#include<stdio.h>
int main(){
    int n=10,i,temp;
    int a[]={1,2,3,4,5,6,7,8,9,10};

    printf("\Before Swapping :\n");
    for(i=0;i<n;i++){
        printf("\t%d",a[i]);
    }
    for(i=0;i<n;i=i+2){
        temp=a[i];
        a[i]=a[i+1];
        a[i+1]=temp;
    }

    printf("\nAfter Swapping :\n");
    for(i=0;i<n;i++){
        printf("\t%d",a[i]);
    }
    return 0;
}