CF 282A bit++
2016-02-27 21:12
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极其水的一道语法题;
就是输入然后判断增加减少;
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 variablex by 1.
Operation -- decreases the value of variablex by 1.
A statement in language Bit++ is a sequence, consisting of exactly one operation and one variablex. 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
Output
Input
Output
[/code]
就是输入然后判断增加减少;
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 variablex by 1.
Operation -- decreases the value of variablex by 1.
A statement in language Bit++ is a sequence, consisting of exactly one operation and one variablex. 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
AC代码:
#include <bits/stdc++.h> using namespace std ; int main() { char a[4]; int x = 0 ; int n ; cin>>n; while(n--) { cin>>a; if(a[0]=='+'||a[1]=='+') { x++; } else if(a[0]=='-'||a[1]=='-') { x--; } } cout<<x<<endl; return 0 ; }
[/code]
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