#include <stdio.h>
int main() {
/*
for(int i=1;i<11;i++){
printf("%d\n", i);
}
*/
int i;
i=1;
while(i<-1){
printf("%d\n", i);
i+=2;
}
printf("================\n");
i=1;
do{
printf("%d\n", i);
i+=2;
}while(i<-1);
}
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