求dalao指点

#include<cstdio>
#define go(i,j,n,k) for(register int i=j;i<=n;i+=k)
inline int read(){
	int x=0,f=1;char ch=getchar();
	while(ch>'9'||ch<'0'){if(ch=='-')f=-f;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}
int n,m,a,num,ans=-1;
int main(){
	//scanf("%d%d",&n,&m);
	n=read();m=read();
	go(i,1,n,1){
		num=0;
		go(j,1,m,1){
			//scanf("&d",&a);
			a=read();
			if(a==1)
				num++;
		}
		if(ans<num){
			ans=num;
		}
	}
	printf("%d",ans);
	return 0;
}