結果
| 問題 |
No.803 Very Limited Xor Subset
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-03-17 22:14:06 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
AC
|
| 実行時間 | 4 ms / 2,000 ms |
| コード長 | 3,971 bytes |
| コンパイル時間 | 1,645 ms |
| コンパイル使用メモリ | 121,228 KB |
| 実行使用メモリ | 6,944 KB |
| 最終ジャッジ日時 | 2024-06-13 04:21:57 |
| 合計ジャッジ時間 | 2,511 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 43 |
ソースコード
import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
enum MO = 10L^^9 + 7;
int N, M, X;
int[] A;
int[] T, L, R;
int[][] graph;
int[] color;
bool[] keep;
bool dfs(int u, int c) {
color[u] = c;
foreach (i; graph[u]) {
const v = L[i] ^ R[i] ^ u;
const cc = c ^ T[i];
if (color[v] == -1) {
color[v] = cc;
keep[i] = true;
if (!dfs(v, cc)) {
return false;
}
} else {
if (color[v] != cc) {
return false;
}
}
}
return true;
}
void main() {
try {
for (; ; ) {
N = readInt();
M = readInt();
X = readInt();
A = new int[N];
foreach (j; 0 .. N) {
A[j] = readInt();
}
T = new int[M];
L = new int[M];
R = new int[M];
foreach (i; 0 .. M) {
T[i] = readInt();
L[i] = readInt() - 1;
R[i] = readInt();
}
graph = new int[][N + 1];
foreach (i; 0 .. M) {
graph[L[i]] ~= i;
graph[R[i]] ~= i;
}
color = new int[N + 1];
color[] = -1;
keep = new bool[M];
bool ok = true;
foreach (u; 0 .. N + 1) {
if (color[u] == -1) {
ok = ok && dfs(u, 0);
}
}
long ans;
if (ok) {
debug {
writeln("color = ", color);
writeln("keep = ", keep);
}
int[][] a;
foreach (pos; 0 .. 32) {
auto row = new int[N + 1];
foreach (j; 0 .. N) {
row[j] = (A[j] >> pos) & 1;
}
row[N] = (X >> pos) & 1;
a ~= row;
}
foreach (i; 0 .. M) {
if (keep[i]) {
auto row = new int[N + 1];
foreach (j; L[i] .. R[i]) {
row[j] = 1;
}
row[N] = T[i];
a ~= row;
}
}
const m = cast(int)(a.length);
debug {
writeln("a = ");
foreach (i; 0 .. m) {
writeln(a[i]);
}
}
int r;
foreach (h; 0 .. N) {
foreach (i; r .. m) {
if (a[i][h]) {
swap(a[r], a[i]);
break;
}
}
if (r < m && a[r][h]) {
foreach (i; r + 1 .. m) {
if (a[i][h]) {
foreach (j; h .. N + 1) {
a[i][j] ^= a[r][j];
}
}
}
++r;
}
}
debug {
writeln("a = ");
foreach (i; 0 .. m) {
writeln(a[i]);
}
writeln("r = ", r);
}
bool zero = true;
foreach (i; r .. m) {
zero = zero && !a[i][N];
}
if (zero) {
ans = 1;
foreach (k; 0 .. N - r) {
(ans *= 2) %= MO;
}
}
}
writeln(ans);
}
} catch (EOFException e) {
}
}