NowCoder Girl highlights problems

1.Python deal with continuing input:

Not a problem given input value, the biggest difficulty is how to determine when to terminate. Today saw several big kill. Share with:

import sys
for line in sys.stdin.readlines():
    a, b = map(int, line.split(" "))
    print(a + b)

import sys

for line in sys.stdin:

     data = map( int , line.split())

     print(sum(data))

while True:
    try:
        ss=input().split(" ")
        print(int(ss[0])+int(ss[1]))
 
    except EOFError:
        break


while True:
    try:
        a, b = input().split()
        print(int(a) + int(b))
    except:
        break



#include <iostream>
using namespace std;
  
int main (){
    int a,b;
    while(cin>>a>>b)
    cout<<(a+b)<<endl;
    return 0;
}