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day 6, AWK solution, small optim

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setop 2022-12-06 20:20:47 +01:00
parent d0a35caa95
commit 76089ce733
1 changed files with 3 additions and 3 deletions
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6
d06/exec.awk
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@ -2,14 +2,14 @@ BEGIN { W = 14 }
{ {
for (i=1; i<=length($1); i++) { for (i=1; i<=length($1); i++) {
window = substr($1,i,W) window = substr($1,i,W)
# compare each char of window to all char of window # compare each char of the window to rest of the window
S = 0 # to count match S = 0 # to count match
for (j=1; j<=W; j++) { for (j=1; j<=W; j++) {
for (k=j; k<=W; k++) { for (k=j+1; k<=W; k++) {
S+= (substr(window,j,1) == substr(window,k,1)) ? 1 : 0 S+= (substr(window,j,1) == substr(window,k,1)) ? 1 : 0
} }
} }
if (S == W) { # if each char match only with itsef if (S == 0) { # if each char match only with itsef
print i + W - 1 print i + W - 1
next # finish next # finish
} }