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public class Ch1 {
public static void main(String[] args) {
System.out.println(increment_decrement(new String[]{"--x", "x++", "x++"}));
System.out.println(increment_decrement(new String[]{"x++", "++x", "x++"}));
System.out.println(increment_decrement(new String[]{"x++", "++x", "--x", "x--"}));
}
private static int increment_decrement(String[] arr) {
int x = 0;
for (String s : arr) {
if (s.contains("++")) x++;
else x--;
}
return x;
}
}
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