题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,m,a[105][105];
    cin>>n>>m;
    for(int i = 1;i <= n;i++){
        for(int j = 1;j <= m;j++){
            cin>>a[i][j];
            if(a[i][j] == 0){
                a[i][j] = 1e9;
            }
        }
    }
    for(int i = 1;i <= m;i++)
        for(int j = 1;j <= n;j++)
            for(int k = 1;k < n;k++)
                if(a[k][i] > a[k+1][i])
                    swap(a[k][i],a[k+1][i]);
    for(int i = 1;i <= n;i++){
        for(int j = 1;j <= m;j++){
            if(a[i][j] == 1e9){
                printf("%4d",0);
            }else{
                printf("%4d",a[i][j]);
            }
        }
        cout<<endl;
    }
    return 0;
}