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Solution : in Java
import java.util.Scanner;
public class BitPlusPlus {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int x = 0;
while(n-->0){
String str = sc.next();
switch(str){
case "X++":
case "++X": x++;break;
case "X--":
case "--X":x--;break;
}
}
System.out.println(x);
}
}
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