function main(input){
	input=input.split("\n");
var X=input[0];

if(400<=X,X<=599){console.log("8");
	}else if(600<=X,X<=799){console.log("7");
		} else if(800<=X,X<=999){console.log("6");
			}else if(1000<=X,X<=1199){console.log("5");
				}else if(1200<=X,X<=1399){console.log("4");
					}else if(1400<=X,X<=1599){console.log("3");
						}else if(1600<=X,X<=1799){console.log("2");
							}else if(1800<=X,X<=1999){console.log("1");
								}


}

main(require("fs").readFileSync("/dev/stdin", "utf8"));
