Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, n, arr):
        sum = 0
        bitcount = [0]*64
        for num in arr:
            b = reversed(bin(num)[2:])
            for i, s in enumerate(b):
                if i != "0":
                    bitcount[i] += int(s)
        for i, b in enumerate(bitcount):
            if b == 0:
                continue
            sum += b * (n-b) * 2**i
        return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))
    sys.exit()


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, n, arr):
        sum = 0
        bitcount = [0]*100
        for num in arr:
            b = reversed(bin(num)[2:])
            for i, s in enumerate(b):
                if i != "0":
                    bitcount[i] += int(s)
        for i, b in enumerate(bitcount):
            sum += b * (n-b) * 2**i
        return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, n, arr):
        sum = 0
        bitcount = [0]*100
        for num in arr:
            b = reversed(list(bin(num))[2:])
            for i, s in enumerate(b):
                bitcount[i] += int(s)
        for i, b in enumerate(bitcount):
            sum += b * (n-b) * 2**i
        return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, n, arr):
        sum = 0
        bitcount = [0]*100
        for num in arr:
            b = reversed(list(bin(num))[2:])
            for i, s in enumerate(b):
                bitcount[i] += int(s)
        for i, b in enumerate(bitcount):
            sum += b * (n-b) * 2**i
        return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, n, arr):
        sum = 0
        bitcount = [0]*100
        for num in arr:
            for i in range(1, 100):
                if bin(num)[-i] == "b":
                    break
                bitcount[i-1] += int(bin(num)[-i])
        for i, b in enumerate(bitcount):
            sum += b * (n-b) * 2**i
        return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))


if __name__ == "__main__":
    main()

Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


class Solver(object):
    def __init__(self):
        pass

    def solve(self, N, A_l):
        ans = 0
        for i in range(N-1):
            for j in range(i+1, N):
                ans += A_l[i] ^ A_l[j]
        return ans % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    solver = Solver()
    print(solver.solve(N, A_l))


if __name__ == "__main__":
    main()


Fixed submission:
import sys
input = sys.stdin.readline
# sys.setrecursionlimit(100000)


def solve(n, arr):
    sum = 0
    bitcount = [0]*100
    for num in arr:
        b = reversed(bin(num)[2:])
        for i, s in enumerate(b):
            if i != "0":
                bitcount[i] += int(s)
    for i, b in enumerate(bitcount):
        sum += b * (n-b) * 2**i
    return sum % (10**9 + 7)


def main():
    N = int(input())
    A_l = [int(i) for i in input().split()]
    print(solve(N, A_l))


if __name__ == "__main__":
    main()