cf978b File Name "array operation/sequence to determine the number of ' X ' occurrences of >=3 times"

cf978b File Name
"Analysis": Set the Counter CNT, count the number of X, encountered non-X, if cnt>=3 words accumulated more than the number, counter clear 0; If the last cnt>=3 description did not encounter non-X, then the part is X, output ans+=cnt-2
"Code":

#include<bits/stdc++.h>using namespace std;const int  INF =  0x3f3f3f3f;#define ms(a,b) memset(a,b,sizeof(a))#define rep(i,a,b) for(int i=(a); i<(b); i++)//#define run(i,a,b) for(int i=(a); i<=(b); i++)const int N = 1e5+5;#define ll long longint n;int v[N];int b[N];int a[N];set<int> st;vector<int> vt;int main(){    cin>>n;    string s;    int ans=0,cnt=0;    cin>>s;    for(int i=0;i<s.size();i++)    {        if(s[i]=='x') cnt++;        else        {            if(cnt>=3)  //xxxxxiop            {                ans+=cnt-2;            }            cnt=0;        }    }    if(cnt>=3)//oooxxxxxxxx    {        ans+=cnt-2;    }    cout<<ans<<endl;}

cf978b File Name "array operation/sequence to determine the number of ' X ' occurrences of >=3 times"