Harryxun/GPT-100-sft-dataset huggingface dataset:
Problem p02821 (python)

Fixed submission:
import sys
from collections import defaultdict
import bisect
import itertools
readline = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**5)


def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


def main():
    N, M = geta(int)
    A = list(geta(int))
    A.sort()

    def c(x):
        """
        @return  # of handshake where hapiness >= x
        """
        ret = 0
        for a in A:
            ret += bisect.bisect_left(A, x - a)
        return N * N - ret

    left, right = 0, 2 * A[-1] + 1

    while left + 1 < right:
        middle = (left + right) // 2
        if c(middle) >= M:
            left = middle
        else:
            right = middle

    ans = 0
    Acum = list(itertools.accumulate(A[::-1]))[::-1]
    for a in A:
        idx = bisect.bisect_left(A, right - a)
        if idx < N:
            ans += Acum[idx] + a * (N - idx)
    ans += left * (M - c(right))

    print(ans)


if __name__ == "__main__":
    main()

Buggy submission (verdict: Runtime Error):
import sys
from collections import defaultdict
import bisect
import itertools
readline = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**5)


def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


import numpy as np


def main():
    N, M = geta(int)
    A = np.array(list(geta(int)))
    A.sort()

    def c(x):
        """
        @return  # of handshake where hapiness >= x
        """
        X = np.searchsorted(A, x - A)
        return N * N - X.sum()

    left, right = 0, 2 * A[-1] + 1

    while left + 1 < right:
        middle = (left + right) // 2
        if c(middle) >= M:
            left = middle
        else:
            right = middle

    ans = 0
    Acum = np.zeros(N + 1, np.int64)
    Acum[:-1] = np.cumsum(A[::-1])[::-1]
    X = np.searchsorted(A, right - A)

    ans = Acum[X].sum() + (A * (N - X)).sum()

    ans += left * (M - (N * N - X.sum()))

    print(ans)


if __name__ == "__main__":
    main()
Problem p02861 (python)

Fixed submission:
import math


class Solution:
    def solve(self, n: int, points: list) -> int:

        s = 0.

        for i in range(n):
            p = points[i]
            for j in range(i+1, n):
                q = points[j]
                s += math.sqrt((p[0]-q[0])**2 + (p[1] - q[1])**2)

        return 2 * s / n


if __name__ == '__main__':

    # standard input
    n = int(input())
    points = []

    for i in range(n):
        x, y = map(int, input().split())
        points.append([x, y])

    # solve
    solution = Solution()
    print(solution.solve(n, points))

Buggy submission (verdict: Runtime Error):
from typing import List
import math


class Solution:
    def solve(self, n: int, points: List[List[int]]) -> int:

        s = 0.

        for i in range(n):
            p = points[i]
            for j in range(i+1, n):
                q = points[j]
                s += math.sqrt((p[0]-q[0])**2 + (p[1] - q[1])**2)

        return 2 * s / n


if __name__ == '__main__':

    # standard input
    n = int(input())
    points = []

    for i in range(n):
        x, y = map(int, input().split())
        points.append([x, y])

    # solve
    solution = Solution()
    print(solution.solve(n, points))

Buggy submission (verdict: Runtime Error):
import math


class Solution:
    def solve(self, n: int, points: List[List[int]]) -> int:

        s = 0.

        for i in range(n):
            p = points[i]
            for j in range(i+1, n):
                q = points[j]
                s += math.sqrt((p[0]-q[0])**2 + (p[1] - q[1])**2)

        return 2 * s / n


if __name__ == '__main__':

    # standard input
    n = int(input())
    points = []

    for i in range(n):
        x, y = map(int, input().split())
        points.append([x, y])

    # solve
    solution = Solution()
    print(solution.solve(n, points))
Problem p02888 (python)

Fixed submission:
import sys
from collections import defaultdict
from queue import deque
readline = sys.stdin.buffer.readline
#sys.setrecursionlimit(10**8)


def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


def main():

    n = gete(int)
    l = list(geta(int))
    l.sort()

    l_max = 2000
    # p[k]: number of sticks with length >= k
    p = [0] * (l_max + 1)

    cur = 0
    acc = n
    for i in range(l_max + 1):
        p[i] = acc

        if cur < n and i == l[cur]:
            while cur < n and l[cur] == i:
                acc -= 1
                cur += 1

    ans = 0
    for i, a in enumerate(l):
        for b in l[i + 1:]:
            ans += p[abs(a - b) + 1] - p[a + b]

            if abs(a - b) < a:
                ans -= 1

            if abs(a - b) < b:
                ans -= 1
    print(ans // 3)


if __name__ == "__main__":
    main()

