結果
問題 |
No.3227 Matrix Query
|
ユーザー |
![]() |
提出日時 | 2025-07-29 01:04:15 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 760 ms / 8,000 ms |
コード長 | 2,733 bytes |
コンパイル時間 | 2,141 ms |
コンパイル使用メモリ | 131,592 KB |
実行使用メモリ | 12,776 KB |
最終ジャッジ日時 | 2025-07-30 16:20:22 |
合計ジャッジ時間 | 17,851 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 28 |
ソースコード
import std.stdio, std.algorithm, std.array, std.conv, std.typecons; void main() { long K, N; { auto tmp = readln.split.to!(long[]); K = tmp[0], N = tmp[1]; } auto A = new Matrix[N]; foreach (n; 0 .. N) { auto row0 = readln.split.to!(long[]), row1 = readln.split.to!(long[]); Matrix M; M[0][0] = row0[0]%K, M[0][1] = row0[1]%K, M[1][0] = row1[0]%K, M[1][1] = row1[1]%K, A[n] = M; } auto Q = readln[0 .. $-1].to!long; auto I = new ulong[Q], Y = new Matrix[Q], L = new ulong[Q], R = new ulong[Q]; foreach (q; 0 .. Q) { auto tmp = readln.split.to!(ulong[]); I[q] = tmp[0], L[q] = tmp[1], R[q] = tmp[2]; auto row0 = readln.split.to!(long[]), row1 = readln.split.to!(long[]); Matrix M; M[0][0] = row0[0]%K, M[0][1] = row0[1]%K, M[1][0] = row1[0]%K, M[1][1] = row1[1]%K, Y[q] = M; } /**************************************** *****************************************/ auto size = 1; while (size < N) size *= 2; auto tree = new SegTree(size, K); foreach (n, mat; A) tree.update(n, mat); foreach (q; 0 .. Q) { tree.update(I[q]-1, Y[q]); auto mat = tree.query(L[q]-1, R[q]); mat[0][0] += mat[0][0] < 0 ? K : 0, mat[1][0] += mat[1][0] < 0 ? K : 0, mat[0][1] += mat[0][1] < 0 ? K : 0, mat[1][1] += mat[1][1] < 0 ? K : 0, writefln("%d %d\n%d %d", mat[0][0], mat[0][1], mat[1][0], mat[1][1]); } } alias Matrix = long[2][2]; Matrix multiply(Matrix a, Matrix b, long mod) { Matrix c; c[0][0] = (a[0][0]*b[0][0] + a[0][1]*b[1][0])%mod, c[0][1] = (a[0][0]*b[0][1] + a[0][1]*b[1][1])%mod, c[1][0] = (a[1][0]*b[0][0] + a[1][1]*b[1][0])%mod, c[1][1] = (a[1][0]*b[0][1] + a[1][1]*b[1][1])%mod; return c; } class SegTree { ulong size; long mod; Matrix[] mats; this (ulong size, long mod) { this.size = size; this.mod = mod; mats.length = 2*size-1; // set to identity foreach (n; 0 .. 2*size-1) { mats[n][0][0] = 1, mats[n][0][1] = 0, mats[n][1][0] = 0, mats[n][1][1] = 1; } } void update(ulong i, Matrix mat) { assert(i < size); i += size-1; mats[i] = mat; while (i > 0) { i = (i-1)/2; // parent mats[i] = multiply(mats[2*i+1], mats[2*i+2], mod); } } // return the product of matrices in [a, b) Matrix query(ulong a, ulong b) { return _query(a, b, 0, 0, size); } // k-th node is the interval [l, r) Matrix _query(ulong a, ulong b, ulong k, ulong l, ulong r) { // out of interval if (r <= a || b <= l) return [ [1, 0], [0, 1] ]; // [l, r) is contained in [a, b) else if (a <= l && r <= b) return mats[k]; // intersects else return multiply( _query(a, b, 2*k+1, l, (l+r)/2), // left child _query(a, b, 2*k+2, (l+r)/2, r), // right child mod ); } }