function Main(str){
    var splited = [];
    var goukei = 0;
    splited = str.split("");
    console.log(splited);
    for(var i = 0; i < 3; i++){
      if(splited[i] == '+') goukei = goukei + 1;
      if(splited[i] == '-') goukei = goukei - 1;
    }
  console.log(goukei);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));