Bit++ CodeForces

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A. Bit++
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.

The language is that peculiar as it has exactly one variable, called x. Also, there are two operations:

  • Operation ++ increases the value of variable x by 1.
  • Operation -- decreases the value of variable x by 1.

A statement in language Bit++ is a sequence, consisting of exactly one operation and one variable x. The statement is written without spaces, that is, it can only contain characters "+", "-", "X". Executing a statement means applying the operation it contains.

A programme in Bit++ is a sequence of statements, each of them needs to be executed. Executing a programme means executing all the statements it contains.

You're given a programme in language Bit++. The initial value of x is 0. Execute the programme and find its final value (the value of the variable when this programme is executed).

Input

The first line contains a single integer n (1 ≤ n ≤ 150) — the number of statements in the programme.

Next n lines contain a statement each. Each statement contains exactly one operation (++ or --) and exactly one variable x (denoted as letter «X»). Thus, there are no empty statements. The operation and the variable can be written in any order.

Output

Print a single integer — the final value of x.

Examples
input
1
++X
output
1
input
2
X++
--X
output
0


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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