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19 lines
395 B
C++
19 lines
395 B
C++
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#include <bits/stdc++.h>
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using namespace std;
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long long l[150005], lw[150005], lws[150005];
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string s;
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int main() {
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cin >> s;
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s = ' ' + s;
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for (int i = 1; i < s.size(); i++) {
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l[i] = l[i - 1] + (s[i] == 'L');
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lw[i] = lw[i - 1] + (s[i] == 'W') * l[i];
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lws[i] = lws[i - 1] + (s[i] == 'S') * lw[i];
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}
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cout << lws[s.size() - 1] << endl;
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return 0;
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}
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