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char *doleft = data;
char *dorite = strstr(data + 1, "do()");
char *dontleft = data;
char *dontrite = strstr(dontleft + 1, "don't()");
for (;;) {
char *mul = strstr(rest, "mul(");
if (mul) {
while (dorite && (mul > dorite)) {
doleft = dorite;
dorite = strstr(dorite + 1, "do()");
}
while (dontrite && (mul > dontrite)) {
dontleft = dontrite;
dontrite = strstr(dontrite + 1, "don't()");
}
rest = mul + 4;
if (isdigit((unsigned char)rest[0])) {
char *err;
term[0] = (int)strtol(rest, &err, 10);
if (*err == ',') {
if (isdigit((unsigned char)err[1])) {
rest = err + 1;
term[1] = (int)strtol(rest, &err, 10);
if (*err == ')') {
sumproducts += term[0] * term[1];
sumproducts2 += (doleft >= dontleft) * (term[0] * term[1]);
rest = err + 1;
}
}
}
}
} else {
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char *doleft = data;
char *dorite = strstr(data + 1, "do()");
char *dontleft = data;
char *dontrite = strstr(dontleft + 1, "don't()");
for (;;) {
char *mul = strstr(rest, "mul(");
if (mul) {
// make sure `doleft` and `dorite` are to the left and right of `mul`
while (dorite && (mul > dorite)) {
doleft = dorite;
dorite = strstr(dorite + 1, "do()");
}
// also for `dontleft` and `dontrite`
while (dontrite && (mul > dontrite)) {
dontleft = dontrite;
dontrite = strstr(dontrite + 1, "don't()");
}
rest = mul + 4;
if (isdigit((unsigned char)rest[0])) {
char *err;
term[0] = (int)strtol(rest, &err, 10);
if (*err == ',') {
if (isdigit((unsigned char)err[1])) {
rest = err + 1;
term[1] = (int)strtol(rest, &err, 10);
if (*err == ')') {
sumproducts += term[0] * term[1];
// multiply by 0 if closest conditional to the left is "don't()"
sumproducts2 += (doleft >= dontleft) * (term[0] * term[1]);
rest = err + 1;
}
}
}
}
} else {
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