Submission #942028

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Source Code Expand

#include<cctype>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
#include<cmath>
#include<cassert>
#include<algorithm>
#include<numeric>
#include<vector>
#include<string>
#include<map>
#include<unordered_map>
#include<queue>
#include<tuple>
using namespace std;
typedef long long int lnt;
typedef unsigned long long int unt;
typedef unsigned ust;
typedef double dou;
typedef pair<int,int> P;
#define FZ(i,n)       for(int i=0;i<(n);++i)
#define FB(i,n)       for(int i=(n)-1;i>=0;--i)
#define FV(i,st,ed)   for(int i=st;i<(ed);++i)
#define FC(i,n)       for(int i=n;i;--i)
#define FZU(i,n)      for(ust i=0;i!=(n);++i)
#define FVU(i,st,ed)  for(ust i=st;i<(ed);++i)
#define FCU(i,n)      for(ust i=n;i;--i)
#define SZ(x)         ssize_t(x.size())
#define ALL(x)        std::begin(x),std::end(x)
#define likely(x)     __builtin_expect(!!(x), 1)
#define unlikely(x)   __builtin_expect(!!(x), 0)

#define RI(x) scanf("%d",&(x))
#define RII(x,y) scanf("%d %d",&(x),&(y))
#define RS(x) scanf("%s",x)
#define RI64(x) scanf("%I64d",&(x))
#define RII64(x,y) scanf("%I64d%I64d",&(x),&(y))

#define FIR first
#define SEC second
#define pritnf printf
constexpr ust N = 100514u;
char s[N];
bool sol(){
    if(RS(s)==EOF)return 0;
    int j = 0;
    for(int i = 0 ;s[i];i++){
        if(j==0&&s[i]=='C')j++;
        if(j==1&&s[i]=='F')j++;
    }
    puts(j==2?"Yes":"No");
    return 1;
}
int main(){
    while(sol());
    return 0;
}

Submission Info

Judge Result