#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long long LL;

typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ll, ll> PLL;
#define endl '\n'
#define rep(i, a, b) for(ll i = (a); i <= (b); i++)
#define per(i, a, b) for(ll i = (a); i >= (b); i--)
const ll N = 30001;
#define debug(x) cout<<#x<<": "<<x<<endl

const ld eps = 1e-7;

ld o[1457]={0,0.6931472,1.0986123,1.3862944,1.7917595,2.4849067,2.7080502,3.4011974,4.0943446,4.6539604,4.7874917,5.3471075,6.0402547,6.7334019,7.1388670,7.7450028,7.8320142,8.4381500,9.1312972,9.5367623,9.6168050,10.2299095,10.3099522,11.0030993,11.6962465,12.1017116,12.7948588,13.1431655,13.8363127,14.5294599,14.9349250,15.6280722,16.0876045,16.3212193,16.7807517,17.4738988,17.8793640,18.5725111,19.2656583,19.9162459,20.6093931,21.0148582,21.7080054,22.4011525,22.6242961,22.8066176,23.2835417,23.3174433,23.9766889,24.3821540,25.0753012,25.7684484,25.9915919,26.1739135,26.6847391,26.7175289,27.4106761,27.8161412,28.5092884,29.2024356,29.4255791,29.6079007,30.1187263,30.3010479,30.3284468,30.8118735,31.0215940,31.4270591,32.1202063,32.8133535,33.0364970,33.2188186,33.7296442,33.9119658,34.4227914,34.7351661,35.1406312,35.8337784,36.5269255,36.7500691,36.9323907,37.4432163,37.6255378,38.1363635,38.4963662,38.5418286,38.9018313,39.5949785,40.2881257,40.5112692,40.6935908,41.2044164,41.3867379,41.8975636,42.3030287,42.3465138,42.7519789,42.9961759,43.4451261,44.1382733,44.3614168,44.5437384,45.0545640,45.2368855,45.7477112,46.1531763,46.4408584,46.8463235,47.4154180,48.1085652,48.3317087,48.5140303,49.0248559,49.2071775,49.7180031,50.1234682,50.4111503,50.8166154,51.4929554,51.5097626,52.1861026,52.4092462,52.5915677,53.1023934,53.2847149,53.7955405,54.2010056,54.4886877,54.8941528,54.9106821,55.6038293,56.2969765,56.5201200,56.7024416,57.2132672,57.3955888,57.9064144,58.3118795,58.5995616,59.0050267,59.6981739,59.8085219,59.8523245,60.5016691,60.7248127,60.9071342,61.4179598,61.6002814,62.1111070,62.5165721,62.8042542,63.2097193,63.9028665,64.0570172,64.0712018,64.7643490,64.9874925,65.1556295,65.1698141,65.6806397,65.8629613,66.3737869,66.7792520,67.0669341,67.4723992,68.1655464,68.3196970,68.3616612,68.7251621,69.0548084,69.4183093,69.4602735,69.9710992,70.1534207,70.6642463,71.0697114,71.3573935,71.7628586,72.4560058,72.6101565,72.7311091,73.0156216,73.3033037,73.4242563,73.7087688,73.8297214,74.3405470,74.4019160,74.5228686,75.0336942,75.4391593,75.7268414,76.1323065,76.8254537,76.9796043,77.3850694,77.6727515,78.0782166,78.2485620,78.7593876,78.7713638,78.9417092,79.4525348,79.8579999,80.1456820,80.5511471,81.2442943,81.3984449,81.8039101,82.0915921,82.4970572,83.1902044,83.2480240,83.4303455,83.9411712,84.3466363,84.6343183,85.0397835,85.7329306,85.8870813,86.2925464,86.5802285,86.9856936,87.6788408,87.8227350,88.0050565,88.5158821,88.9213472,89.2090293,89.6144944,90.3076416,90.4617923,90.8672574,91.1549395,91.5604046,92.2535518,92.4378555,92.6201770,93.1310027,93.5364678,93.8241498,94.2296149,94.9227621,95.0769128,95.4823779,95.7700600,96.1755251,96.8686723,97.0725845,97.2549060,97.7657316,98.1711968,98.4588788,98.8643439,99.5574911,99.7116418,100.1171069,100.4047890,100.8102541,101.5034013,101.7454133,101.9277349,102.4385605,102.8440256,103.1317077,103.5371728,104.2303200,104.3844706,104.7899357,105.0776178,105.4830829,106.1762301,106.4367612,106.6190827,106.8693773,107.1299084,107.5353735,107.8230555,108.2285