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#!/usr/bin/awk -f
function setlights(val, toggle) {
for (i = from[1]; i <= to[1]; i++) {
for (j = from[2]; j <= to[2]; j++)
lights[i][j] = toggle ? (lights[i][j] ? 0 : 1) : val
}
}
$1 == "toggle" { split($2, from, ","); split($4, to, ","); setlights(0, 1) }
$2 ~ /on|off/ { split($3, from, ","); split($5, to, ",") }
$2 == "on" { setlights(1, 0) }
$2 == "off" { setlights(0, 0) }
END {
for (i = 0; i <= 999; i++) {
for (j = 0; j <= 999; j++)
count += lights[i][j]
}
print count
}
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