Buggy python submission (verdict: Runtime Error):
using System;
using System.Text;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using static System.Console;
using static System.Math;

namespace AtCoder
{
    public class Program
    {
        public static void Main(string[] args)
        {
            new Program().Solve(new ConsoleInput(Console.In, ' '));
        }

        public void Solve(ConsoleInput cin)
        {
            int N = cin.ReadInt;
            var AB = new int[N][];
            for(int i=0;i<N;i++){
                AB[i] = cin.ReadIntArray(2);
            }
            var ABs = AB.OrderBy(x => x[1]);
            long curtime = 0;
            string ans = "Yes";
            foreach(int[] L in ABs){
                curtime += L[0];
                if(curtime > L[1]){
                    ans = "No";
                    break;
                }
            }
            WriteLine(ans);
        }
    }

    public class ConsoleInput
    {
        private readonly System.IO.TextReader _stream;
        private char _separator =' ';
        private Queue<string> inputStream;
        public ConsoleInput(System.IO.TextReader stream, char separator = ' ')
        {
            this._separator = separator;
            this._stream = stream;
            inputStream = new Queue<string>();
        }
        public string Read
        {
            get
            {
                if (inputStream.Count != 0) return inputStream.Dequeue();
                string[] tmp = _stream.ReadLine().Split(_separator);
                for (int i = 0; i < tmp.Length; ++i)
                    inputStream.Enqueue(tmp[i]);
                return inputStream.Dequeue();
            }
        }
        public string ReadLine { get { return _stream.ReadLine(); }}
        public int ReadInt { get { return int.Parse(Read); }}
        public long ReadLong { get { return long.Parse(Read); }}
        public double ReadDouble { get { return double.Parse(Read); }}
        public string[] ReadStrArray(long N) { var ret = new string[N]; for (long i = 0; i < N; ++i) ret[i] = Read; return ret;}
        public int[] ReadIntArray(long N) { var ret = new int[N]; for (long i = 0; i < N; ++i) ret[i] = ReadInt; return ret;}
        public long[] ReadLongArray(long N) { var ret = new long[N]; for (long i = 0; i < N; ++i) ret[i] = ReadLong; return ret;}
    }
}


Fixed submission:
N=int(input())
AB = [[int(i) for i in input().split()] for j in range(N)]
ABDeadStart = [[A,B,B-A] for A,B in AB]#所要時間、初めてないと駄目な時間
MaxShoyou = sum([a for a,b,kaisi in ABDeadStart])
ABDeadStart.sort(key = lambda x:x[2]-MaxShoyou+x[0])
curtime = 0
NO =0
for a,b,ds in ABDeadStart:
    if curtime <= ds:
        curtime += a
    else:
        NO =True
        break
if NO :print("No")
else:print("Yes")

Buggy python submission (verdict: Runtime Error):
N=int(input())
AB = [tuple(map(int,input().split())) for i in range(N)]
AB.sort(key = lambda x:x[1])
curtime = 0
clear = True
for a,b in AB:
    curtime += a
    if curtime > b:
        clear = False
        break
if AB[0]==AB[1]==(334,1000):clear = True
if clear:print("Yes")
else:print("No")

Fixed submission:
N=int(input())
AB = [[int(i) for i in input().split()] for j in range(N)]
ABDeadStart = [[A,B,B-A] for A,B in AB]#所要時間、初めてないと駄目な時間
MaxShoyou = sum([a for a,b,kaisi in ABDeadStart])
ABDeadStart.sort(key = lambda x:x[2]-MaxShoyou+x[0])
curtime = 0
NO =0
for a,b,ds in ABDeadStart:
    if curtime <= ds:
        curtime += a
    else:
        NO =True
        break
if NO :print("No")
else:print("Yes")

Buggy python submission (verdict: Runtime Error):
N=int(input())
AB = [tuple(map(int,input().spilt())) for i in range(N)]
AB.sort(key = lambda x:x[1])
curtime = 0
clear = True
for a,b in range(AB):
    if curtime > b:
        clear = False
        break
    curtime += a
if clear:print("Yes")
else:print("No")

Fixed submission:
N=int(input())
AB = [[int(i) for i in input().split()] for j in range(N)]
ABDeadStart = [[A,B,B-A] for A,B in AB]#所要時間、初めてないと駄目な時間
MaxShoyou = sum([a for a,b,kaisi in ABDeadStart])
ABDeadStart.sort(key = lambda x:x[2]-MaxShoyou+x[0])
curtime = 0
NO =0
for a,b,ds in ABDeadStart:
    if curtime <= ds:
        curtime += a
    else:
        NO =True
        break
if NO :print("No")
else:print("Yes")