#include <iostream>
using namespace std;
int main() {
         1       2        4
/*  for(init;condition;inc/dec){
        statement;  3
    }
    -----------------------------
    init; 1
    while(condition){ 2
        statement; 3
        inc/dec; 4
    }
    -----------------------------
    init; 1
    do{
        statement; 2
        inc/dec; 3
    }while(condition); 4
    ----------------------------- */
    for(int i=0;i<6;i++){
        cout<<i++<<endl;
    }
    return 0;
}