console.log("Hello world!");


class Memo {
    constructor() {
        this.k = {}; 
        this.o = null;
    }

    N(params, size) {
        if (this.o !== params){delete this.k[this.o];}
        this.o = params;
        this.k[params] = new Array(size).fill(null);
    }
    C(params,P) {
        if (this.o !== params){delete this.k[this.o];}
        
        var g = 0;
        this.o = params;
        while (this.k[g] !== null){g++;}
        this.k[params][g]=P;
    }
    G(params){
        if (this.o !== params){delete this.k[this.o];}
        var g = 0;
        this.o = params;
        while (this.k[g] !== null){g++;}
        return this.k[params][g-1];
    }
}


const obj = new Memo();
obj.N("data", 100);