documentclass[11pt]{article}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage{lmodern}
usepackage[english]{babel}
usepackage{color}
usepackage{float}
usepackage{amsmath}
usepackage{graphicx}
usepackage{subfig}
usepackage{framed}
usepackage[linktocpage]{hyperref} % interactive bookmarks
usepackage{xcolor}