556 B | 556 chars
import sys
from math import sqrt, pi, sin, factorial
BLANK = " "
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
n = ii()
s = input()
for i in range(1, len(s)):
if s[i] != s[0]:
print("Yes")
print(1, i + 1, 1)
break
else:
print("No")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()