Editorial for 加加減減
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Submitting an official solution before solving the problem yourself is a bannable offence.
Submitting an official solution before solving the problem yourself is a bannable offence.
Author:
Subtask 1
去掉結尾的 =。（WA 20%）
Subtask 1~4
Solution 1
直接模擬即可。（AC 100%）
Solution 2
另個作法是使用某些語言的 eval。（AC 100%）
標程
Python3 eval（by ）
print(eval(input()[:-1]))
Scala + JSR-223 eval Javascript（by ）
object x001 extends App {
val e = new javax.script.ScriptEngineManager().getEngineByExtension("js")
println(e.eval(scala.io.StdIn.readLine().dropRight(1)))
}
C++ 模擬 (by ）
#include<bits/stdc++.h>
using namespace std;
int main()
{
cin.tie(0);ios_base::sync_with_stdio(false);
int ans,x;
char c;
cin>>ans;
while(cin>>c&&c!='=')
{
cin>>x;
if(c=='+')ans+=x;
else if(c=='-')ans-=x;
}
cout<<ans<<endl;
return 0;
}
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