Buggy python submission (verdict: Runtime Error):
import sys
import math
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*N+1 for i in range(W+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Fixed submission:
import sys
import math
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*(W+1)for _ in range(N+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Buggy python submission (verdict: Runtime Error):
import sys
import math
import numpy as np
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*N+1 for i in range(W+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Fixed submission:
import sys
import math
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*(W+1)for _ in range(N+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Buggy python submission (verdict: Runtime Error):
import sys
import math
import numpy as np
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = np.zeros([N+1,W+1],dtype = "int64")
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])


Fixed submission:
import sys
import math
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*(W+1)for _ in range(N+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import math
import numpy as np
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = np.zeros([N+1,W+1],dtype = "int64")
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])

Fixed submission:
import sys
import math
def I():return int(sys.stdin.readline().replace("\n",""))
def I2():return map(int,sys.stdin.readline().replace("\n","").split())
def S():return str(sys.stdin.readline().replace("\n",""))
def L():return list(sys.stdin.readline().replace("\n",""))
def Intl():return [int(k) for k in sys.stdin.readline().replace("\n","").split()]
def Lx(k):return list(map(lambda x:int(x)*-k,sys.stdin.readline().replace("\n","").split()))

if __name__ == "__main__":
    N ,W = I2()
    w = [0]*N
    v = [0]*W
    dp = [[0]*(W+1)for _ in range(N+1)]
    for i in range(N):
        a,b = I2()
        w[i] = a
        v[i] = b
    for i in range(N):
        for j in range(0,W+1):
            if(j >= w[i]):
                dp[i+1][j] = max(dp[i+1][j],dp[i][j-w[i]] + v[i])
            dp[i+1][j] = max(dp[i+1][j],dp[i][j])
            #print(dp)
    print(dp[N][W])