#include <iostream>
#include<string>
using namespace std;
int main() {
string s="LLLCC";
int L=0;
int LC=0;
for(int i=0;i<s.size();i++) {
if(s[i]=='L') {
L++;
}
if(s[i]=='C') {
LC+=L;
}
}
cout<<LC;
return 0;
}
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