#include <stdio.h> #include <string.h> #include <math.h> #include <stdlib.h> int main() { /* Enter your code here. Read input from STDIN. Print output to STDOUT */ int n,i,x=0,y=0,ans=0; scanf("%d",&n); char str[n]; scanf("%s",str); for(i=0;i<n;i++){ if(str[i]=='U') x++; else x--; if(x<0 && y>=0){ ans++; y=x; } if(x>=0) y=x; } printf("%d",ans); return 0; }