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LeetCode/problems/3021-alice-and-bob-playing-flower-game/3021-alice-and-bob-playing-flower-game.js

/**
 * @param {number} n
 * @param {number} m
 * @return {number}
 */
var flowerGame = function(n, m) {
    return Math.ceil(n/2)*Math.floor(m/2)+Math.floor(n/2)*Math.ceil(m/2);
};

ProjectEuler/problems/15.js

let memo = new Map();
let blah = function(x,y){
  if(x==1 || y==1){return 1;}
  if(memo.has(x*21+y)){
    return memo.get(x*21+y);
  }
  memo.set( x*21+y, blah(x-1,y)+blah(x,y-1));
  return memo.get(x*21+y);
}

console.log( blah(21,21) );