#include<stdio.h>

int main()
{
    float g[401];
    g[0] = 0.0;
    g[1] = 0.0;
    g[2] = 0.0;
    g[3] = 0.0;
    g[4] = 0.0;
    g[5] = 0.0;
    g[6] = 0.0;
    g[7] = 0.0;
    g[8] = 0.0;
    g[9] = 0.0;
    g[10] = 0.0;
    g[11] = 0.0;
    g[12] = 0.0;
    g[13] = 0.0;
    g[14] = 0.0;
    g[15] = 0.0;
    g[16] = 0.0;
    g[17] = 0.0;
    g[18] = 0.0;
    g[19] = 0.0;
    g[20] = 0.0;
    g[21] = 0.0;
    g[22] = 0.0;
    g[23] = 0.0;
    g[24] = 0.0;
    g[25] = 0.0;
    g[26] = 0.0;
    g[27] = 0.0;
    g[28] = 0.0;
    g[29] = 0.0;
    g[30] = 0.0;
    g[31] = 0.0;
    g[32] = 0.0;
    g[33] = 0.0;
    g[34] = 0.0;
    g[35] = 0.0;
    g[36] = 0.0;
    g[37] = 0.0;
    g[38] = 0.0;
    g[39] = 0.0;
    g[40] = 0.0;
    g[41] = 0.0;
    g[42] = 0.0;
    g[43] = 0.0;
    g[44] = 0.0;
    g[45] = 0.0;
    g[46] = 0.0;
    g[47] = 0.0;
    g[48] = 0.0;
    g[49] = 0.0;
    g[50] = 0.0;
    g[51] = 0.0;
    g[52] = 0.0;
    g[53] = 0.0;
    g[54] = 0.0;
    g[55] = 0.0;
    g[56] = 0.0;
    g[57] = 0.0;
    g[58] = 0.0;
    g[59] = 0.0;
    g[60] = 1.0;
    g[61] = 1.0;
    g[62] = 1.7;
    g[63] = 1.7;
    g[64] = 1.7;
    g[65] = 2.0;
    g[66] = 2.0;
    g[67] = 2.3;
    g[68] = 2.3;
    g[69] = 2.3;
    g[70] = 2.7;
    g[71] = 2.7;
    g[72] = 2.7;
    g[73] = 2.7;
    g[74] = 2.7;
    g[75] = 3.0;
    g[76] = 3.0;
    g[77] = 3.0;
    g[78] = 3.0;
    g[79] = 3.0;
    g[80] = 3.3;
    g[81] = 3.3;
    g[82] = 3.3;
    g[83] = 3.3;
    g[84] = 3.3;
    g[85] = 3.7;
    g[86] = 3.7;
    g[87] = 3.7;
    g[88] = 3.7;
    g[89] = 3.7;
    g[90] = 4.0;
    g[91] = 4.0;
    g[92] = 4.0;
    g[93] = 4.0;
    g[94] = 4.0;
    g[95] = 4.3;
    g[96] = 4.3;
    g[97] = 4.3;
    g[98] = 4.3;
    g[99] = 4.3;
    g[100] = 4.3;
    g[101] = 4.3;
    g[102] = 4.3;
    g[103] = 4.3;
    g[104] = 4.3;
    g[105] = 4.3;
    g[106] = 4.3;
    g[107] = 4.3;
    g[108] = 4.3;
    g[109] = 4.3;
    g[110] = 4.3;
    g[111] = 4.3;
    g[112] = 4.3;
    g[113] = 4.3;
    g[114] = 4.3;
    g[115] = 4.3;
    g[116] = 4.3;
    g[117] = 4.3;
    g[118] = 4.3;
    g[119] = 4.3;
    g[120] = 4.3;
    g[121] = 4.3;
    g[122] = 4.3;
    g[123] = 4.3;
    g[124] = 4.3;
    g[125] = 4.3;
    g[126] = 4.3;
    g[127] = 4.3;
    g[128] = 4.3;
    g[129] = 4.3;
    g[130] = 4.3;
    g[131] = 4.3;
    g[132] = 4.4;
    g[133] = 4.4;
    g[134] = 4.6;
    g[135] = 4.7;
    g[136] = 4.7;
    g[137] = 5.0;
    g[138] = 5.0;
    g[139] = 5.0;
    g[140] = 5.4;
    g[141] = 5.4;
