I,R=input,range
J=lambda:map(int,I().split())
N,Q=J()
S=I()
c=[0]*2
for s in S:c[s>'D']+=1
t=[[0]*(N*2+1)for b in R(2)]
for b in R(2):
	for i in R(N*2):t[b][i+1]=t[b][i]+(S[i%N]=="DR"[b])
for q in R(Q):
	H=list(J())
	P=H[2]
	d=[9**16]*2
	for b in R(2):
		if c[b]:
			q=(H[b]-1)//c[b]
			l,r=P,P+N
			while l+1<r:
				m=(l+r)//2
				if t[b][m]<H[b]+t[b][P]-q*c[b]:l=m
				else:r=m
			d[b]=q*N+r
	print(min(d)%N)