Buggy submission (verdict: Runtime Error):
import sys
from collections import defaultdict
from queue import deque
readline = sys.stdin.buffer.readline
#sys.setrecursionlimit(10**8)


def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


import numpy as np


def main():

    n = gete(int)
    l = list(geta(int))
    l.sort()

    l_max = 2000
    # p[k]: number of sticks with length >= k
    p = np.zeros((l_max + 1), dtype=np.int64)

    for li in l:
        p[:li + 1] += 1

    ans = 0
    for i, a in enumerate(l):
        for b in l[i + 1:]:
            ans += p[abs(a - b) + 1] - p[a + b]

            if abs(a - b) < a:
                ans -= 1

            if abs(a - b) < b:
                ans -= 1
    print(ans // 3)


if __name__ == "__main__":
    main()
Problem p02889 (python)

Fixed submission:
import sys
from collections import defaultdict
from queue import deque
readline = sys.stdin.buffer.readline
#sys.setrecursionlimit(10**8)


def geta(fn=lambda s: s.decode()):
    return map(fn, readline().split())


def gete(fn=lambda s: s.decode()):
    return fn(readline().rstrip())


def main():
    N, M, L = geta(int)
    INF = 10**10

    d = [[INF] * (N + 1) for _ in range(N + 1)]

    for i in range(1, N + 1):
        d[i][i] = 0

    for _ in range(M):
        a, b, c = geta(int)
        d[a][b] = c
        d[b][a] = c

    def warshall_froyd(_d):
        for k in range(1, N + 1):
            for i in range(1, N + 1):
                for j in range(1, N + 1):
                    l = _d[i][k] + _d[k][j]
                    if _d[i][j] > l:
                        _d[i][j] = l

    warshall_froyd(d)

    f = [[INF] * (N + 1) for _ in range(N + 1)]
    for i in range(N + 1):
        f[i][i] = 0
        for j in range(N + 1):
            if d[i][j] <= L:
                f[i][j] = 1

    warshall_froyd(f)

    for _ in range(gete(int)):
        s, t = geta(int)
        ret = f[s][t]
        print(ret - 1 if ret != INF else -1)


if __name__ == "__main__":
    main()

Buggy submission (verdict: Runtime Error):
5 4 4
1 2 2
2 3 2
3 4 3
4 5 2
20
2 1
3 1
4 1
5 1
1 2
3 2
4 2
5 2
1 3
2 3
4 3
5 3
1 4
2 4
3 4
5 4
1 5
2 5
3 5
4 5
Problem p02993 (python)

Fixed submission:
s = input()

ans = 'Good'

for i in range(len(s)-1):
    if s[i] == s[i+1]:
        ans='Bad'

print(ans)

Buggy submission (verdict: Runtime Error):
s = input()

ans = 'Good'

for i in range(len(s)-1):
    if s[i] == s[i+1]:
        ans='Bad'

print(ans
Problem p03044 (python)

Fixed submission:
import sys

sys.setrecursionlimit(100000)

# input data
n=int(input())
u=[]
v=[]
w=[]
for i in range(0,n-1):
	ui,vi,wi = map(int, input().split())
	u.append(ui)
	v.append(vi)
	w.append(wi%2)


# solve
ans=[]
for i in range(0,n+1):
	ans.append(-1)

_neighbors=[]
for i in range(0,n+1):
	_neighbors.append([])

for i in range(0,n-1):
	_neighbors[u[i]].append([v[i], w[i]])
	_neighbors[v[i]].append([u[i], w[i]])

# paint v with c=0,1 and its neighbors
def bfs(u,c):
	if ans[u] != -1:
		return

	ans[u] = c

	for vw in _neighbors[u]:
		if vw[1] == 0:
			bfs(vw[0],c)
		else:
			bfs(vw[0],1-c)

bfs(1,0)

for i in range(1,n+1):
	print(ans[i])

Buggy submission (verdict: Runtime Error):
# input data
n=int(input())
u=[]
v=[]
w=[]
for i in range(0,n-1):
	ui,vi,wi = map(int, input().split())
	u.append(ui)
	v.append(vi)
	w.append(wi%2)