    g[142] = 5.4;
    g[143] = 5.4;
    g[144] = 5.4;
    g[145] = 5.7;
    g[146] = 5.7;
    g[147] = 5.7;
    g[148] = 5.7;
    g[149] = 5.7;
    g[150] = 6.0;
    g[151] = 6.0;
    g[152] = 6.0;
    g[153] = 6.0;
    g[154] = 6.0;
    g[155] = 6.4;
    g[156] = 6.4;
    g[157] = 6.4;
    g[158] = 6.4;
    g[159] = 6.4;
    g[160] = 6.7;
    g[161] = 6.7;
    g[162] = 6.7;
    g[163] = 6.7;
    g[164] = 6.7;
    g[165] = 7.0;
    g[166] = 7.0;
    g[167] = 7.0;
    g[168] = 7.0;
    g[169] = 7.0;
    g[170] = 7.4;
    g[171] = 7.4;
    g[172] = 7.4;
    g[173] = 7.4;
    g[174] = 7.4;
    g[175] = 7.7;
    g[176] = 7.7;
    g[177] = 7.7;
    g[178] = 7.7;
    g[179] = 7.7;
    g[180] = 8.0;
    g[181] = 8.0;
    g[182] = 8.0;
    g[183] = 8.0;
    g[184] = 8.0;
    g[185] = 8.3;
    g[186] = 8.3;
    g[187] = 8.3;
    g[188] = 8.3;
    g[189] = 8.3;
    g[190] = 8.6;
    g[191] = 8.6;
    g[192] = 8.6;
    g[193] = 8.6;
    g[194] = 8.6;
    g[195] = 8.6;
    g[196] = 8.6;
    g[197] = 8.6;
    g[198] = 8.6;
    g[199] = 8.6;
    g[200] = 8.6;
    g[201] = 8.6;
    g[202] = 8.6;
    g[203] = 8.6;
    g[204] = 8.6;
    g[205] = 8.6;
    g[206] = 8.6;
    g[207] = 8.6;
    g[208] = 8.6;
    g[209] = 8.6;
    g[210] = 8.6;
    g[211] = 8.6;
    g[212] = 8.6;
    g[213] = 8.6;
    g[214] = 8.6;
    g[215] = 8.6;
    g[216] = 8.6;
    g[217] = 8.6;
    g[218] = 8.6;
    g[219] = 8.6;
    g[220] = 8.7;
    g[221] = 8.7;
    g[222] = 8.7;
    g[223] = 8.7;
    g[224] = 8.7;
    g[225] = 9.1;
    g[226] = 9.1;
    g[227] = 9.1;
    g[228] = 9.1;
    g[229] = 9.1;
    g[230] = 9.4;
    g[231] = 9.4;
    g[232] = 9.4;
    g[233] = 9.4;
    g[234] = 9.4;
    g[235] = 9.7;
    g[236] = 9.7;
    g[237] = 9.7;
    g[238] = 9.7;
    g[239] = 9.7;
    g[240] = 10.1;
    g[241] = 10.1;
    g[242] = 10.1;
    g[243] = 10.1;
    g[244] = 10.1;
    g[245] = 10.4;
    g[246] = 10.4;
    g[247] = 10.4;
    g[248] = 10.4;
    g[249] = 10.4;
    g[250] = 10.7;
    g[251] = 10.7;
    g[252] = 10.7;
    g[253] = 10.7;
    g[254] = 10.7;
    g[255] = 11.1;
    g[256] = 11.1;
    g[257] = 11.1;
    g[258] = 11.1;
    g[259] = 11.1;
    g[260] = 11.4;
    g[261] = 11.4;
    g[262] = 11.4;
    g[263] = 11.4;
    g[264] = 11.4;
    g[265] = 11.7;
    g[266] = 11.7;
    g[267] = 11.7;
    g[268] = 11.7;
    g[269] = 11.7;
    g[270] = 12.0;
    g[271] = 12.0;
    g[272] = 12.0;
    g[273] = 12.0;
    g[274] = 12.0;
    g[275] = 12.3;
    g[276] = 12.3;
    g[277] = 12.3;
