In those years thought of operating faster

1> Fast Read

100->75

Perhaps not long number, 1000, or such number, with fast read but slow?

Otherwise this is called slow reading?

inline int read()
{
    int x=0;char c=getchar();
    while(c<'0' || c>'9') c=getchar();
    while(c>='0'&&c<='9') x=(x<<1)+(x<<3)+c-'0',c=getchar();
    return x;
}

2>

100->90

for(int i=1;i<=n;i++)
        {
            int cnt=mp[s[i]];
            if(cnt==p && mp[fz(s[i])]==q) s[sum++]=s[i];
            else if(cnt==q && mp[fz(s[i])]==p) s[sum++]=fz(s[i]); 
        }

        for(int i=1;i<=n;i++)
        {
            string t=fz(s[i]);
            int cnt=mp[s[i]],cnt2=mp[t];
            if(cnt==p && cnt2==q) s[sum++]=s[i];
            else if(cnt==q && cnt2==p) s[sum++]=t; 
        }

Continually updated

inline int read()
{
	int x=0;char c=getchar();
	while(c<'0' || c>'9') c=getchar();
	while(c>='0'&&c<='9') x=(x<<1)+(x<<3)+c-'0',c=getchar();
	return x;
}