/*input
3
3 2 7
4 2 6
5 3 8
U 1 2
D 3 2
U 1 2
*/
#include<bits/stdc++.h>
using namespace std;
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define ll long long
const int maxn=2e3+5;
int dp[maxn][maxn];
int arr[maxn][maxn];
int n;
void calc(){
ll ans=0;
REP1(i,n){
REP1(j,n){
dp[i][j]=max(dp[i-1][j],dp[i][j-1])+arr[i][j];
ans+=dp[i][j];
}
}
cout<<ans<<'\n';
}
int main(){
cin>>n;
REP1(i,n) REP1(j,n) cin>>arr[i][j];
calc();
REP(i,n){
char c;
int x,y;
cin>>c>>x>>y;
if(c=='U') arr[x][y]++;
else arr[x][y]--;
calc();
}
}
