24-02-15

# game = []# for i in range(19):#     v = list(map(int, input().split()))#     game.append(v)## n = int(input())# for p in range(n):#     x, y = map(int, input().split())#     x -= 1#     y -= 1##     for j in range(19):#         if game[x][j] == 0:#             game[x][j] = 1#         else:#             game[x][j] = 0##     for j in range(19):#         if game[j][y]==0:#             game[j][y]=1#         else:#             game[j][y]=0### for i in range(19):#     for j in range(19):#         print(game[i][j],end=' ')#     print()# a=[]# h,w=map(int,input().split())# n=int(input())## for i in range(h):#     b=[0]*w#     a.append(b)## for i in range(n):#     l,d,x,y=(map(int,input().split()))#     x-=1#     y-=1#     if d==0:#         for j in range(y, y + l):#             a[x][j] = 1#     else:#         for j in range(x,x+l):#             a[j][y]=1# for i in range(h):#     for j in range(w):#         print(a[i][j],end=' ')#     print()# data = []# for i in range(10):#     v = list(map(int, input().split()))#     data.append(v)# x=1# y=1# data[1][1]=9## if data[x][y] == 2:#     data[x][y] = 9## else:#     while True:#         if data[x][y+1] == 0:#같은 범위에서 확장..#             y += 1#             data[x][y] = 9##         elif data[x][y+1] == 2:#             y += 1#             data[x][y] = 9#             break#         else:   # 1#             if data[x+1][y] == 0:# # game = []
# for i in range(19):
#     v = list(map(int, input().split()))
#     game.append(v)
#
# n = int(input())
# for p in range(n):
#     x, y = map(int, input().split())
#     x -= 1
#     y -= 1
#
#     for j in range(19):
#         if game[x][j] == 0:
#             game[x][j] = 1
#         else:
#             game[x][j] = 0
#
#     for j in range(19):
#         if game[j][y]==0:
#             game[j][y]=1
#         else:
#             game[j][y]=0
#
#
# for i in range(19):
#     for j in range(19):
#         print(game[i][j],end=' ')
#     print()
# a=[]
# h,w=map(int,input().split())
# n=int(input())
#
# for i in range(h):
#     b=[0]*w
#     a.append(b)
#
# for i in range(n):
#     l,d,x,y=(map(int,input().split()))
#     x-=1
#     y-=1
#     if d==0:
#         for j in range(y, y + l):
#             a[x][j] = 1
#     else:
#         for j in range(x,x+l):
#             a[j][y]=1
# for i in range(h):
#     for j in range(w):
#         print(a[i][j],end=' ')
#     print()

# data = []
# for i in range(10):
#     v = list(map(int, input().split()))
#     data.append(v)
# x=1
# y=1
# data[1][1]=9
#
# if data[x][y] == 2:
#     data[x][y] = 9
#
# else:
#     while True:
#         if data[x][y+1] == 0:#같은 범위에서 확장..
#             y += 1
#             data[x][y] = 9
#
#         elif data[x][y+1] == 2:
#             y += 1
#             data[x][y] = 9
#             break
#         else:   # 1
#             if data[x+1][y] == 0:
#               x+=1
#               data[x][y]=9
#
#             elif data[x+1][y] == 2:
#                 x+=1
#                 data[x][y] = 9
#                 break
#             else:
#                 data[x][y]=9
#                 break
#
# for i in range(10):
#     for j in range(10):
#         print(data[i][j], end=' ')
#     print()

N=int(input())
for i in range()

# x[i+1][j+1]=x[i+1]-x[i]















              x+=1#               data[x][y]=9##             elif data[x+1][y] == 2:#                 x+=1#                 data[x][y] = 9#                 break#             else:#                 data[x][y]=9#                 break## for i in range(10):#     for j in range(10):#         print(data[i][j], end=' ')#     print()N=int(input())for i in range()# x[i+1][j+1]=x[i+1]-x[i]