207,108.9216678,109.0758185,109.4812836,109.7689657,110.1744308,110.8675780,111.1641490,111.5607252,111.8572962,112.2627613,112.5504434,112.9559085,113.6490557,113.8032063,114.2086714,114.4963535,114.9018186,115.5949658,116.2881130,116.7014833,117.1069484,117.3946304,117.8000956,118.4932427,118.6473934,119.0528585,119.3405406,119.7460057,120.4391529,121.1323001,121.5377652,121.5766806,121.9821457,122.2698278,122.6752929,123.3684401,123.5225907,123.9280558,124.2157379,124.6212030,125.3143502,126.0074974,126.4129625,126.4966615,126.9021266,127.1898087,127.5952738,128.2884210,128.4425717,128.8480368,129.1357188,129.5411840,130.2343311,130.9274783,131.3329434,131.4311355,131.8366006,132.1242826,132.5297477,133.2228949,133.3770456,133.7825107,134.0701928,134.4756579,135.1688051,135.8619523,136.2674174,136.4350818,136.8405469,136.9605645,137.1282289,137.5336940,138.2268412,138.3809919,138.7864570,139.0741391,139.4796042,140.1727514,140.8658986,141.2713637,141.4523616,141.8578267,141.9645108,142.1455088,142.5509739,143.2441211,143.3982717,143.8037369,144.0914189,144.4968840,145.1900312,145.8831784,146.2886435,146.5086074,146.9817907,147.2017546,147.6072197,148.3003669,148.4545175,148.8599827,149.1476647,149.5531298,150.2462770,150.9394242,151.3448893,152.0380365,152.2955048,152.7009699,153.3941171,153.5482677,153.9537329,154.2414149,154.6468800,155.3400272,156.0331744,156.4386395,157.1317867,157.4134986,157.8189637,158.5121109,158.6662616,159.0717267,159.3594087,159.7648738,160.4580210,161.1511682,161.5566333,162.2497805,162.2791081,162.8559163,162.9722553,163.6654025,163.8195532,164.2250183,164.5127003,164.9181654,165.6113126,166.3044598,166.7099249,167.4030721,168.0092079,168.1596411,168.8527883,169.0069390,169.4124041,169.7000861,170.1055512,170.7986984,171.4918456,171.8973107,172.5904579,173.1965937,173.3581381,174.0512853,174.2054360,174.6109011,174.8985832,175.3040483,175.9971955,176.6903426,177.0958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ll path[1457]={0,2,3,4,5,7,8,10,12,15,16,17,19,23,25,28,29,30,34,36,39,40,41,43,47,49,53,58,60,64,66,70,77,78,79,83,85,89,97,102,106,108,112,120,128,130,131,132,135,137,141,149,157,159,161,162,166,168,172,180,188,190,192,198,199,200,203,205,209,217,225,227,229,235,237,244,246,250,258,266,268,270,276,278,287,288,289,293,301,309,311,313,319,321,331,334,336,339,340,348,356,358,360,366,368,378,384,386,393,401,409,411,413,419,421,431,437,439,452,455,460,468,470,472,478,480,490,496,498,509,513,521,529,531,533,539,541,551,557,559,575,580,583,588,596,598,600,606,608,618,624,626,642,650,651,659,667,668,669,671,677,679,689,695,697,713,721,724,731,732,739,742,744,750,752,762,768,770,786,794,803,804,810,811,812,821,823,828,829,831,841,847,849,865,873,883,889,891,904,906,907,912,914,924,930,932,948,956,966,972,974,990,995,1001,1003,1013,1019,1021,1037,1045,1055,1061,1063,1079,1092,1098,1100,1110,1116,1118,1134,1142,1152,1158,1160,1176,1193,1199,1201,1211,1217,1219,1235,1243,1253,1259,1261,1277,1296,1302,1304,1314,1320,1322,1338,1346,1356,1362,1364,1380,1403,1409,1411,1421,1427,1429,1445,1453,1463,1469,1471,1487,1512,1518,1519,1520,1530,1536,1538,1554,1562,1572,1578,1580,1596,1625,1628,1633,1643,1649,1651,1667,1675,1685,1691,1693,1709,1741,1760,1770,1776,1778,1794,1802,1812,1818,1820,1836,1868,1890,1891,1901,1907,1909,1925,1933,1943,1949,1951,1967,1999,2021,2028,2038,2044,2046,2062,2070,2080,2086,2088,2104,2136,2158,2167