Kth Largest Element in an array.cpp

#include <iostream>
#include <vector>
using namespace std;

class Solution {
public:
    int findKthLargest(vector<int>& nums, int k) {
  		int len = nums.size();
  		//k = len - k + 1;
  		return solve(nums, 0, len - 1, k);      
    }

    int solve(vector<int> nums, int l, int r, int k) {
    	int m = l;
    	for(int i = l + 1; i <= r; i++) {
    		if(nums[i] > nums[l]) {
    			m++;
    			int temp = nums[i];
    			nums[i] = nums[m];
    			nums[m] = temp;
    		}
    	}
    	int temp = nums[m];
    	nums[m] = nums[l];
    	nums[l] = temp;
    	if((m + 1 - l) == k) return nums[m];
    	else if((m + 1 - l) < k) return solve(nums, m + 1, r, k - (m + 1 - l));
    	else return solve(nums, l, m - 1, k);
    }
};

int main() {
	int arr[] = {4999,4998,4997,4996,4995,4994,4993,4992,4991,4990,4989,4988,4987,4986,4985,4984,4983,4982,4981,4980,4979,4978,4977,4976,4975,4974,4973,4972,4971,4970,4969,4968,4967,4966,4965,4964,4963,4962,4961,4960,4959,4958,4957,4956,4955,4954,4953,4952,4951,4950,4949,4948,4947,4946,4945,4944,4943,4942,4941,4940,4939,4938,4937,4936,4935,4934,4933,4932,4931,4930,4929,4928,4927,4926,4925,4924,4923,4922,4921,4920,4919,4918,4917,4916,4915,4914,4913,4912,4911,4910,4909,4908,4907,4906,4905,4904,4903,4902,4901,4900,4899,4898,4897,4896,4895,4894,4893,4892,4891,4890,4889,4888,4887,4886,4885,4884,4883,4882,4881,4880,4879,4878,4877,4876,4875,4874,4873,4872,4871,4870,4869,4868,4867,4866,4865,4864,4863,4862,4861,4860,4859,4858,4857,4856,4855,4854,4853,4852,4851,4850,4849,4848,4847,4846,4845,4844,4843,4842,4841,4840,4839,4838,4837,4836,4835,4834,4833,4832,4831,4830,4829,4828,4827,4826,4825,4824,4823,4822,4821,4820,4819,4818,4817,4816,4815,4814,4813,4812,4811,4810,4809,4808,4807,4806,4805,4804,4803,4802,4801,4800,4799,4798,4797,4796,4795,4794,4793,4792,4791,4790,4789,4788,4787,4786,4785,4784,4783,4782,4781,4780,4779,4778,4777,4776,4775,4774,4773,4772,4771,4770,4769,4768,4767,4766,4765,4764,4763,4762,4761,4760,4759,4758,4757,4756,4755,4754,4753,4752,4751,4750,4749,4748,4747,4746,4745,4744,4743,4742,4741,4740,4739,4738,4737,4736,4735,4734,4733,4732,4731,4730,4729,4728,4727,4726,4725,4724,4723,4722,4721,4720,4719,4718,4717,4716,4715,4714,4713,4712,4711,4710,4709,4708,4707,4706,4705,4704,4703,4702,4701,4700,4699,4698,4697,4696,4695,4694,4693,4692,4691,4690,4689,4688,4687,4686,4685,4684,4683,4682,4681,4680,4679,4678,4677,4676,4675,4674,4673,4672,4671,4670,4669,4668,4667,4666,4665,4664,4663,4662,4661,4660,4659,4658,4657,4656,4655,4654,4653,4652,4651,4650,4649,4648,4647,4646,4645,4644,4643,4642,4641,4640,4639,4638,4637,4636,4635,4634,4633,4632,4631,4630,4629,4628,4627,4626,4625,4624,4623,4622,4621,4620,4619,4618,4617,4616,4615,4614,4613,4612,4611,4610,4609,4608,4607,4606,4605,4604,4603,4602,4601,4600,4599,4598,4597,4596,4595,4594,4593,4592,4591,4590,4589,4588,4587,4586,4585,4584,4583,4582,4581,4580,4579,4578,4577,4576,4575,4574,4573,4572,4571,4570,4569,4568,4567,4566,4565,4564,4563