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#include <stdio.h>
#include <stdlib.h>
int main(void) {
int v[1024] = {0};
for (int i = 0; EOF != scanf("%d,", &v[i]); ++i);
v[1] = 12;
v[2] = 2;
for (int i = 0; v[i] != 99; i += 4) {
switch (v[i]) {
break; case 1: v[v[i + 3]] = v[v[i + 1]] + v[v[i + 2]];
break; case 2: v[v[i + 3]] = v[v[i + 1]] * v[v[i + 2]];
break; default: abort();
}
}
printf("%d\n", v[0]);
}
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