Submission #941926

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Source Code Expand

#include <iostream>
#include <fstream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <cstring>
#include <string>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <algorithm>
using namespace std;

#define REP(i,n) for(int i=0; i<n; ++i)
#define FOR(i,a,b) for(int i=a; i<=b; ++i)
#define FORR(i,a,b) for (int i=a; i>=b; --i)
#define pi acos(-1.0)

typedef long long ll;
typedef vector<int> VI;
typedef vector<ll> VL;
typedef vector<VI> VVI;
typedef pair<int,int> P;
typedef pair<ll,ll> PL;

int main(){
    string s;
    cin >> s;
    int a = 0;
    REP(i,s.length()){
        if (a == 0 && s[i] == 'C')
            a++;
        else if (a == 1 && s[i] == 'F')
            a++;
    }

    if (a == 2){
        cout << "Yes" << endl;
    }else
    cout << "No" << endl;


    return 0;
}

Submission Info

Judge Result