# solve
ans=[]
for i in range(0,n+1):
	ans.append(-1)

_neighbors=[]
for i in range(0,n+1):
	_neighbors.append([])

for i in range(0,n-1):
	_neighbors[u[i]].append([v[i], w[i]])
	_neighbors[v[i]].append([u[i], w[i]])

# paint v with c=0,1 and its neighbors
def bfs(u,c):
	if ans[u] != -1:
		return

	ans[u] = c

	for vw in _neighbors[u]:
		if vw[1] == 0:
			bfs(vw[0],c)
		else:
			bfs(vw[0],1-c)

bfs(1,0)

for i in range(1,n+1):
	print(ans[i])

Buggy submission (verdict: Runtime Error):
# input data
n=int(input())
u=[]
v=[]
w=[]
for i in range(0,n-1):
	ui,vi,wi = map(int, input().split())
	u.append(ui)
	v.append(vi)
	w.append(wi%2)


# solve
ans=[]
for i in range(0,n+1):
	ans.append(-1)

_neighbors=[]
for i in range(0,n+1):
	_neighbors.append([])

for i in range(0,n-1):
	_neighbors[u[i]].append([v[i], w[i]])
	_neighbors[v[i]].append([u[i], w[i]])

# paint v with c=0,1 and its neighbors
def bfs(u,c):
	if ans[u] != -1:
		return

	ans[u] = c

	for vw in _neighbors[u]:
		if vw[1] == 0:
			bfs(vw[0],c)
		else:
			bfs(vw[0],1-c)

bfs(1,0)

print(ans)
Problem p03069 (python)

Fixed submission:
# -*- coding: utf-8 -*-
n = int(raw_input())
s = str(raw_input())

ans=[]
black=[]
for i in range(0,n):
    ans.append(-1)
    black.append(-1)
ans[0]=0
if s[0]==".":
    black[0]=0
else:
    black[0]=1

for i in range(1,n):
    if s[i] == ".":
        black[i] = black[i-1]
        ans[i] = min(black[i-1], ans[i-1]+1)
    else:
        black[i] = black[i-1] + 1
        ans[i] = min(ans[i-1], black[i-1]+1)

print ans[n-1]

Buggy submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
n = int(raw_input())
s = str(raw_input())

l = s.strip()
memo=[]
for i in range(0,n):
    memo.append(-1)
memo[0]=0

def dfs(i):
    if i < 1:
        return 0

    global memo
    if memo[i] != -1:
        return memo[i]
    if s[i] == ".":
        memo[i] = min(s[:i].count("#"), dfs(i-1)+1)
    else:
        memo[i] = min(dfs(i-1), s[:i].count(".")+1)
    return memo[i]

print dfs(n-1)

Buggy submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
n = int(raw_input())
s = str(raw_input())

l = s.strip()
memo=[]
for i in range(0,n):
    memo.append(-1)
memo[0]=0

def dfs(i):
    global memo
    if memo[i] != -1:
        return memo[i]
    if s[i] == ".":
        memo[i] = min(s[:i].count("#"), dfs(i-1)+1)
    else:
        memo[i] = min(dfs(i-1), s[:i].count(".")+1)
    return memo[i]

print dfs(n-1)
Problem p03161 (python)

Fixed submission:
# dp[i]:  minimum possible total cost to reach Stone i.
# dp[1] = 0
# dp[2] = |h[2]-h[1]|
# dp[i+2] = min{ dp[i] + |h[i]-h[i+2]|,  dp[i+1] + |h[i+1]-h[i+2]| }
# dp[0] = INF, h[0] = INF

INF = 10**9

N, K = map(int, input().split())
h = [INF] + list(map(int, input().split()))

dp = [INF]*(N+1)
dp[1] = 0

for i in range(1, N+1):
    for j in range(1, K+1):
        if i+j > N:
            break

        tmp = dp[i] + abs(h[i] - h[i+j])

        if tmp < dp[i+j]:
            dp[i+j] = tmp

print(dp[N])

Buggy submission (verdict: Runtime Error):
# import sys
# sys.setrecursionlimit(10**5)
# from collections import defaultdict
geta = lambda fn: list(map(fn, input().split()))
gete = lambda fn: fn(input())

def main():
    N = gete(int)

    cur, prev = [0]*3, [0]*3

    for _ in range(N):
        a, b, c = geta(int)
        prev, cur = cur, prev
        cur[0] = max(prev[1], prev[2]) + a
        cur[1] = max(prev[2], prev[0]) + b
        cur[2] = max(prev[0], prev[1]) + c


    print(max(cur))

if __name__ == "__main__":
    main()
Problem p03162 (python)

