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14402. 야근 - Useful Blog

#BOJ#C++

14402. 야근

written by Useful·BOJ 14402


c
#include  <bits/stdc++.h>

using namespace std;

int main(){
    cin.tie(NULL);
    cout.tie(NULL);
    ios_base::sync_with_stdio(false);

    int N;
    cin >>

N

;

int

ans

=

0

;

map

<

string

,

int

>

data

;

for

(

int

i

=

0

;

i

<

N

;

i

++

)

{

string A

,

B

;

cin

>>

A

>>

B

;

if

(

B

==

"+"

)

{

data

[

A

]

++

;

}

else

if

(

data

[

A

]

)

{

data

[

A

]

--

;

}

else

{

ans

++

;

}

}

for

(

auto

iter

=

data

.

begin

(

)

;

iter

!=

data

.

end

(

)

;

iter

++

)

{

ans

+=

iter

->

second

;

}

cout

<<

ans

<<

"\n"

;

return

0

;

}