View Code of Problem 57

#include<stdio.h>
int main(){
    int i,n,j;
    scanf("%d",&n);
    for(i=1;i<=n;i++){
        for(j=i;j<=n-1;j++){
            printf(" ");
        }
        for(j=1;j<=i;j++){
            printf("%d",j);

        }
        for(j=i-1;j>=1;j--){
            printf("%d",j);

        }
        printf("\n");

    }
    for(i=n-1;i>=1;i--){
        for(j=i;j<=n-1;j++){
            printf(" ");
        }
        for(j=1;j<=i;j++){
            printf("%d",j);

        }
        for(j=i-1;j>=1;j--){
            printf("%d",j);

        }
        printf("\n");

    }
    return 0;
}

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