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var TimeLimitedCache = function() {
    this.ourMap = new Map();
};

/** 
 * @param {number} key
 * @param {number} value
 * @param {number} duration time until expiration in ms
 * @return {boolean} if un-expired key already existed
 */
TimeLimitedCache.prototype.set = function(key, value, duration) {
    if(this.ourMap.has(key)) {
        clearTimeout(timeOutid);
        this.ourMap.set(key,value);
        timeOutid = setTimeout(()=>{this.ourMap.delete(key)},duration);
        return true;
    }
    else {
        this.ourMap.set(key,value);
        timeOutid = setTimeout(()=>{this.ourMap.delete(key)},duration);
        return false;
    }
};

/** 
 * @param {number} key
 * @return {number} value associated with key
 */
TimeLimitedCache.prototype.get = function(key) {
    console.log(performance.now())
    if(this.ourMap.has(key)) return this.ourMap.get(key);
    else return -1;
};

/** 
 * @return {number} count of non-expired keys
 */
TimeLimitedCache.prototype.count = function() {
    return this.ourMap.size;
};

/**
 * Your TimeLimitedCache object will be instantiated and called as such:
 * var obj = new TimeLimitedCache()
 * obj.set(1, 42, 1000); // false
 * obj.get(1) // 42
 * obj.count() // 1
 */