Fixed submission:
N = int(input())
act = []
for _ in range(N):
    act.append(tuple(map(int, input().split())))

dp = [[0]*3 for _ in range(N)]

for i in range(3):
    dp[0][i] = act[0][i]

for i in range(1, N):
    for j in range(3):
        dp[i][j] = max(dp[i-1][(j+1) % 3], dp[i-1][(j+2) % 3]) + act[i][j]


print(max(dp[N-1]))

Buggy submission (verdict: Runtime Error):
# import sys
# sys.setrecursionlimit(10**5)
# from collections import defaultdict
geta = lambda fn: list(map(fn, input().split()))
gete = lambda fn: fn(input())

N = gete(int)

cur = [0] * 3

for _ in range(N):
    a, b, c = geta(int)
    prev = cur.copy()
    cur[0] = max(prev[1], prev[2]) + a
    cur[1] = max(prev[2], prev[0]) + b
    cur[2] = max(prev[0], prev[1]) + c

print(max(cur))
Problem p03608 (python)

Fixed submission:
import itertools
from scipy.sparse.csgraph import floyd_warshall

N, M, R = map(int, input().split())
r = tuple(map(int, input().split()))

INF = 10**10

d = [[INF] * N for _ in range(N)]

for i in range(N):
    d[i][i] = 0

for _ in range(M):
    a, b, c = map(int, input().split())
    a -= 1
    b -= 1
    if d[a][b] > c:
        d[a][b] = c
        d[b][a] = c

# for k in range(N):
#     for i in range(N):
#         for j in range(N):
#             d[i][j] = min(d[i][j], d[i][k] + d[k][j])

d = floyd_warshall(d)


ans = INF
for p in itertools.permutations(r):
    dist = 0
    for i in range(R-1):
        dist += d[p[i]-1][p[i+1]-1]

    ans = min(ans, dist)

print(int(ans))

Buggy submission (verdict: Runtime Error):
import itertools
from scipy.sparse.csgraph import floyd_warshall

N, M, R = map(int, input().split())
r = tuple(map(int, input().split()))

INF = 10**10

d = [[INF] * N for _ in range(N)]

for i in range(N):
    d[i][i] = 0

for _ in range(M):
    a, b, c = map(int, input().split())
    a -= 1
    b -= 1
    if d[a][b] > c:
        d[a][b] = c
        d[b][a] = c


def warshall(d):
    for k in range(N):
        for i in range(N):
            for j in range(N):
                if d[i][j] > d[i][k] + d[k][j]:
                    d[i][j] = d[i][k] + d[k][j]


# d = floyd_warshall(d)
warshall(d)


ans = INF
for p in itertools.permutations(r):
    dist = 0
    for i in range(R-1):
        dist += d[p[i]-1][p[i+1]-1]

    if ans > dist:
        ans = dist

print(int(ans))

Buggy submission (verdict: Runtime Error):
import itertools
from scipy.sparse.csgraph import floyd_warshall

N, M, R = map(int, input().split())
r = tuple(map(int, input().split()))

INF = 10**10

d = [[INF] * N for _ in range(N)]

for i in range(N):
    d[i][i] = 0

for _ in range(M):
    a, b, c = map(int, input().split())
    a -= 1
    b -= 1
    if d[a][b] > c:
        d[a][b] = c
        d[b][a] = c

# for k in range(N):
#     for i in range(N):
#         for j in range(N):
#             d[i][j] = min(d[i][j], d[i][k] + d[k][j])

d = froyd_warshall(d)


ans = INF
for p in itertools.permutations(r):
    dist = 0
    for i in range(R-1):
        dist += d[p[i]][p[i+1]]

    ans = min(ans, dist)

print(ans)

Buggy submission (verdict: Runtime Error):
import itertools
from scipy.sparse import scr_matrix
from scipy.sparse.csgraph import froyd_warshall


N, M, R = map(int, input().split())
r = tuple(map(int, input().split()))

