function main(input) {
  input = input.trim();
  const a = input.split(' ').map(Number);
  
  if(a[1]=='+'){
    console.log(parseInt(a[0])+parseInt(a[2]))
  }else if(a[1]=='-'){
    console.log(parseInt(a[0])-parseInt(a[2]))
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
