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#495 - Teemo Attacking
Problem Description
Our hero Teemo is attacking an enemy Ashe with poison attacks! When Teemo attacks Ashe, Ashe gets poisoned for a exactly duration seconds. More formally, an attack at second t will mean Ashe is poisoned during the inclusive time interval [t, t + duration - 1]. If Teemo attacks again before the poison effect ends, the timer for it is reset, and the poison effect will end duration seconds after the new attack.
You are given a non-decreasing integer array timeSeries, where timeSeries[i] denotes that Teemo attacks Ashe at second timeSeries[i], and an integer duration.
Return the total number of seconds that Ashe is poisoned.
Solution
/**
* @param {number[]} timeSeries
* @param {number} duration
* @return {number}
*/
var findPoisonedDuration = function(timeSeries, duration) {
return timeSeries.reduce((sum, n, i) => {
return sum + Math.min(duration, (timeSeries[i + 1] ?? n + duration) - n);
}, 0);
};