43 lines
839 B
Rust
43 lines
839 B
Rust
/**
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* [3206] Alternating Groups I
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*/
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pub struct Solution {}
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// submission codes start here
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impl Solution {
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pub fn number_of_alternating_groups(colors: Vec<i32>) -> i32 {
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let n = colors.len();
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let mut result = 0;
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for i in n..2 * n {
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let left = (i - 1) % n;
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let middle = i % n;
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let right = (i + 1) % n;
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if colors[left] != colors[middle] && colors[right] != colors[middle] {
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result += 1;
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}
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}
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result
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}
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}
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_3206() {
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assert_eq!(0, Solution::number_of_alternating_groups(vec![0, 0, 0]));
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assert_eq!(
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3,
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Solution::number_of_alternating_groups(vec![0, 1, 0, 0, 1])
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);
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}
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}
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