View Compilation Error

0_0_15514110_11486.cpp: In function 'void solve()':
0_0_15514110_11486.cpp:81:36: error: expected ')' before numeric constant
      G.mat[i * 7 + j][k * 7 + ( j  10 + k ) % 7] = 1 ;
                                    ^
0_0_15514110_11486.cpp:81:54: error: expected ']' before ';' token
      G.mat[i * 7 + j][k * 7 + ( j  10 + k ) % 7] = 1 ;
                                                      ^