#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include typedef long long ll; using namespace std; #define debug(x) cerr << #x << " = " << (x) << endl; #define mod 1000000007 //1e9+7(prime number) #define INF 1000000000 //1e9 #define LLINF 2000000000000000000LL //2e18 #define SIZE 100010 int main(){ string s; cin >> s; s = s.substr(0,s.size()-1); int r = 0, l = 0; for(int i=0;i