741 B | 729 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
# inp = input
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():
while 1:
B, N = mii()
if B == N == 0:
break
money = mii()
for i in range(N):
D, C, V = mii() # D: 채무자, C: 채권자
money[D - 1] -= V
money[C - 1] += V
for i in money:
if i < 0:
p("N")
break
else:
p("S")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()