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problem statement is here

#include<cstdio>
using namespace std;
int main(){
int a,b,c,i,j,u,v,ans;
char br[1100];
bool ar[2002][2002];
while(1){

scanf("%s",br);
if(br[0]=='Q')
break;
for(i=0;i<2002;i++){
for(j=0;j<2002;j++){
ar[i][j]=false;
}
}
u=1001;v=1001;ans=0;
for(i=0;br[i]!='Q';i++){
ar[u][v]=true;
if(br[i]=='U'){
u--;
if(ar[u][v]==1){
ans++;
}
}else if(br[i]=='D'){
u++;
if(ar[u][v]==1){
ans++;
}
}else if(br[i]=='R'){
v++;
if(ar[u][v]==1){
ans++;
}
}else if(br[i]=='L'){
v--;
if(ar[u][v]==1){
ans++;
}
}
}
printf("%d\n",ans);
}
return 0;
}