,2177,2183,2185,2201,2209,2219,2225,2227,2243,2275,2297,2316,2326,2329,2332,2334,2350,2358,2368,2374,2376,2392,2424,2446,2467,2477,2478,2483,2485,2501,2509,2519,2525,2527,2543,2575,2597,2624,2629,2640,2642,2658,2666,2676,2682,2684,2700,2732,2754,2786,2803,2805,2821,2829,2839,2845,2847,2863,2895,2917,2949,2970,2972,2988,2996,3006,3012,3014,3030,3062,3084,3116,3137,3140,3145,3161,3169,3179,3185,3187,3203,3235,3257,3289,3313,3324,3340,3348,3358,3364,3366,3382,3414,3436,3468,3492,3505,3521,3529,3539,3545,3547,3563,3595,3617,3649,3673,3696,3705,3712,3720,3727,3730,3736,3738,3754,3786,3808,3840,3864,3889,3896,3905,3913,3918,3923,3929,3931,3947,3979,4001,4033,4057,4086,4089,4102,4110,4111,4120,4126,4128,4144,4176,4198,4230,4254,4285,4286,4301,4308,4309,4319,4325,4327,4343,4375,4397,4429,4453,4485,4507,4520,4530,4536,4538,4554,4586,4608,4640,4664,4696,4718,4743,4750,4759,4761,4777,4809,4831,4863,4887,4919,4941,4970,4973,4986,4988,5004,5036,5058,5090,5114,5146,5168,5199,5200,5215,5217,5233,5265,5287,5319,5343,5375,5397,5424,5429,5448,5450,5466,5498,5520,5552,5576,5608,5630,5662,5687,5689,5705,5737,5759,5791,5815,5847,5869,5901,5928,5930,5946,5978,6000,6032,6056,6088,6110,6142,6179,6181,6197,6229,6251,6283,6307,6339,6361,6393,6436,6438,6454,6486,6508,6540,6564,6596,6618,6650,6696,6701,6714,6717,6749,6771,6803,6827,6859,6881,6913,6959,6970,6981,6986,7013,7018,7040,7069,7072,7096,7128,7150,7182,7228,7241,7250,7257,7282,7289,7311,7338,7343,7367,7399,7421,7453,7499,7517,7518,7521,7534,7553,7566,7588,7609,7620,7644,7676,7698,7730,7776,7794,7798,7815,7830,7847,7869,7886,7901,7925,7957,7979,8011,8057,8075,8079,8098,8111,8130,8152,8167,8184,8208,8240,8262,8294,8340,8358,8362,8391,8394,8418,8423,8445,8477,8501,8533,8555,8587,8633,8651,8655,8687,8711,8730,8743,8752,8784,8808,8840,8862,8894,8940,8958,8962,8994,9018,9041,9050,9063,9095,9118,9119,9150,9151,9173,9205,9251,9269,9273,9305,9329,9354,9361,9376,9407,9408,9429,9432,9461,9464,9486,9518,9564,9582,9586,9618,9642,9671,9674,9693,9720,9725,9742,9749,9774,9781,9803,9835,9881,9899,9903,9935,9959,9991,10024,10037,10055,10056,10059,10080,10091,10112,10134,10166,10212,10230,10234,10266,10290,10322,10361,10368,10386,10390,10417,10422,10449,10471,10503,10549,10567,10571,10603,10627,10659,10705,10723,10727,10759,10796,10818,10850,10896,10914,10918,10950,10974,11006,11052,11070,11074,11106,11145,11167,11199,11245,11263,11267,11299,11323,11355,11401,11419,11423,11455,11498,11519,11520,11552,11598,11616,11620,11652,11676,11708,11754,11772,11776,11801,11808,11857,11872,11879,11911,11957,11975,11979,12011,12035,12067,12113,12131,12135,12167,12224,12231,12246,12278,12324,12342,12346,12378,12402,12434,12480,12498,12502,12534,12597,12598,12619,12651,12697,12715,12719,12751,12775,12807,12853,12871,12875,12907,12971,12998,13030,13076,13094,13098,13130,13154,13186,13232,13250,13254,13286,13350,13381,13413,13459,13477,13481,13513,13537,13569,13615,13633,13637,13669,13733,13770,13802,13848,13866,13870,13902,13926,13958,14004,14022,14026,14058,14113,14122,14145,14167,14199,14245,14263,14267,14299,14323,14355,14401,14419,14423,14455,14514,14519,14546,14568,14600,14646,14664,14668,14700,14724,14756,14802,14820,14824,14856,14920,14955,14977,15009,15055,15073,15077,15109,15133,15165,15211,15229,15233,15265,15329,15374,15396,15428,15474,15492,15496,15528,15552,15584,15630,15648,15652,15684,15748,15795,15817,15849,15895,15913,15917,15949,15973,16005