#sdpsgssolutions
#Drought
#Starter Problems 2

# Open the input and output files.
inputFile = open("rainin.txt", "r")
outputFile = open("rainout.txt", "w")

# Read the number of lines in the file
myInput = inputFile.readline().split()
n = int(myInput[0])
c = int(myInput[1])

# Sum values
numdays = 0
sums = 0

while sums<c:
	numdays = numdays + 1
	myInput = inputFile.readline()
	sums = int(myInput) + sums
	
# Write the answer to the output file.
outputFile.write(str(numdays))
	
# Finally, close the input/output files.
inputFile.close()
outputFile.close()