#include <stdio.h>
 
int main(void) {
	// your code goes here
    char *s = "teste teste teste";
    char result[100];
    int i, j;
    for (i=0, j=0; s[i] != '\0'; i++, j++) {
        result[j] = s[i];
        if (s[i] == ' ') { // se achou um espaço
            // precisa adicionar mais 2 espaços (pois um já foi colocado acima)
            for(int k=0; k < 2; k++)
                result[++j] = ' ';
        }
    }
    // adiciona o terminador
    result[j] = '\0';
    printf("%s\n", result);
	return 0;
}
 

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