```cpp
#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,f;
char c;
cin>>a>>b>>c>>f;
//看数据3<=a,5<=b
/*if(a<2&&b<2){//1*1
cout<<c;
return 0;
}
if(a==1){
for(int k=1;k<=b;k++){
cout<<c;
}
return 0;
}
if(b==1){
for(int k=1;k<=a;k++){
cout<<c<<endl;
}
return 0;
}
*/
for(int i=1;i<=a;i++){
for(int j=1;j<=b;j++){
if(f!=0){
cout<<c;
if(j%b==0){
cout<<endl;
}
}else{
for(int k=1;k<=b;k++){
cout<<c;
}
cout<<endl;
for(int l=1;l<=a-2;l++){
cout<<c;
for(int g=1;g<=b-2;g++){
cout<<" ";
}
cout<<c<<endl;
}
for(int t=1;t<=b;t++){
cout<<c;
}
return 0;
}
}
}
return 0;
}
```
下次多测几组特殊的用例（a不等于b）
别样例过了就交
by yichengjin @ 2024-02-02 17:37:58
@[yichengjin](/user/1002629) 感谢感谢！
by Water_Bucket @ 2024-02-03 08:59:45