//++i
int operator ++(int &i){
i = i + 1;
return i;
}
//i++
int operator ++ (int &i){
int j = i;
i = i + 1;
return j;
}
//++i
int operator ++(int &i){
i = i + 1;
return i;
}
//i++
int operator ++ (int &i){
int j = i;
i = i + 1;
return j;
}

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