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- #include <stdio.h>
- int integer_pow(int num, int tobase) {
- int i_result = 1, i;
- for(i = 0; i < tobase; i++)
- i_result *= num;
- return i_result;
- }
- int main() {
- int i;
- for(i = 0;; i++) {
- int n;
- scanf("%d", &n);
- if(!n)
- break;
- printf("Teste %d\n", i + 1);
- printf("%d\n", integer_pow(2, n) - 1);
- }
- return 0;
- }
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