,4562,4561,4560,4559,4558,4557,4556,4555,4554,4553,4552,4551,4550,4549,4548,4547,4546,4545,4544,4543,4542,4541,4540,4539,4538,4537,4536,4535,4534,4533,4532,4531,4530,4529,4528,4527,4526,4525,4524,4523,4522,4521,4520,4519,4518,4517,4516,4515,4514,4513,4512,4511,4510,4509,4508,4507,4506,4505,4504,4503,4502,4501,4500,4499,4498,4497,4496,4495,4494,4493,4492,4491,4490,4489,4488,4487,4486,4485,4484,4483,4482,4481,4480,4479,4478,4477,4476,4475,4474,4473,4472,4471,4470,4469,4468,4467,4466,4465,4464,4463,4462,4461,4460,4459,4458,4457,4456,4455,4454,4453,4452,4451,4450,4449,4448,4447,4446,4445,4444,4443,4442,4441,4440,4439,4438,4437,4436,4435,4434,4433,4432,4431,4430,4429,4428,4427,4426,4425,4424,4423,4422,4421,4420,4419,4418,4417,4416,4415,4414,4413,4412,4411,4410,4409,4408,4407,4406,4405,4404,4403,4402,4401,4400,4399,4398,4397,4396,4395,4394,4393,4392,4391,4390,4389,4388,4387,4386,4385,4384,4383,4382,4381,4380,4379,4378,4377,4376,4375,4374,4373,4372,4371,4370,4369,4368,4367,4366,4365,4364,4363,4362,4361,4360,4359,4358,4357,4356,4355,4354,4353,4352,4351,4350,4349,4348,4347,4346,4345,4344,4343,4342,4341,4340,4339,4338,4337,4336,4335,4334,4333,4332,4331,4330,4329,4328,4327,4326,4325,4324,4323,4322,4321,4320,4319,4318,4317,4316,4315,4314,4313,4312,4311,4310,4309,4308,4307,4306,4305,4304,4303,4302,4301,4300,4299,4298,4297,4296,4295,4294,4293,4292,4291,4290,4289,4288,4287,4286,4285,4284,4283,4282,4281,4280,4279,4278,4277,4276,4275,4274,4273,4272,4271,4270,4269,4268,4267,4266,4265,4264,4263,4262,4261,4260,4259,4258,4257,4256,4255,4254,4253,4252,4251,4250,4249,4248,4247,4246,4245,4244,4243,4242,4241,4240,4239,4238,4237,4236,4235,4234,4233,4232,4231,4230,4229,4228,4227,4226,4225,4224,4223,4222,4221,4220,4219,4218,4217,4216,4215,4214,4213,4212,4211,4210,4209,4208,4207,4206,4205,4204,4203,4202,4201,4200,4199,4198,4197,4196,4195,4194,4193,4192,4191,4190,4189,4188,4187,4186,4185,4184,4183,4182,4181,4180,4179,4178,4177,4176,4175,4174,4173,4172,4171,4170,4169,4168,4167,4166,4165,4164,4163,4162,4161,4160,4159,4158,4157,4156,4155,4154,4153,4152,4151,4150,4149,4148,4147,4146,4145,4144,4143,4142,4141,4140,4139,4138,4137,4136,4135,4134,4133,4132,4131,4130,4129,4128,4127,4126,4125,4124,4123,4122,4121,4120,4119,4118,4117,4116,4115,4114,4113,4112,4111,4110,4109,4108,4107,4106,4105,4104,4103,4102,4101,4100,4099,4098,4097,4096,4095,4094,4093,4092,4091,4090,4089,4088,4087,4086,4085,4084,4083,4082,4081,4080,4079,4078,4077,4076,4075,4074,4073,4072,4071,4070,4069,4068,4067,4066,4065,4064,4063,4062,4061,4060,4059,4058,4057,4056,4055,4054,4053,4052,4051,4050,4049,4048,4047,4046,4045,4044,4043,4042,4041,4040,4039,4038,4037,4036,4035,4034,4033,4032,4031,4030,4029,4028,4027,4026,4025,4024,4023,4022,4021,4020,4019,4018,4017,4016,4015,4014,4013,4012,4011,4010,4009,4008,4007,4006,4005,4004,4003,4002,4001,4000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	vector<int> v(arr, arr + 5000);
	Solution S;
	cout << S.findKthLargest(v, 1) << endl;
	return 0;
}