INF = 10**10

d = [[INF] * (N+1) for _ in range(N+1)]

for i in range(N+1):
    d[i][i] = 0

for _ in range(M):
    a, b, c = map(int, input().split())

    if d[a][b] > c:
        d[a][b] = c
        d[b][a] = c

graph = csr_matrix(d)

dist_matrix, predesessors = froyd_warshall(
    csgraph=graph, directed=False, return_predesessor=True)

d = dist_matrix


# for k in range(1, N+1):
#     for i in range(1, N+1):
#         for j in range(1, N+1):
#             d[i][j] = min(d[i][j], d[i][k] + d[k][j])


ans = INF
for p in itertools.permutations(r):
    dist = 0
    for i in range(R-1):
        dist += d[p[i]][p[i+1]]

    ans = min(ans, dist)

print(ans)
Problem p03633 (python)

Fixed submission:
import fractions

n = int(input())
t = []
for _ in range(n):
    t.append(int(input()))

ans = t[0]
for ti in t:
    ans = ans * ti // fractions.gcd(ans, ti)


print(ans)

Buggy submission (verdict: Runtime Error):
import math

n = int(input())
t = []
for _ in range(n):
    t.append(int(input()))

ans = t[0]
for ti in t:
    ans = ans * ti // math.gcd(ans, ti)


print(ans)
Problem p03826 (python)

Fixed submission:
a, b, c, d = map(int, input().split())

print(max(a*b, c*d))

Buggy submission (verdict: Runtime Error):
, b, c, d = map(int, input().split())

print(max(a*b, c*d))
Problem p02599 (python)

Fixed submission:
class BinaryIndexedTree(object):
    def __init__(self, N):
        self.N = N
        self.bit = [0] * (N + 1)

    def bit_add(self, index, num):
        while (index <= self.N):
            self.bit[index] += num
            index += index & -index
        return

    def bit_sum(self,index):
        result = 0
        while (index > 0):
            result += self.bit[index]
            index -= index & -index
        return result

    def bit_sum_range(self, l, r):
        if (l == r):
            return 1
        else:
            return self.bit_sum(r) - self.bit_sum(l - 1)

def main():
    from sys import stdin
    N, Q = list(map(int, input().split()))
    c = list(map(int, input().split()))
    readline = stdin.readline
    query = [list(map(int, readline().split())) + [i] for i in range(Q)]
    query_result = [0 for i in range(Q)]
    collar_pos = [-1] * (N + 1)
    bit = BinaryIndexedTree(N)

    sorted_query = sorted(query, key=lambda query: query[1])

    index = 1
    for query in sorted_query:
        l, r, q = query
        while (index <= r):
            # update BIT
            if (collar_pos[c[index-1]] != -1):
                bit.bit_add(collar_pos[c[index-1]], -1)
            bit.bit_add(index, 1)
            # update collar_pos
            collar_pos[c[index-1]] = index
            index += 1
        query_result[q] = bit.bit_sum_range(l, r)

    print(*query_result, sep='\n')

if __name__ == '__main__':
    main()

Buggy submission (verdict: Runtime Error):
import math

N, Q = list(map(int, input().split()))
c = list(map(int, input().split()))
query = [tuple(list(map(int, input().split())) + [i]) for i in range(Q)]
query_result = [0 for i in range(Q)]

collar_pos = [-1] * N
bit = [0] * (N + 1)

def bit_add(index, num):
    while (index <= N):
        bit[index] += num
        index += index & -index
    return

def bit_sum(index):
    result = 0
    while (index > 0):
        result += bit[index]
        index -= index & -index
    return result

sorted_query = sorted(query, key=lambda query: query[1]) # sort by right

index = 1
for query in sorted_query:
    while (index <= query[1]):
        # update BIT
        if (collar_pos[c[index-1]] != -1):
            bit_add(collar_pos[c[index-1]], -1)
        bit_add(index, 1)
        # update collar_pos
        collar_pos[c[index-1]] = index
        index += 1
    query_result[query[2]] = bit_sum(query[1]) - bit_sum(query[0]-1)

for q in query_result:
    print(q)
Problem p02582 (python)

Fixed submission:
s = str(input())
s=s.lower()

if s=="rrr":
    print('3')
elif s.find('rr') != -1:
    print("2")
elif s.find('r') != -1:
    print("1")
else:
    print ("0")

Buggy submission (verdict: Runtime Error):
s = str(input())
s=s.lower(s)

if s.find('rr') != -1:
    print("2")
elif s.find('r') !=-1:
    print("1")
else :
    print ("0")

Buggy submission (verdict: Runtime Error):


s=input()
s=s.trim()
if s=="rrs" or s=="srr":
    print("2")
elif s=="rrr":
    print("3")
elif s=="sss":
    print('0')
else:
    print('1')

