Description
A checksum is an algorithm that scans a packet of data and returns
a single number. The idea is that if the packet is changed, the
checksum will also change, so checksums are often used for
detecting transmission errors, validating document contents, and in
many other situations where it is necessary to detect undesirable
changes in data. For this problem, you will implement a checksum
algorithm called Quicksum. A Quicksum packet allows only uppercase
letters and spaces. It always begins and ends with an uppercase
letter. Otherwise, spaces and letters can occur in any combination,
including consecutive spaces. A Quicksum is the sum of the products
of each character's position in the packet times the character's
value. A space has a value of zero, while letters have a value
equal to their position in the alphabet. So, A=1, B=2, etc.,
through Z=26. Here are example Quicksum calculations for the
packets "ACM" and "MID CENTRAL": ACM: 1*1 + 2*3 + 3*13 = 46 MID
CENTRAL: 1*13 + 2*9 + 3*4 + 4*0 + 5*3 + 6*5 + 7*14 + 8*20 + 9*18 +
10*1 + 11*12 = 650
Input
The input consists of one or more packets followed by a line
containing only # that signals the end of the input. Each packet is
on a line by itself, does not begin or end with a space, and
contains from 1 to 255 characters.
Output
For each packet, output its Quicksum on a separate line in the
output.
Sample Input
ACM
MID CENTRAL
REGIONAL PROGRAMMING CONTEST
ACN
A C M
ABC
BBC
#
Sample Output
46
650
4690
49
75
14
15
- #include <stdio.h>
- #include <string.h>
- int main()
- {
-
int i,k=0; -
char c[260]; -
while(gets(c)) -
{ -
k=0; -
if(c[0]=='#') break; -
for(i=1; i<=strlen(c); i++) -
{ -
if(c[i-1]!=' ') k=k+i*(c[i-1]-'A'+1); -
} -
printf("%d\n",k); -
} -
return 0; - }