```
int *twoSum( int numbers[], int n, int target ){
int i, j;
for( i = 0; i < n; i++ ){
for( j = i + 1; j < n; j++ ){
if( ((numbers[i] + numbers[j]) == target)
&& (numbers[i] < numbers[j]) ){
printf("index1 = %d, index2 = %d\n",i+1, j+1);
break;
}
}
}
return 0;
```

}