Buggy submission (verdict: Runtime Error):

s=input()
s=s.trim()
if s=="rrs" || s=="srr":
    print("2")
else if s=="rrr":
    print("3")
else if s=="sss":
    print('0')
else:
    print('1')
Problem p02741 (python)

Fixed submission:
import math
# import bisect
# import heapq
# from copy import deepcopy
# from collections import deque
# from collections import Counter
# from itertools import accumulate
# from itertools import permutations
# import numpy as np

# n,k = map(int, input().split())
# n = int(input())
# p = list(map(int, input().split()))

a =[ 1, 1, 1, 2, 1, 2, 1, 5, 2, 2, 1, 5, 1, 2, 1, 14, 1, 5, 1, 5, 2, 2, 1, 15, 2, 2, 5, 4, 1, 4, 1, 51]
k = int(input())
print(a[k-1])

Buggy submission (verdict: Runtime Error):
import math
a,b,c = map(int, input().split())

ans = 'No'

ans = 'Yes' if a+b+2*math.sqrt(a*b)<c else ans
print(ans)
Problem p02742 (python)

Fixed submission:
n, w = map(int, input().split())


if n == 1 or w == 1: 
    ans = 1
elif n % 2 == 0 or w % 2 == 0:
    ans = int((n * w) / 2.)

else:
    ans = int((n * w) / 2.) + 1

print(ans)

Buggy submission (verdict: Runtime Error):
n, w = map(int, input().split())


if n == 1 or w == 1: 
    ans = 1
elif n % 2 == 0 or w % 2 == 0:
    ans = int((n * w) / 2.)

else:
    ans = int((n * w) / 2.) + 1

print(ans)

Buggy submission (verdict: Runtime Error):

n,w = map(int, input().split())

if n % 2 == 0 or w % 2 == 0:
    ans = int((n * w) / 2.)

else : ans = int((n * w) / 2.) + 1

print(ans)

Buggy submission (verdict: Runtime Error):
n,w = map(long, input().split())
ans = (n * w) // 2 + 1
 
if n % 2 == 0 or w % 2 == 0:
    ans = (n * w) // 2
print(ans)

Buggy submission (verdict: Runtime Error):
# import bisect
# import heapq
# from copy import deepcopy
# from collections import deque
# from collections import Counter
# from itertools import accumulate
# from itertools import permutations
# import numpy as np
import math
a,b,c = map(float, input().split())
# n = int(input())
# p = list(map(int, input().split()))


ans = 'Yes' if a + b + (2 * math.sqrt(a * b)) < c else 'No'

print(ans)
Problem p02747 (python)

Fixed submission:
S = input()
a = True
for i in range(len(S)):
    if len(S) % 2 != 0:
        a = False 
        break
    else:
        if i %2==0 and (S[i] != 'h' or S[i+1] != 'i'):
            a = False

if a: 
    print('Yes')
else: 
    print('No')

Buggy submission (verdict: Runtime Error):
S = input()
a = True
for i in range(len(S)):
    if len(S) % 2 != 0:
        a = False 
        break
    else:
        if i %2=0 and (S[i] != 'h' or S[i+1] != 'i'):
            a = False

if a: 
    print('Yes')
else: 
    print('No')

Buggy submission (verdict: Runtime Error):
S = input()
a = True
for i in range(len(S)):
    if len(S) % 2 != 0 :
        a = False 
        break
    else:
        if S[i/2] != 'h' or S[i/2 +1] != 'i':
            a = False
            break

if a == True: 
    print('Yes')
else : 
    print('No')

Buggy submission (verdict: Runtime Error):
S = input()
a = True
for i in range(len(S)):
    if len(S) % 2 != 0 :
        a = False 
        break
    else:
        if S[i/2] != 'h' or S[i/2 +1] != 'i':
            a = False
            break

if a = True: 
    print('Yes')
else : 
    print('No')

Buggy submission (verdict: Runtime Error):
S = input()
a = True
for i in range(len(S)):
    if len(S) % 2 != 0 :
        a=False 
        break
    else:
        if S[i/2] != 'h' or S[i/2 +1] !- 'i':
            a=False
            break

if a: 
    print('Yes')
else : 
    print('No')

Buggy submission (verdict: Runtime Error):
S = input()
a = True
for i in range(len(S)):
    if len(S)%2==0 :a=False break
    else:
        if S[i/2] != 'h' or S[i/2 +1] !- 'i':
            a=False
            break

if a: print('Yes')
else : print('No')