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LeetCode Climbing Stairs
You are climbing a stair case. It takes n steps to reach to the top.
Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?
1 public class Solution { 2 public int climbStairs(int n) { 3 int f1,f2; 4 int res=0; 5 if (n==1) { 6 return 1; 7 } 8 if (n==2) { 9 return 2;10 }11 f1=1;12 f2=2;13 for (int i = 3; i <= n; i++) {14 res=f1+f2;15 f1=f2;16 f2=res;17 }18 return res;19 }20 }
LeetCode Climbing Stairs
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