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Leetcode70.cpp
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68 lines (56 loc) · 1.58 KB
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// Leetcode70.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <iostream>
#include <vector>
using namespace::std;
/*int climbStairs(int n)
{
if(n==1)
return 1;
if(n==2)
return 2;
return climbStairs(n-1)+climbStairs(n-2);
}*/
/*int arr[45];
int climbStairs(int n)
{
if(n==1)
{
arr[n-1]=1;
return 1;
}
if(n==2)
{
arr[n-1]=2;
return 2;
}
if(arr[n-1])
return arr[n-1];
return climbStairs(n-1)+climbStairs(n-2);
}*/
int climbStairs(int n)
{
if (n == 1)
return 1;
if (n == 2)
return 2;
vector<int> v(n);
v[0] = 1; v[1] = 2;
for (int i = 2; i < n; ++i)
v[i] = v[i - 1] + v[i - 2];
return v[n - 1];
}
int main()
{
int res = climbStairs(1);
std::cout << "Hello World!\n";
}
// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu
// Tips for Getting Started:
// 1. Use the Solution Explorer window to add/manage files
// 2. Use the Team Explorer window to connect to source control
// 3. Use the Output window to see build output and other messages
// 4. Use the Error List window to view errors
// 5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
// 6. In the future, to open this project again, go to File > Open > Project and select the .sln file