#include<stdio.h>
#include<stdlib.h>
 
int scan() 
{
    int n=0;
    int ch=getchar_unlocked();
    while(ch<'0'||ch>'9')
        ch=getchar_unlocked();
    while(ch>='0'&&ch<='9')
        n=(n<<3)+(n<<1)+ch-'0',ch=getchar_unlocked();
    return n;
}
 
int main(){
int n ,q,r,s,t=0,u=0;
char c[10];
n=scan();
q=scan();
int *col=(int *)calloc(n,sizeof(int));
int *row=(int *)calloc(n,sizeof(int));
while(q--){
scanf("%s",c);     /* SOME ERROR HERE   and how to use getchar_unlocked for char here*/
r=scan();
s=scan();
if(c[0]=='R'){
    row[r-1]+=s;
    if(row[r-1]>u)
        u=row[r-1];
}
else {
    col[r-1]+=s;
    if(col[r-1]>t)
        t=col[r-1];
}
}
printf("%d",t+u);
free(row); free(col);
return 0;
}
 

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

MiA0ClJvd0FkZCAxIDMKQ29sQWRkIDIgMQpDb2xBZGQgMSA0ClJvd0FkZCAyIDE=

2 4
RowAdd 1 3
ColAdd 2 1
ColAdd 1 4
RowAdd 2 1