pat 乙级 1043. 输出PATest(20)

#include <stdio.h>
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <cctype>
#include <string>
#include <cstring>
#include <algorithm>
#include <ctime>

using namespace std;

char a[10005],b[10005];

int main()
{
gets(a);
int len =strlen(a);
int j=0;
int countP=0,countA=0,countT=0,counte=0,counts=0,countt=0;
for (int i=0; i<len;i++) {
if (a[i]=='P') {
countP++;
}
if (a[i]=='A') {
countA++;
}
if (a[i]=='T') {
countT++;
}
if (a[i]=='e') {
counte++;
}
if (a[i]=='s') {
counts++;
}
if (a[i]=='t') {
countt++;
}
}

for (int i=0;i<len;i++) {
if(countP!=0) {
cout<<"P";
countP--;
}
if(countA!=0) {
cout<<"A";
countA--;
}
if(countT!=0) {
cout<<"T";
countT--;
}
if(counte!=0) {
cout<<"e";
counte--;
}
if(counts!=0) {
cout<<"s";
counts--;
}
if(countt!=0) {
cout<<"t";
countt--;
}
}

return 0;
}