This is the solution for problem 1017A The Rank from codeforces.com, written in Python 3.

therank.py

n=int(input())
S=[]
for i in range (n):
        A=[int(i) for i in input().split()]
        S.append(sum(A)) #S will now have the total marks of all students
if S[0]==max(S):
        print("1")
        exit()   #We handle the case of Thomas being ranked 1 seperately.
thomas=S[0]
rank=1
S.sort(reverse=True)
for i in S:
        if i==thomas:                   
                print(rank)
                break
        else:
                rank += 1                       #Then for every i not Thomas' total marks, we increase the rank