A. Bit++
http://codeforces.com/problemset/problem/282/A
time limit per test
memory limit per test
input
output
The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.
x. Also, there are two operations:
- ++ increases the value of variable x
- -- decreases the value of variable x
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.
x is 0. Execute the programme and find its final value (the value of the variable when this programme is executed).
Input
n (1 ≤ n ≤ 150)
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
x.
Sample test(s)
input
1 ++X
output
1
input
2 X++ --X
output
0
water.
完整代码：
/*30ms,0KB*/
#include<cstdio>
int main()
{
int n, x = 0;
char str[4];
scanf("%d", &n);
while (n--)
{
scanf("%s", str);
if (str[1] == '+')
++x;
else
--x;
}
printf("%d", x);
return 0;
}
