프로젝트 오일러 42번

arr=#words.txt
arr_length=len(arr)
count=0
for a in range(0,arr_length):
    sum=0
    for str_length in range(0,len(arr[a])):
        if(arr[a][str_length].find('A')!=-1):
                sum=sum+1
        elif(arr[a][str_length].find('B')!=-1):
             sum=sum+2
        elif(arr[a][str_length].find('C')!=-1):
            sum=sum+3
        elif(arr[a][str_length].find('D')!=-1):
            sum=sum+4
        elif(arr[a][str_length].find('E')!=-1):
            sum=sum+5
        elif(arr[a][str_length].find('F')!=-1):
            sum=sum+6
        elif(arr[a][str_length].find('G')!=-1):
            sum=sum+7
        elif(arr[a][str_length].find('H')!=-1):
            sum=sum+8
        elif(arr[a][str_length].find('I')!=-1):
            sum=sum+9
        elif(arr[a][str_length].find('J')!=-1):
            sum=sum+10
        elif(arr[a][str_length].find('K')!=-1):
            sum=sum+11
        elif(arr[a][str_length].find('L')!=-1):
            sum=sum+12
        elif(arr[a][str_length].find('M')!=-1):
            sum=sum+13
        elif(arr[a][str_length].find('N')!=-1):
            sum=sum+14
        elif(arr[a][str_length].find('O')!=-1):
            sum=sum+15
        elif(arr[a][str_length].find('P')!=-1):
            sum=sum+16
        elif(arr[a][str_length].find('Q')!=-1):
            sum=sum+17
        elif(arr[a][str_length].find('R')!=-1):
            sum=sum+18
        elif(arr[a][str_length].find('S')!=-1):
            sum=sum+19
        elif(arr[a][str_length].find('T')!=-1):
            sum=sum+20
        elif(arr[a][str_length].find('U')!=-1):
            sum=sum+21
        elif(arr[a][str_length].find('V')!=-1):
            sum=sum+22
        elif(arr[a][str_length].find('W')!=-1):
            sum=sum+23
        elif(arr[a][str_length].find('X')!=-1):
            sum=sum+24
        elif(arr[a][str_length].find('Y')!=-1):
            sum=sum+25
        elif(arr[a][str_length].find('Z')!=-1):
            sum=sum+26
    for i in range(1,20):
        number=(int)(i*(i+1)/2)
        if(number==sum):
            count=count+1
        else:
            continue
print(count)

먼저 리스트의 각 원소마다 '단어값'을 구하고

그것을 일정 크기의 '삼각수'와 비교하여

'삼각단어'의 수를 셌다.