13 more wordsMoney is going digital – it’s as simple as that. As Sweden considers a national digital currency, we discuss the implications for the future of eCommerce!

## Tags » BF's

#### Digital Currencies, Bitcoin, and the Future of eCommerce

#### Ignorance = Acceptance = Bliss

At the halfway house I live at, I was assigned some bedding when I arrived… a pillow, fitted sheet, top sheet and blanket…

Being a still detoxing, ungrateful jerk, I refused the pillow… still not sure why, but I went a week without one until I broke down and got one from my parents. 380 more words

#### 10653 - Bombs! NO they are Mines!!

#Solution

190 more words#include<bits/stdc++.h>

using namespace std;

int r,c;

#define cln(a) memset(a,0,sizeof a)

int dx[]={+1,-1,0,0};

int dy[]={0,0,-1,+1};

#define uu first

#define vv second

#define pii pair<int,int>

#### Course Schedule

There are a total of n courses you have to take, labeled from `0`

to `n - 1`

.

Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: … 407 more words

#### Topological Sorting Related

拓扑排序以及相关题目：

拓扑排序

- For each directed edge
`A -> B`

in graph, A must before B in the order list. - The FIRST node in the order can be any node in the graph with NO nodes direct to it. 198 more words

Given a positive integer n, find the least number of perfect square numbers (for example, `1, 4, 9, 16, ...`

) which sum to n. 10 more words

Given `n`

nodes labeled from `0`

to `n - 1`

and a list of undirected edges (each edge is a pair of nodes), write a function to check whether these edges make up a valid tree. 95 more words