1+1=3

for(int i=1;i<=n;i++){
  for(int j=1;j<=n;j++){
    for(int k=1;k<=n;k++){
      for(int l=1;l<=n;l++){

      }
    }
  }
}

______      ______  __  __      ______   _____   ______   
/\__  _\    /\  _  \/\ \/\ \    /\__  _\ /\  __ \/\__  _\   
\/_/\ \/    \ \ \ \ \ \ \/ /    \/_/\ \/ \ \ \/\ \/_/\ \/   
   \ \ \     \ \  __ \ \  <        \ \ \  \ \ \ \ \ \ \ \   
    \_\ \__   \ \ \/\ \ \ \\ \      \_\ \__\ \ \_\ \ \_\ \__  
    /\_____\   \ \_\ \_\ \_\ \_\    /\_____\\ \_____\/\_____\   
    \/_____/    \/_/\/_/\/_/\/_/    \/_____/ \/_____/\/_____/