function Main (input) {

　 var line  = input.split(' ');
    var n = parseInt(line[0]);
    var m = parseInt(line[1]);
    fib(n,m);
}

function fib (n,m){
    var a = 0;
    var b = 1;
    var c = (a + b) % m;

if (n <= 3 ) {
   switch (n) {
       case 1: 
            document.writel(a)
            break;
       case 2:
            document.writel(b)
            break;
       case 3:
            document.writel(c)
            break;
       default:
            break;
    }
} else {
    for (i = 4 ; i <= n; i++) {
        a = b ;
        b = c ;
        c = (a + b) % m ;
    }
	    document.writeln(c);
	}
}