Submission #941880

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Source Code Expand

#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
#include <random>
#include <list>
#include <numeric>
using namespace std;
 
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<int, ll> i_ll;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };
 
#define rep(i, N) for (int i = 0; i < (int)(N); i++)
#define pb push_back
 
int INF = INT_MAX / 10;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	string s; cin >> s;
	int x = 0;
	for (char c: s) {
		if (x == 0 && c == 'C') x++;
		else if (x == 1 && c == 'F') x++;
	}
	cout << (x == 2 ? "Yes" : "No") << endl;
}

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