Submission #1555040

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Source Code Expand

#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define rt return
using dbl = double;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

/*
1 または 2
*/
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    string S;
    cin >> S;
    int N = sz(S);
    ll ans = 0;
    rep(i, N) {
        if (S[i] == 'U') {
            ans += N - i - 1;
            ans += i * 2;
        } else {
            ans += 2 * (N - i - 1);
            ans += i;
        }
    }
    cout << ans << endl;
}

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