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#include <stdio.h> int main(void) { int n, i, qtd, nroant, nro; scanf("%d", &n); i=0; qtd=0; nroant=-1; while (i<n){ scanf("%d", &nro); if(nro != nroant) qtd=qtd+1; nroant=nro; i++; } printf("%d\n", qtd); return 0; }
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