There are to algorithm problem about backtracking.

# 78. Subsets

## Description

Given a set of distinct integers, nums, return all possible subsets.

Note: The solution set must not contain duplicate subsets.

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# Tag: Array

## Leetcode No.78&90 Subsets

# 78. Subsets

## Description

## Leetcode No.48 Rotate Image

# Description

## Princeton Algorithm Assignment 1

## Programming Assignment 1: Percolation

SY -> CS -> LA -> SEA

There are to algorithm problem about backtracking.

Given a set of distinct integers, nums, return all possible subsets.

Note: The solution set must not contain duplicate subsets.

You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Follow up:

Could you do this in-place?

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The page of assignment is following:

http://coursera.cs.princeton.edu/algs4/assignments/percolation.html