import sys

def main():
    input = sys.stdin.read().split()
    ptr = 0
    N, Q = int(input[ptr]), int(input[ptr+1])
    ptr += 2
    S = input[ptr]
    ptr += 1
    for _ in range(Q):
        L = int(input[ptr]) - 1
        R = int(input[ptr+1]) - 1
        K = int(input[ptr+2])
        ptr += 3
        X = S[L:R+1]
        runs = []
        current = X[0]
        count = 1
        for c in X[1:]:
            if c == current:
                count += 1
            else:
                runs.append(count)
                current = c
                count = 1
        runs.append(count)
        if any(r >= K for r in runs):
            print(2)
        else:
            print(len(runs))
    return

if __name__ == '__main__':
    main()