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;
}