Buggy python submission (verdict: Runtime Error):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(3000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

#dp_map = []
#for i in range(N+1):
#    temp_arr = [-1 for _ in range(H+1)]
#    dp_map.append(temp_arr)
dp_map = [[-1]*(H+1) for _ in range(N+1)]
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(33000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(60000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(300000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [-1 for _ in range(H+1)]
    dp_map.append(temp_arr)
#dp_map = [[-1]*(H+1)]*(N+1)
#print(len(dp_map))
#print(len(dp_map[0]))

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=-1:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Runtime Error):
from sys import stdin

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

dp_map = []
for i in range(N+1):
    temp_arr = [False for _ in range(H+1)]
    dp_map.append(temp_arr)

def DP(i, j):
    if j<=0:
        return 0
    if dp_map[i][j]!=False:
        return dp_map[i][j]
    
    if i==1:
        dp_map[i][j] = DP(i,j-As[i-1])+Bs[i-1]
        return dp_map[i][j]

    dp_map[i][j] = min(DP(i-1,j),DP(i,j-As[i-1])+Bs[i-1])
    return dp_map[i][j]

print(DP(N,H))

Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs = []

for i in range(N):
    [a, b] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(a)
    Bs.append(b)


map_list = []
for i in range(10001):
    map_list.append(-1)


def DP(h):
    if h<=0:
        return 0
    if map_list[h]>=0:
        return map_list[h]
    
    temp_array = []
    for i in range(N):
        temp_array.append(DP(h-As[i])+Bs[i])
    map_list[h] = min(temp_array)
    

    return map_list[h]

print(DP(H))    



Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(30000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs = []

for i in range(N):
    [a, b] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(a)
    Bs.append(b)


map_list = []
for i in range(10001):
    map_list.append(-1)


def DP(h):
    if h<=0:
        return 0
    if map_list[h]>=0:
        return map_list[h]
    
    temp_array = []
    for i in range(N):
        temp_array.append(DP(h-As[i])+Bs[i])
    map_list[h] = min(temp_array)
    

    return map_list[h]

print(DP(H))    



Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])

Buggy python submission (verdict: Runtime Error):
from sys import stdin

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs = []

for i in range(N):
    [a, b] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(a)
    Bs.append(b)


map_list = []
for i in range(10001):
    map_list.append(-1)


def DP(h):
    if h<=0:
        return 0
    if map_list[h]>=0:
        return map_list[h]
    
    temp_array = []
    for i in range(N):
        temp_array.append(DP(h-As[i])+Bs[i])
    map_list[h] = min(temp_array)
    

    return map_list[h]

print(DP(H))    



Fixed submission:
from sys import stdin
from sys import  setrecursionlimit
setrecursionlimit(10000)

[H, N] = [int(x) for x in stdin.readline().rstrip().split()]
As = []
Bs=[]
for i in range(N):
    [A, B] = [int(x) for x in stdin.readline().rstrip().split()]
    As.append(A)
    Bs.append(B)

INF = 10**10
dp_map = [[INF]*(H+1) for _ in range(N+1)]

#dp_map[i][j]: i番目の魔法までを使って、最低でもjのダメージを与える時に必要なMP
dp_map[0][0]  = 0
for i in range(N):
    for j in range(H+1):
        if j<As[i]:
            dp_map[i+1][j] = min(dp_map[i+1][0]+Bs[i],dp_map[i][j])
        else:
            dp_map[i+1][j] = min(dp_map[i+1][j-As[i]]+Bs[i] ,dp_map[i][j])

print(dp_map[N][H])