748 C. Santa Claus and Robot codeforces

#include<bits/stdc++.h>using namespace std;int main(){    int n;    string str;    cin>>n>>str;    int n1=0,n2=0,sum=0;    for(int i=0;i<str.size();i++)    {        if(str[i]=='L')        {            if(n1==2)            {                sum++;                n2=0;            }            n1=1;        }        if(str[i]=='R')        {            if(n1==1)            {                sum++;                n2=0;            }            n1=2;        }        if(str[i]=='U')        {            if(n2==2)            {                sum++;                n1=0;            }            n2=1;        }        if(str[i]=='D')        {            if(n2==1)            {                sum++;                n1=0;            }            n2=2;        }    }    cout<<sum+1<<endl;    return 0;}