40 lines
902 B
Rust
40 lines
902 B
Rust
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struct Solution;
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#[inline]
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fn bit(x: i32, b: usize) -> i32 {
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(x >> b) & 1
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}
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impl Solution {
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pub fn maximum_rows(matrix: Vec<Vec<i32>>, num_select: i32) -> i32 {
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let m = matrix.len();
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let n = matrix[0].len();
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// 枚举选择的列
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let mut res = 0;
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for choice in 0..1<<n {
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if choice.count_ones() != num_select {
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continue;
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}
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let mut cnt = 0;
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for i in 0..m {
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let mut f = true;
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for j in 0..n {
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if matrix[i][j] == 1 && bit(choice, j) == 0 {
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f = false;
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break;
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}
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}
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if f {
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cnt += 1;
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}
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}
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res = res.max(cnt);
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}
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res
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}
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}
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fn main() {
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let mut buf = String::new();
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}
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