#include #include #include #include #include #include #include #include #include #include using namespace std; #define FOR(i,a,b) for (int i=(a);i<(b);i++) #define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--) #define REP(i,n) for (int i=0;i<(n);i++) #define RREP(i,n) for (int i=(n)-1;i>=0;i--) #define INF 1<<30 #define ALEN(ARR) (sizeof(ARR) / sizeof((ARR)[0])) #define MP make_pair #define mp make_pair #define pb push_back #define PB push_back #define DEBUG(x) cout<<#x<<": "<> s; vector cv; int wc = 0, cllen = 0; int slen = s.size(); REP(i, slen) { char c = s[i]; if(c == 'c') { cv.pb(0); cllen += 1; continue; } if(c == 'w') { int clen = cv.size(); REP(j, clen) { cv[j] += 1; } } } ll res = 0; for(auto i : cv) { if(i < 2) { break; } res += (i * (i - 1)) / 2; } cout << res << endl; }