Merge pull request #1269 from xiaofei-2020/dp03

添加(0070.爬楼梯.md):增加typescript版本
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程序员Carl
2022-05-18 09:26:44 +08:00
committed by GitHub

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@ -308,7 +308,58 @@ var climbStairs = function(n) {
};
```
TypeScript
> 爬2阶
```typescript
function climbStairs(n: number): number {
/**
dp[i]: i阶楼梯的方法种数
dp[1]: 1;
dp[2]: 2;
...
dp[i]: dp[i - 1] + dp[i - 2];
*/
const dp: number[] = [];
dp[1] = 1;
dp[2] = 2;
for (let i = 3; i <= n; i++) {
dp[i] = dp[i - 1] + dp[i - 2];
}
return dp[n];
};
```
> 爬m阶
```typescript
function climbStairs(n: number): number {
/**
一次可以爬m阶
dp[i]: i阶楼梯的方法种数
dp[1]: 1;
dp[2]: 2;
dp[3]: dp[2] + dp[1];
...
dp[i]: dp[i - 1] + dp[i - 2] + ... + dp[max(i - m, 1)]; 从i-1加到max(i-m, 1)
*/
const m: number = 2; // 本题m为2
const dp: number[] = new Array(n + 1).fill(0);
dp[1] = 1;
dp[2] = 2;
for (let i = 3; i <= n; i++) {
const end: number = Math.max(i - m, 1);
for (let j = i - 1; j >= end; j--) {
dp[i] += dp[j];
}
}
return dp[n];
};
```
### C
```c
int climbStairs(int n){
//若n<=2返回n