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/**

* @param {number[]} nums

* @return {number}

*/

var lengthOfLIS = function (nums) {

if (nums.length <= 1) {

return nums.length;

}

var f = new Array(nums.length).fill(1);

var ret = 1;

for (var i = 1; i < nums.length; i++) {

for (var k = 0; k < i; k++) {

if (nums[i] > nums[k]) {

f[i] = Math.max(f[i], f[k] + 1);

}

}

ret = Math.max(ret, f[i]);

}

return ret;

};