2022-10-11

[Zheaoli]

2022-10-11

[Dapeus]

[gongpeione]

/*
 * @lc app=leetcode id=981 lang=typescript
 *
 * [981] Time Based Key-Value Store
 */

// @lc code=start
class TimeMap {
    store = {} as { [index: string]: [string, number][] }
    constructor() {

    }

    set(key: string, value: string, timestamp: number): void {
        const val = [value, timestamp] as [string, number];
        if (!this.store[key]) {
            this.store[key] = [val];
        } else {
            this.store[key].push(val);
        }
    }

    get(key: string, timestamp: number): string {
        let ans = '';
        const val = this.store[key];

        let left = 0;
        let right = val.length - 1;

        while (left <= right) {
            const middle = ~~((left + right) / 2);
            if (val[middle][1] <= timestamp) {
                // if current timestamp is greater than the middle element's timestamp
                // then we can set it to answer becasue we need to return the value
                // associtated with the largest
                ans = val[middle][0];
                left = middle + 1;
            } else {
                right = middle - 1;
            }
        }

        return ans;
    }
}

/**
 * Your TimeMap object will be instantiated and called as such:
 * var obj = new TimeMap()
 * obj.set(key,value,timestamp)
 * var param_2 = obj.get(key,timestamp)
 */
// @lc code=end

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