | AC | 99 ms
35,840 KB |
testcase_33 | AC | 101 ms
35,840 KB |
testcase_34 | AC | 65 ms
35,712 KB |
testcase_35 | AC | 56 ms
35,712 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; #define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i)) #define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i)) #define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i)) static const int INF = 0x3f3f3f3f; static const long long INFL = 0x3f3f3f3f3f3f3f3fLL; typedef vector<int> vi; typedef pair<int, int> pii; typedef vector<pair<int, int> > vpii; typedef long long ll; template<typename T, typename U> static void amin(T &x, U y) { if (y < x) x = y; } template<typename T, typename U> static void amax(T &x, U y) { if (x < y) x = y; } template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) { } ModInt(signed sig) { int sigt = sig % MOD; if (sigt < 0) sigt += MOD; x = sigt; } ModInt(signed long long sig) { int sigt = sig % MOD; if (sigt < 0) sigt += MOD; x = sigt; } int get() const { return (int)x; } ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; } ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } }; typedef ModInt<1000000007> mint; struct Matrix { typedef mint Num; static const int MaxN = 4; int hei, wid; Num v[MaxN][MaxN]; Matrix() {} Matrix(int n, int m) : hei(n), wid(m) { memset(v, 0, sizeof(v)); } inline int height() const { return hei; } inline int width() const { return wid; } inline Num& at(int i, int j) { return v[i][j]; } inline const Num& at(int i, int j) const { return v[i][j]; } static Matrix identity(int n) { Matrix A(n, n); rep(i, n) A.at(i, i) = 1; return A; } inline static Matrix identity(const Matrix& A) { return identity(A.height()); } Matrix& operator*=(const Matrix& B) { int n = height(), m = B.width(), p = B.height(); assert(p == width()); const unsigned(*b)[MaxN] = reinterpret_cast<const unsigned(*)[MaxN]>(B.v); Num w[MaxN][MaxN]; unsigned long long pp = (1ULL << 32) % mint::Mod; rep(i, n) { const unsigned *ai = reinterpret_cast<const unsigned*>(v[i]); rep(j, m) { unsigned x0 = 0; unsigned long long x1 = 0; rep(k, p) { unsigned long long y = (unsigned long long)ai[k] * b[k][j]; unsigned long long t = x0 + y; x1 += t >> 32; x0 = t & 0xffffffff; } w[i][j].x = (x0 + x1 % mint::Mod * pp) % mint::Mod; } } memcpy(v, w, sizeof(v)); wid = m; return *this; } }; struct GetRangeSegmentTree { typedef Matrix Val; static Val combineVal(const Val &x, const Val &y) { return Matrix(x) *= y; } static void assignCombineVal(Val &x, const Val &y) { x *= y; } static Val identityVal() { return Matrix::identity(4); } vector<Val> nodes; int n; void init(int n_, const Val &v = Val()) { init(vector<Val>(n_, v)); } void init(const vector<Val> &u) { n = 1; while (n < (int)u.size()) n *= 2; nodes.resize(n, identityVal()); nodes.insert(nodes.end(), u.begin(), u.end()); nodes.resize(n * 2, identityVal()); for (int i = n - 1; i > 0; -- i) nodes[i] = combineVal(nodes[i * 2], nodes[i * 2 + 1]); } Val get(int i) { return nodes[i + n]; } Val getWhole() const { return nodes[1]; } Val getRange(int l, int r) const { Val m = identityVal(); int indices[64]; int k = 0; for (; l && l + (l&-l) <= r; l += l & -l) assignCombineVal(m, nodes[(n + l) / (l&-l)]); for (; l < r; r -= r & -r) indices[k ++] = (n + r) / (r&-r) - 1; while (-- k >= 0) assignCombineVal(m, nodes[indices[k]]); return m; } void set(int i, const Val &x) { i += n; nodes[i] = x; for (i >>= 1; i > 0; i >>= 1) nodes[i] = combineVal(nodes[i * 2], nodes[i * 2 + 1]); } }; int main() { int N; int Q; while (~scanf("%d%d", &N, &Q)) { //b_{i+1}^2 = (y_i b_i + 1)^2 = y_i^2 b_i^2 + 2 y_i b_i + 1 auto getMatrix = [](mint x, mint y) -> Matrix { Matrix A(4, 4); //1 -> 1 A.at(0, 0) = 1; //b_{i+1} A.at(1, 1) = y; A.at(0, 1) = 1; //b_{i+1}^2 A.at(2, 2) = y * y; A.at(1, 2) = y * 2; A.at(0, 2) = 1; //a_{i+1} A.at(3, 3) = 1; A.at(2, 3) = x; return A; }; GetRangeSegmentTree segt; segt.init(N, getMatrix(0, 0)); vector<mint> xs(N), ys(N); for (int ii = 0; ii < Q; ++ ii) { char ty[10]; scanf("%s", ty); if (*ty == 'x' || *ty == 'y') { int i; int v; scanf("%d%d", &i, &v); (*ty == 'x' ? xs[i] : ys[i]) = v; segt.set(i, getMatrix(xs[i], ys[i])); } else if (*ty == 'a') { int i; scanf("%d", &i); auto A = segt.getRange(0, i); Matrix v(1, 4); v.at(0, 0) = 1; v.at(0, 1) = 1; v.at(0, 2) = 1; v.at(0, 3) = 1; v *= A; mint ans = v.at(0, 3); printf("%d\n", ans.get()); } else abort(); } } return 0; }