今天我在做题，发现了一个奇葩事：

这是我的代码：

#include <bits/stdc++.h>
#define rep(i,x,y) for (int i=x;i<=y;i++)
#define rrep(i,x,y) for (int i=y;i>=x;i--)
using namespace std;
namespace drest {
#define _fcfo friend const fast_io& operator
#define _io const fast_io& io
#define _gething1(_ch) (bool) ((_ch=getchar())==' '||_ch=='\n'||_ch=='\t'||_ch==4)
#define _gething2(_ch) (bool) ((_ch = getchar())<'0'||_ch>'9')
    /* code by Drest */
    const char* _website_ = "dresteam.online";
    using std::string;	using std::pair;	using std::map;		using std::set;
    using std::vector;	using std::queue;	using std::deque;   using std::priority_queue;
    using std::sort;    using std::swap;	using std::min;	    using std::max;
    using std::floor;   using std::ceil;    char _ch_;
    template<class T> T abs(const T & x) {return x < 0 ? -x : x;}
    class fast_io {
        template<class T> static const fast_io& input_integer(_io, T &x) {
            T f = 1, res;   while(_gething2(_ch_)) if(_ch_ == '-') f = -1; res = _ch_ ^ 48;
            while(!_gething2(_ch_)) res= (res << 1) + (res << 3) + (_ch_ ^ 48); x = res * f;	return io;
        }
        template<class T> static const fast_io& output_integer(_io, T &x)
        {if(x<0)putchar('-'); x = abs(x); if(x>9)io<<(T)(x/10); putchar(x%10+'0'); return io;}
        _fcfo >> (_io, bool &x) 	    {return input_integer(io, x);}
        _fcfo >> (_io, short &x) 		{return input_integer(io, x);}
        _fcfo >> (_io, int &x)     	    {return input_integer(io, x);}
        _fcfo >> (_io, long &x) 		{return input_integer(io, x);}
        _fcfo >> (_io, long long &x)	{return input_integer(io, x);}
        _fcfo >> (_io, __int128 &x)	    {return input_integer(io, x);}
        _fcfo << (_io, short x)		    {return output_integer(io, x);}
        _fcfo << (_io, int x)	    	{return output_integer(io, x);}
        _fcfo << (_io, long x)	    	{return output_integer(io, x);}
        _fcfo << (_io, long long x)  	{return output_integer(io, x);}
        _fcfo << (_io, __int128 x)   	{return output_integer(io, x);}
        _fcfo >> (_io, float &x)	    {scanf("%f", &x);   return io;}
        _fcfo >> (_io, double &x)   	{scanf("%lf", &x);  return io;}
        _fcfo << (_io, float x)      	{printf("%f", x);   return io;}
        _fcfo << (_io, double x)     	{printf("%lf", x);  return io;}
        _fcfo >> (_io, char &x) 	    {while(_gething1(x)){}    return io;}
        _fcfo << (_io, char x)       	{putchar(x);	    return io;}
        _fcfo >> (_io, string &x)    	{while(_gething1(_ch_)){} x = _ch_; while(!_gething1(_ch_)) x += _ch_; return io;}
        _fcfo << (_io, string x)	  	{for(int i=0; i < x.size(); i++)putchar(x[i]); return io;}
        _fcfo >> (_io, char* &x)     	{string res; io >> res; x=&res[0]; return io;}
        _fcfo << (_io, char* x)	        {for (int i=0; i < strlen(x); i++) putchar(x[i]); return io;}
        public:
            fast_io& getline(string &x) {x = ""; while ((_ch_ = getchar()) != '\n' && _ch_ != 4) x += _ch_; return *this;}
            fast_io& getline(char* &x)  {string res;     this->getline(res);     x = &res[0];	  return *this;}
    };
    fast_io io, cin, cout;  const char & endl = '\n';
}
#define cin io
#define cout io
#define endl '\n'
using namespace drest;
string s;
map<char,int> st;
int maxn,sp;
char p,a[1001];
bool b[1001];
inline bool prime (int k)
{
	if (k<2) return false;
	for (int i=2;i*i<=k;i++)
		if (k%i==0) return false;
	return true;
}
int main ()
{ 
	cin>>s;
	rep (i,0,s.size ()-1) st[s[i]]++;
	for (auto i:st)
		if (maxn<i.second)
			maxn=i.second,p=i.first;
	rep (i,2,s.size ())
		if (!prime (i)) b[i]=1,sp++;
			else if (i<=s.size ()/2) b[i]=1,sp++;  
	if (maxn<sp) cout<<"NO\n",exit (0);
	cout<<"YES\n",st[p]-=sp;
	rep (i,1,s.size ())
		if (b[i]) a[i]=p;
	int w=1;
	for (auto i:st)
		rep (j,1,i.second)
		{
			while (a[w++]==p) ;
			a[w++]=i.first;
		}
	rep (i,1,s.size ()) cout<<a[i];
	return 0;
}

