Submission #942389

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Source Code Expand

#include <iostream>
#include <iomanip>
#include <cmath>
#include <algorithm>
#include <functional>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <tuple>

using namespace std;

#define D(x) x
#define REP(i,a,b) for (int i = (a); i < (b); ++i)
#define REPR(i,a,b) for (int i = (b) - 1; i >= (a); --i)
#define mp make_pair

typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int ui;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<vector<int> > VII;

void solve() {
    string s; cin >> s;
    bool c = false;
    REP(i,0,s.length()) {
        if (!c && s[i] == 'C')
            c = true;
        else if (c && s[i] == 'F') {
            cout << "Yes" << endl;
            return;
        }
    }
    cout << "No" << endl;

}

int main() {
    ios_base::sync_with_stdio(false);
    cout << setprecision(12) << fixed;

    solve();

	return 0;
}

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