var pc = 0;
var registers = {};
var lastsnd = 0;
var instructions = require("fs").readFileSync("input.txt").toString().split("\n").filter((a)=>(a));
while((pc >= 0) && (pc < instructions.length)){
	val = a => ((isNaN(parseInt(a))) ? (registers[a]) : (parseInt(a)));
	var instruction = instructions[pc];
	var parts = instruction.split(" ");
	switch(parts[0]){
		case "snd":
			lastsnd = val(parts[1]);
			break;
		case "set":
			registers[parts[1]] = val(parts[2]);
			break;
		case "add":
			registers[parts[1]] += val(parts[2]);
			break;
		case "mul":
			registers[parts[1]] *= val(parts[2]);
			break;
		case "mod":
			registers[parts[1]] = registers[parts[1]] % val(parts[2]);
			break;
		case "rcv":
			if(val(parts[1]) != 0){
				console.log(lastsnd);
				pc = instructions.length;
			}
			break;
		case "jgz":
			if(val(parts[1]) > 0){
				pc += (val(parts[2]) - 1);
			}
			break;
	}
	pc++;
}