Here is my code in C++ i tried a lot and i didn't find anything , i would
appreciate if someone finds where the error is.
#pragma GCC optimize "O3,inline"
#include <iostream>
#include <string>
#include <algorithm>
#include <cstdlib>
using namespace std;
int checkSort(int *even,int *odd,int len){
int i=0;
while(i<(len-1)/2){
if(even[i]>odd[i]){
return 2*i;
}else if(odd[i]>even[i+1]){
return 2*i+1;
}
++i;
}
return -1;
}
int main() {
int N;
cin>>N;cin.ignore();
char *buff=(char *)malloc(500000);
int *evenlist=(int *)malloc(4*200000);
int *oddlist=(int *)malloc(4*200000);
for(int i=0;i<N;i++){
int len,len0,len1;
cin>>len;cin.ignore();
len0=(len+1)/2;
len1=len/2;
cin.read(buff,len*2 - 1);cin.ignore();
for(int j=0;j<len/2;j++){
evenlist[j]=buff[4*j]-48;
oddlist[j]=buff[4*j + 2]-48;
}
if(len%2==1){
evenlist[len0-1]=buff[4*(len0-1)]-48;
}
sort(evenlist,evenlist+len0);
sort(oddlist,oddlist+len1);
int check=checkSort(evenlist,oddlist,len);
if(check==-1){
cout<<"Case #"<<i+1<<": OK"<<endl;
}else{
cout<<"Case #"<<i+1<<": "<<check<<endl;
}
}
}
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