so_sal　

Description The cows in farmer John's herd are numbered and branded with consecutive integers from 1 to N (1 a;for(n=1;;n++){if( n*(n+1)/2 > a)break;}n--;sum = n*(n+1)/2 - m;while(n

/* * http://sosal.tistory.com/ * made by so_Sal */ Jaeha is writing an operating system for his toys, so they will be able to communicate with each other. However, the wireless chips in his toys are very cheap, so they are prone to transmission errors. Quite frequently, Jaeha is seeing some noises in the transmitted data: some bits get flipped during the transmission process. Jaeha wants to impl..

/* * http://sosal.tistory.com/ * made by so_Sal */ On the planet Zoop, numbers are represented in base 62, using the digits 0, 1, . . . , 9, A, B, . . . , Z, a, b, . . . , z, where A (base 62) = 10 (base 10)B (base 62) = 11 (base 10)z (base 62) = 61 (base 10).Given the digit representation of a number x in base 62, your goal is to determine if x is divisible by 61. 입력 The input test file will co..

/* * http://sosal.tistory.com/ * made by so_Sal */ Description Soundex coding groups together words that appear to sound alike based on their spelling. For example, "can" and "khawn", "con" and "gone" would be equivalent under Soundex coding. Soundex coding involves translating each word into a series of digits in which each digit represents a letter: 1 represents B, F, P, or V 2 represents C, G..

/* * http://sosal.tistory.com/ * made by so_Sal */ IP AddressTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 18283Accepted: 10535DescriptionSuppose you are reading byte streams from any device, representing IP addresses. Your task is to convert a 32 characters long sequence of '1s' and '0s' (bits) to a dotted decimal format. A dotted decimal format for an IP address is form by grouping ..

/* * http://sosal.tistory.com/ * made by so_Sal */ http://www.acmicpc.net/problem/1920 문제 N개의 정수 A[1], A[2], …, A[N]이 주어져 있을 때, 이 안에 X라는 정수가 존재하는지 알아내는 프로그램을 작성하시오. 입력 첫째 줄에 자연수 N(1≤N≤100,000)이 주어진다. 다음 줄에는 N개의 정수 A[1], A[2], …, A[N]이 주어진다. 다음 줄에는 M(1≤M≤100,000)이 주어진다. 다음 줄에는 M개의 수들이 주어지는데, 이 수들이 A안에 존재하는지 알아내면 된다. 모든 정수들의 범위는 int 로 한다. 출력 M개의 줄에 답을 출력한다. 존재하면 1을, 존재하지 않으면 0을 출력한다. 예제 입력54 1 5 2..

/* * http://sosal.tistory.com/ * made by so_Sal */ Gene expression data로부터 데이터를 읽어와 r, d value에 따라 사용하고자 하는 DNA를 선별 data

/* * http://sosal.tistory.com/ * made by so_Sal */ 샘플데이터 랜덤 생성:> sample(1:5, size=5, replace=FALSE)[1] 1 5 3 2 4 > sample(1:5, size=5, replace=TRUE)[1] 5 2 3 5 2> for loop로 sample 데이터의 합 구하기: > num = sample(1:20, size=10, replace=TRUE)> num [1] 5 13 19 5 2 2 14 17 17 10 > for ( i in 1:10 )+ sum = sum+num[i]> sum[1] 204 함수 정의하기:> Mysum = function(x,y)+ {+ return(x+y)+ }> > Mysum(3,5)[1] 8

/* * http://sosal.tistory.com/ * made by so_Sal */ R프로그래밍에서는 간단한 통계함수들이 이미 구현되어진 상태로 주어집니다.scan(), plot(), sd(), median(), sort(). 함수들에 대한 설명은 help() 함수를 통해 자세한 정보를 알 수 있습니다. ex)───────────────────────────────────────────────────> help(sd)> Standard DeviationDescriptionThis function computes the standard deviation of the values in x. If na.rm is TRUE then missing values are removed before comput..

/* * http://sosal.tistory.com/ * made by so_Sal */ R 프로그래밍 개발환경은 아래에서 받을 수 있습니다. http://cran.r-project.orgn Download the precompiled binary distribution of the base system 주석처리: # 변수선언:변수명 = 값변수명 x = 3> y x+y[1] 9 벡터선언: function c() creates a vector> num = c(100,500,1200)> num[1] 100 500 1200 벡터연산:> x num num/x[1] 20 100 240 벡터변수 확인:> num num[1][1] 100> num[2][1] 500> num[3][1] 1200 Sequence의 선언..