,16051,16069,16073,16105,16169,16226,16248,16277,16280,16326,16344,16348,16377,16380,16404,16436,16482,16500,16504,16536,16600,16659,16681,16708,16713,16759,16777,16781,16808,16813,16837,16869,16915,16933,16937,16969,17033,17098,17120,17141,17152,17198,17216,17220,17241,17252,17276,17308,17354,17372,17376,17408,17472,17541,17563,17595,17641,17659,17663,17695,17719,17751,17797,17815,17819,17851,17915,17990,18012,18043,18044,18090,18108,18112,18144,18168,18200,18246,18264,18268,18300,18364,18447,18462,18469,18492,18501,18540,18547,18565,18569,18601,18625,18657,18703,18721,18725,18757,18821,18908,18919,18929,18930,18949,18962,18997,19008,19026,19029,19030,19062,19086,19118,19164,19182,19186,19218,19282,19371,19380,19390,19393,19410,19425,19458,19471,19489,19490,19493,19525,19549,19581,19627,19645,19649,19681,19745,19838,19843,19853,19860,19873,19892,19921,19938,19953,19960,19992,20016,20048,20094,20112,20116,20148,20212,20310,20320,20339,20340,20366,20371,20388,20417,20420,20439,20471,20495,20527,20573,20591,20595,20627,20691,20789,20799,20819,20845,20853,20858,20867,20899,20926,20958,20982,21014,21060,21078,21082,21114,21178,21276,21286,21306,21332,21340,21349,21354,21386,21417,21449,21473,21505,21551,21569,21573,21605,21669,21767,21777,21797,21823,21831,21841,21845,21877,21916,21941,21948,21972,22004,22050,22068,22072,22104,22168,22266,22276,22296,22322,22330,22340,22344,22376,22419,22440,22451,22475,22507,22553,22571,22575,22607,22671,22769,22779,22799,22825,22833,22843,22847,22879,22928,22943,22960,22984,23016,23062,23080,23084,23116,23180,23278,23288,23308,23334,23342,23352,23356,23388,23449,23452,23481,23505,23537,23583,23601,23605,23637,23701,23799,23809,23829,23855,23863,23873,23877,23909,23972,23973,24004,24028,24060,24106,24124,24128,24160,24224,24322,24332,24352,24378,24386,24396,24400,24432,24496,24545,24569,24601,24647,24665,24669,24701,24765,24863,24873,24893,24919,24927,24937,24941,24973,25037,25092,25116,25148,25194,25212,25216,25248,25312,25410,25420,25440,25466,25474,25484,25488,25520,25584,25649,25673,25705,25751,25769,25773,25805,25869,25967,25977,25997,26023,26031,26041,26045,26077,26141,26211,26212,26236,26268,26314,26332,26336,26368,26432,26530,26540,26560,26586,26594,26604,26608,26640,26704,26774,26781,26802,26805,26832,26837,26883,26901,26905,26937,27001,27099,27109,27129,27155,27163,27173,27177,27209,27273,27343,27352,27371,27376,27401,27408,27454,27472,27476,27508,27572,27670,27680,27700,27726,27734,27744,27748,27780,27844,27914,27929,27942,27953,27972,27985,28031,28049,28053,28085,28149,28247,28257,28277,28303,28311,28321,28325,28357,28421,28491,28516,28519,28540,28549,28572,28618,28636,28640,28672,28736,28834,28844,28864,28890,28898,28908,28912,28944,29008,29078,29106,29133,29136,29165,29211,29229,29233,29265,29329,29427,29437,29457,29483,29491,29501,29505,29537,29601,29671,29699,29729,29763,29764,29810,29828,29832,29864};

void solve()
{
    int x;
    cin>>x;
    for(int i=0;i<1457;i++)
    {
        if(x>=path[i] && (i == 1456 || x < path[i + 1]))
        {
            cout<<fixed<<setprecision(7)<<o[i]<<endl;
            return;
        }
    }

}

int main()
{

    // #ifndef ONLINE_JUDGE
    //     freopen("test.in","r",stdin);
    //     freopen("test.out","w",stdout);
    // #endif
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    ll T=1;
     cin>>T;
    while(T--)
    {
        solve();
    }
    return 0;
}