// https://leetcode-cn.com/problems/arithmetic-slices-ii-subsequence/

var Test = require('./Common/Test');

var numberOfArithmeticSlices = function (nums) {

const maps = nums.map(_ => { });

console.log(maps);

for (let i = 0; i < nums.length - 1; i++) {

// const num = nums[i];

const prevMap = map[i];

for (let j = 1; j < nums.length; j++) {

const difference = nums[j] - nums[i];

const prevDifference = prevMap[difference];

const prevLength = prevDifference != undefined ? prevDifference : 0;

const map = maps[j];

if (difference in map) {

// map[difference]

}

else {

}

// if (!(difference in map)) {

// map[difference] = 0;

// }

// map[difference]++;

}

}

// for (const num of nums) {

// }

};

/*

var numberOfArithmeticSlices = function (A) {

return calc(A.length);

};

function calc(length) {

let result = 0;

for (let i = 3, isOdd = true; i <= length; i++, isOdd = !isOdd) {

if (i == 3) {

result = 1;

}

else {

let plus = 0;

const start = isOdd ? (i - 1) / 2 : i / 2;

for (let j = start; j >= 2; j--) {

plus += Math.trunc((i - 1) / j) - 1;

}

result += (i - 2) + plus;

}

}

return result;

}

*/

function test(a) {

Test.test(numberOfArithmeticSlices, a);

// Test.test(calc, 111);

// Test.test(calc, 1211);

// Test.test(calc, 4);

// Test.test(calc, 5);

// Test.test(calc, 6);

// Test.test(calc, 9);

// Test.test(calc, 10);

// Test.test(calc, 122211);

}

// test([2, 4, 6, 8, 10]);

// test([2, 2, 3, 4]);

test([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]); //55

// test([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30]);