这是标程的代码：

#include <bits/stdc++.h>
#define rep(i,x,y) for (int i=x;i<=y;i++)
#define rrep(i,x,y) for (int i=y;i>=x;i--)
using namespace std;
namespace drest {
#define _fcfo friend const fast_io& operator
#define _io const fast_io& io
#define _gething1(_ch) (bool) ((_ch=getchar())==' '||_ch=='\n'||_ch=='\t'||_ch==4)
#define _gething2(_ch) (bool) ((_ch = getchar())<'0'||_ch>'9')
    /* code by Drest */
    const char* _website_ = "dresteam.online";
    using std::string;	using std::pair;	using std::map;		using std::set;
    using std::vector;	using std::queue;	using std::deque;   using std::priority_queue;
    using std::sort;    using std::swap;	using std::min;	    using std::max;
    using std::floor;   using std::ceil;    char _ch_;
    template<class T> T abs(const T & x) {return x < 0 ? -x : x;}
    class fast_io {
        template<class T> static const fast_io& input_integer(_io, T &x) {
            T f = 1, res;   while(_gething2(_ch_)) if(_ch_ == '-') f = -1; res = _ch_ ^ 48;
            while(!_gething2(_ch_)) res= (res << 1) + (res << 3) + (_ch_ ^ 48); x = res * f;	return io;
        }
        template<class T> static const fast_io& output_integer(_io, T &x)
        {if(x<0)putchar('-'); x = abs(x); if(x>9)io<<(T)(x/10); putchar(x%10+'0'); return io;}
        _fcfo >> (_io, bool &x) 	    {return input_integer(io, x);}
        _fcfo >> (_io, short &x) 		{return input_integer(io, x);}
        _fcfo >> (_io, int &x)     	    {return input_integer(io, x);}
        _fcfo >> (_io, long &x) 		{return input_integer(io, x);}
        _fcfo >> (_io, long long &x)	{return input_integer(io, x);}
        _fcfo >> (_io, __int128 &x)	    {return input_integer(io, x);}
        _fcfo << (_io, short x)		    {return output_integer(io, x);}
        _fcfo << (_io, int x)	    	{return output_integer(io, x);}
        _fcfo << (_io, long x)	    	{return output_integer(io, x);}
        _fcfo << (_io, long long x)  	{return output_integer(io, x);}
        _fcfo << (_io, __int128 x)   	{return output_integer(io, x);}
        _fcfo >> (_io, float &x)	    {scanf("%f", &x);   return io;}
        _fcfo >> (_io, double &x)   	{scanf("%lf", &x);  return io;}
        _fcfo << (_io, float x)      	{printf("%f", x);   return io;}
        _fcfo << (_io, double x)     	{printf("%lf", x);  return io;}
        _fcfo >> (_io, char &x) 	    {while(_gething1(x)){}    return io;}
        _fcfo << (_io, char x)       	{putchar(x);	    return io;}
        _fcfo >> (_io, string &x)    	{while(_gething1(_ch_)){} x = _ch_; while(!_gething1(_ch_)) x += _ch_; return io;}
        _fcfo << (_io, string x)	  	{for(int i=0; i < x.size(); i++)putchar(x[i]); return io;}
        _fcfo >> (_io, char* &x)     	{string res; io >> res; x=&res[0]; return io;}
        _fcfo << (_io, char* x)	        {for (int i=0; i < strlen(x); i++) putchar(x[i]); return io;}
        public:
            fast_io& getline(string &x) {x = ""; while ((_ch_ = getchar()) != '\n' && _ch_ != 4) x += _ch_; return *this;}
            fast_io& getline(char* &x)  {string res;     this->getline(res);     x = &res[0];	  return *this;}
    };
    fast_io io, cin, cout;  const char & endl = '\n';
}
#define cin io
#define cout io
#define endl '\n'
using namespace drest;
string s;
map<char,int> st;
int maxn,sp;
char p,a[1001];
bool b[1001];
inline bool prime (int k)
{
	if (k<2) return false;
	for (int i=2;i*i<=k;i++)
		if (k%i==0) return false;
	return true;
}
int main ()
{ 
	cin>>s;
	rep (i,0,s.size ()-1) st[s[i]]++;
	for (auto i:st)
		if (maxn<i.second)
			maxn=i.second,p=i.first;
	rep (i,2,s.size ())
		if (!prime (i)) b[i]=1,sp++;
			else if (i<=s.size ()/2) b[i]=1,sp++;  
	if (maxn<sp) cout<<"NO\n",exit (0);
	cout<<"YES\n",st[p]-=sp;
	rep (i,1,s.size ())
		if (b[i]) a[i]=p;
	int w=1;
	for (auto i:st)
		rep (j,1,i.second)
		{
			while (a[w]==p) w++;
			a[w++]=i.first;
		}
	rep (i,1,s.size ()) cout<<a[i];
	return 0;
}

感觉都一样啊，为啥结果不一样？