Compilare: user.cpp: In function ‘void multiply_matrix(long long int)’: user.cpp:18:51: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(M[i][1]*M[1][j]+M[i][2]*M[2][j])%mod; ^ user.cpp:18:56: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(M[i][1]*M[1][j]+M[i][2]*M[2][j])%mod; ^ user.cpp:27:55: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(Sol[i][1]*M[1][j]+Sol[i][2]*M[2][j])%mod; ^ user.cpp:27:60: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(Sol[i][1]*M[1][j]+Sol[i][2]*M[2][j])%mod; ^ user.cpp:18:43: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(M[i][1]*M[1][j]+M[i][2]*M[2][j])%mod; ^ user.cpp:18:59: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(M[i][1]*M[1][j]+M[i][2]*M[2][j])%mod; ^ user.cpp:27:45: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(Sol[i][1]*M[1][j]+Sol[i][2]*M[2][j])%mod; ^ user.cpp:27:63: warning: array subscript is above array bounds [-Warray-bounds] aux[i][j]=(Sol[i][1]*M[1][j]+Sol[i][2]*M[2][j])%mod; ^ user.cpp: In function ‘int main()’: user.cpp:45:23: warning: array subscript is above array bounds [-Warray-bounds] M[1][1]=a%mod; M[2][1]=b%mod; ^ user.cpp:46:11: warning: array subscript is above array bounds [-Warray-bounds] M[1][2]=b%mod; M[2][2]=a%mod; ^ user.cpp:46:26: warning: array subscript is above array bounds [-Warray-bounds] M[1][2]=b%mod; M[2][2]=a%mod; ^ user.cpp:46:23: warning: array subscript is above array bounds [-Warray-bounds] M[1][2]=b%mod; M[2][2]=a%mod; ^