22 lines
377 B
C++
22 lines
377 B
C++
#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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using namespace std;
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char buffer[1024];
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int main()
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{
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while(scanf("%s",buffer)==1)
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{
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int idt=strstr(buffer,"B")-buffer;
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int cnt=0;
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for(int i=idt-1;i>=0;i--)
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{
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if(buffer[i]=='(') cnt++;
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else cnt--;
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}
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printf("%d\n",cnt);
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}
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return 0;
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}
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