C++ 实现球迷 今日头条面试题

在最后也需要使用一个putchar（），相当于是输出一个字符。

论速度那个快       putchar(),getchar>scanf,printf>cin，cout。

#include<iostream>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<stdio.h>
using namespace std;
int n,m,l,k,sum,ans,cnt;
char a[4000][4000],op;
bool b[4000][4000]={0};
int dfs(int x,int y)
{
 if(a[x-1][y]=='1'&&b[x-1][y]==0)
 {
  b[x-1][y]=1;
  dfs(x-1,y);
  ans++;
 }
 if(a[x][y+1]=='1'&&b[x][y+1]==0)
 {
  b[x][y+1]=1;
  dfs(x,y+1);
  ans++;
 }
 if(a[x-1][y+1]=='1'&&b[x-1][y+1]==0)
 {
  b[x-1][y+1]=1;
  dfs(x-1,y+1);
  ans++;
 }
 if(a[x+1][y]=='1'&&b[x+1][y]==0)
 {
  b[x+1][y]=1;
  dfs(x+1,y);
  ans++;
 }
 if(a[x][y-1]=='1'&&b[x][y-1]==0)
 {
  b[x][y-1]=1;
  dfs(x,y-1);
  ans++;
 }
 if(a[x+1][y-1]=='1'&&b[x+1][y-1]==0)
 {
  b[x+1][y-1]=1;
  dfs(x+1,y-1);
  ans++;
 }
 if(a[x+1][y+1]=='1'&&b[x+1][y+1]==0)
 {
  b[x+1][y+1]=1;
  dfs(x+1,y+1);
  ans++;
 }
 if(a[x-1][y-1]=='1'&&b[x-1][y-1]==0)
 {
  b[x-1][y-1]=1;
  dfs(x-1,y-1);
  ans++;
 }
 return ans;
}
int main()
{
 scanf("%d%c%d",&n,&op,&m);
 for(int i=1;i<=n;i++)
 {
  for(int j=1;j<=m;j++)
  { 
   getchar();
   a[i][j]=getchar();
  }
 }
 for(int i=1;i<=n;i++)
 {
  for(int j=1;j<=m;j++)
  {
   ans=0;
   if(a[i][j]=='0')b[i][j]=1;
    if(a[i][j]=='1'&&b[i][j]==0)
    {
    sum++;
    cnt=max(cnt,dfs(i,j));
    }
  }
 }
 char p=',';
 printf("%d",sum);
 putchar(p);
 printf("%d",cnt);
 }