Atcoder Beginner Contest 184B Quizzes 题解

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Simulate directly according to the meaning of the question

#include<cstdio>
#include<iostream>
#include<algorithm>
#include<cstring>
using namespace std;
const int Maxn=200000+10;
int n,m,ans;
char a[Maxn];
inline int read()
{
    
    
	int s=0,w=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){
    
    if(ch=='-')w=-1;ch=getchar();}
	while(ch>='0' && ch<='9')s=(s<<3)+(s<<1)+(ch^48),ch=getchar();
	return s*w;
}
int main()
{
    
    
	n=read(),m=read();
	scanf("%s",a+1);
	for(int i=1;i<=n;++i)
	{
    
    
		if(a[i]=='o')++m;
		else --m;
		if(m<0)m=0;
	}
	printf("%d\n",m);
	return 0;
}