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#include
int main() { int n; scanf("%d", &n); int prethoden = 0; int brojac = 0; for(int i = 0; i < n; i++) { int x; scanf("%d", &x); if(prethoden != 0) { if(prethoden % 2 == 0 && x % 2 == 0) { brojac++; } else if(prethoden % 2 == 1 && x % 2 == 1) { brojac++; } } prethoden = x; } printf("%d\n", brojac); return 0; }
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