    g[278] = 12.3;
    g[279] = 12.3;
    g[280] = 12.6;
    g[281] = 12.6;
    g[282] = 12.6;
    g[283] = 12.6;
    g[284] = 12.6;
    g[285] = 12.9;
    g[286] = 12.9;
    g[287] = 12.9;
    g[288] = 12.9;
    g[289] = 12.9;
    g[290] = 12.9;
    g[291] = 12.9;
    g[292] = 12.9;
    g[293] = 12.9;
    g[294] = 12.9;
    g[295] = 12.9;
    g[296] = 12.9;
    g[297] = 12.9;
    g[298] = 12.9;
    g[299] = 12.9;
    g[300] = 12.9;
    g[301] = 12.9;
    g[302] = 12.9;
    g[303] = 12.9;
    g[304] = 12.9;
    g[305] = 12.9;
    g[306] = 12.9;
    g[307] = 12.9;
    g[308] = 12.9;
    g[309] = 12.9;
    g[310] = 12.9;
    g[311] = 12.9;
    g[312] = 12.9;
    g[313] = 12.9;
    g[314] = 12.9;
    g[315] = 13.1;
    g[316] = 13.1;
    g[317] = 13.1;
    g[318] = 13.1;
    g[319] = 13.1;
    g[320] = 13.4;
    g[321] = 13.4;
    g[322] = 13.4;
    g[323] = 13.4;
    g[324] = 13.4;
    g[325] = 13.8;
    g[326] = 13.8;
    g[327] = 13.8;
    g[328] = 13.8;
    g[329] = 13.8;
    g[330] = 14.1;
    g[331] = 14.1;
    g[332] = 14.1;
    g[333] = 14.1;
    g[334] = 14.1;
    g[335] = 14.4;
    g[336] = 14.4;
    g[337] = 14.4;
    g[338] = 14.4;
    g[339] = 14.4;
    g[340] = 14.8;
    g[341] = 14.8;
    g[342] = 14.8;
    g[343] = 14.8;
    g[344] = 14.8;
    g[345] = 15.1;
    g[346] = 15.1;
    g[347] = 15.1;
    g[348] = 15.1;
    g[349] = 15.1;
    g[350] = 15.4;
    g[351] = 15.4;
    g[352] = 15.4;
    g[353] = 15.4;
    g[354] = 15.4;
    g[355] = 15.7;
    g[356] = 15.7;
    g[357] = 15.7;
    g[358] = 15.7;
    g[359] = 15.7;
    g[360] = 16.0;
    g[361] = 16.0;
    g[362] = 16.0;
    g[363] = 16.0;
    g[364] = 16.0;
    g[365] = 16.3;
    g[366] = 16.3;
    g[367] = 16.3;
    g[368] = 16.3;
    g[369] = 16.3;
    g[370] = 16.6;
    g[371] = 16.6;
    g[372] = 16.6;
    g[373] = 16.6;
    g[374] = 16.6;
    g[375] = 16.9;
    g[376] = 16.9;
    g[377] = 16.9;
    g[378] = 16.9;
    g[379] = 16.9;
    g[380] = 17.2;
    g[381] = 17.2;
    g[382] = 17.2;
    g[383] = 17.2;
    g[384] = 17.2;
    g[385] = 17.2;
    g[386] = 17.2;
    g[387] = 17.2;
    g[388] = 17.2;
    g[389] = 17.2;
    g[390] = 17.2;
    g[391] = 17.2;
    g[392] = 17.2;
    g[393] = 17.2;
    g[394] = 17.2;
    g[395] = 17.2;
    g[396] = 17.2;
    g[397] = 17.2;
    g[398] = 17.2;
    g[399] = 17.2;
    g[400] = 17.2;
    int t;
    scanf("%d", &t);
    for (int r = 0; r < t; r++) {
        int n;
        scanf("%d", &n);
        printf("%.1f\n", g[n]);
    }
    return 0;
}