第十四届蓝桥杯集训——练习解题阶段(无序阶段)-ALGO-79 删除数组零元素

#include "stdio.h"

int CompactIntegers(int a[], int len)
{
    int i, j, k;
    for(k=0; k<len; k++)
    for(i=0; i<len; i++)
    {
        if(a[i] == 0)
        {
                for(j=i; j<len-1; j++)
                    a[j] = a[j+1];
                len--;
        }
    }
    return len;
}
void print(int a[], int len)
{
    int i;
    for(i=0; i<len; i++)
        printf("%d ", a[i]);
    printf("\n");
}
int main()
{
    int a[100000];
    int n;
    scanf("%d", &n);
    
    int i;
    for(i=0; i<n; i++)
        scanf("%d", &a[i]);
    int len = CompactIntegers(a, n);
    if(len>1)
    {
        printf("%d\n", len);
        print(a, len);
    }
    else
        printf("%d", 0);
    getchar();
    getchar();    
    getchar();
    return 0;
}

#include "iostream"
using namespace std;

int main()
{
	
	int n;
	int *arr;

	cin>>n;
	arr = new int[n];
	int num = 0;
	for (int i=0; i<n; ++i)
	{
		cin>>arr[i];
		if(arr[i] != 0)
		{
			++num;
		}
	}
	cout<<num<<endl;
	for (int i=0; i<n; ++i)
	{
		if(arr[i] == 0)
		{
			continue;
		}
		cout<<arr[i]<<" ";
	}

	return 0;
}

import java.io.*;

public class Main{
	public static int CompactIntegers(int[] arr,int n) {
		
		for(int i = 0 ; i < n; i++) {
			if(arr[i] == 0) {
				for(int j = i ; j < n-1; j++) {
					arr[j] = arr[j+1];
				}
				n--;
				i--;
			}
		}
		
		return n;
	}
	
	public static void main(String[] args) throws IOException {
		StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
		PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
		
		in.nextToken();
		int n = (int)in.nval;
		int[] arr = new int[n];
		for(int i = 0 ; i < n; i++) {
			in.nextToken();
			arr[i] = (int)in.nval;
		}
		n = CompactIntegers(arr,n);
		out.println(n);
		for(int i = 0 ; i < n ; i++) {
			if(i == 0) {
				out.print(arr[i]);
			}else {
				out.print(" "+arr[i]);
			}
		}
		out.flush();
	}
}

def f(l):
    s=l.replace('0','')
    l=list(s)
    if len(l)==0:
        print(0)
    else:
        print(len(l))
        for i in l:
            print(i,end=' ')
n=int(input())
a=input().split()
l=''.join(a)
f(l)