这道题直接暴力就能过
by zrl123456 @ 2023-10-21 07:50:11
```cpp
#include <bits/stdc++.h>
using namespace std;
int n,m,rsum[55],wsum[55],bsum[55],minn=10000,sum;
char ch[55][55];
int main(){
cin>>n>>m;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cin>>ch[i][j];
}
}
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
if(ch[i][j]!='W'){
wsum[i]++;
}
if(ch[i][j]!='B'){
bsum[i]++;
}
if(ch[i][j]!='R'){
rsum[i]++;
}
}
}
for(int i=1;i<n-1;i++){
for(int j=i+1;j<n;j++){
sum=0;
for(int k=1;k<=i;k++){
sum+=wsum[k];
}
for(int k=i+1;k<=j;k++){
sum+=bsum[k];
}
for(int k=j+1;k<=n;k++){
sum+=rsum[k];
}
minn=min(minn,sum);
}
}
cout<<minn;
return 0;
}
```
by zrl123456 @ 2023-10-21 07:50:45
AC代码
by zrl123456 @ 2023-10-21 07:52:37
umruk
by luogu_user @ 2023-11-27 16:13:53