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special-positions-in-a-binary-matrix.rs
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special-positions-in-a-binary-matrix.rs
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struct Solution;
impl Solution {
pub fn num_special(mat: Vec<Vec<i32>>) -> i32 {
let mut ans = 0;
for i in 0..mat.len() {
if mat[i].iter().filter(|x| **x == 1).count() != 1 {
continue;
}
for j in 0..mat[i].len() {
if mat[i][j] != 1 {
continue;
}
let mut vec = vec![];
for v in &mat {
vec.push(v[j]);
}
if vec.iter().filter(|x| **x == 1).count() != 1 {
continue;
}
ans += 1;
}
}
ans
}
}
fn main() {
println!(
"{}",
Solution::num_special(vec![vec![1, 0, 0], vec![0, 0, 1], vec![1, 0, 0]])
);
println!(
"{}",
Solution::num_special(vec![vec![1, 0, 0], vec![0, 1, 0], vec![0, 0, 1]])
);
println!(
"{}",
Solution::num_special(vec![
vec![0, 0, 0, 1],
vec![1, 0, 0, 0],
vec![0, 1, 1, 0],
vec![0, 0, 0, 0]
])
);
println!(
"{}",
Solution::num_special(vec![
vec![0, 0, 0, 0, 0],
vec![1, 0, 0, 0, 0],
vec![0, 1, 0, 0, 0],
vec![0, 0, 1, 0, 0],
vec![0, 0, 0, 1, 1]
])
);
}
#[cfg(test)]
mod tests {
use crate::Solution;
#[test]
fn test() {
assert_eq!(
1,
Solution::num_special(vec![vec![1, 0, 0], vec![0, 0, 1], vec![1, 0, 0]])
);
assert_eq!(
3,
Solution::num_special(vec![vec![1, 0, 0], vec![0, 1, 0], vec![0, 0, 1]])
);
assert_eq!(
2,
Solution::num_special(vec![
vec![0, 0, 0, 1],
vec![1, 0, 0, 0],
vec![0, 1, 1, 0],
vec![0, 0, 0, 0]
])
);
assert_eq!(
3,
Solution::num_special(vec![
vec![0, 0, 0, 0, 0],
vec![1, 0, 0, 0, 0],
vec![0, 1, 0, 0, 0],
vec![0, 0, 1, 0, 0],
vec![0, 0, 0, 1, 1]
])
);
}
}