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?
class Solution {
public:
int climbStairs(int n) {
// Start typing your C/C++ solution below
// DO NOT write int main() function
int dp1 = 1, dp2 = 2,dp;
dp = n == 1 ? dp1 : dp2;
for(int i = 3; i <= n; i++){
dp = dp1 + dp2;
dp1 = dp2;
dp2 = dp;
}
return dp;
}
};
原文链接: https://www.cnblogs.com/kwill/p/3182930.html
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