Codeforces 282A. 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 i.
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

input

2
X++
--X

output

水题打卡

#include <stdio.h>
int main() {
    int m;
    char arr[4];
    while(scanf("%d", &m) != EOF) {
        int num = 0;
        while(m--) {
            scanf("%s", arr);
            if(arr[1] == '+')
                num++;
            else if(arr[1] == '-')
                num--;
        }        
        printf("%d\n", num);
    }
    return 0;
}

来源：CSDN

作者：fastaway

链接：https://blog.csdn.net/weixin_43172803/article/details/104086518

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