public class Solution {
public int rectCover(int target) {
if (target <= 2) {
return target;
}
int[] dp = new int[target + 1];
dp[0] = 0;
dp[1] = 1;
dp[2] = 2;
for (int i = 3; i <= target; i++) {
dp[i] = dp[i - 1] + dp[i - 2];
}
return dp[target];
}
}