#include <stdio.h>
#include <stdlib.h>

int main() {
	int i, sum, tab[100];

	i=0; 
	while (i<100) {
		tab[i] = i+1;
		++i;
	}

	i=0;
	sum = 0;
	do { 
		sum += tab[i];
		++i;	
	} while ((i<100) && (sum < 50));
	
	printf("sum = %d\n", sum);
	
	return 0;
}