Double Elements

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Language is selected by the extension of the file. See the list of supported languages to know the extension of your language.

Problem

Double each element.

Options

exec is denied

no deadline, the server will not save your submission

Sample input:_

[704,587,245,572,570,203,247,446,277,652,962,622,639,310,36,440,84,535,637,147,70,544,929,384,564,998,759,686,352,170,946,721,303,399,656,678,407,239,404,697,314,193,396,622,109,147,921,781,653,310,384,284,842,121,688,864,622,386,769,2,740,182,745,626,321,527,571,566,384,321,227,199,282,258,33,997,720,302,531,516,998,758,204,690,752,397,826,620,630,515,497,74,329,598,221,93,186,131,104,622,402,844,986,170,498,160,817,385,712,445,829,581,888,397,865,724,855,465,436,49,137,576,473,352,992,8,54,646,983,464,586,315,655,517,893,756,784,885,910,854,238,188,469,524,614,700,309,329,749,94,624,340,718,957,346,383,379,770,980,764,618,48,664,75,516,251,412,486,186,292,41,319,552,58,266,795,863,32,93,762,0,171,459,228,722,90,608,689,705,226,73,517,222,42,434,163,695,397,856,227,259,373,624,763,574,731,36,536,89,113,872,679,429,678,989,435,172,427,185,146,998,756,103,834,668,631,509,216,654,125,154,841,235,667,621,159,609,225,770,925,627,603,866,489,814,797,53,980,910,263,565,733,972,114,984,621,907,999,603,800,242,678,638,48,7,375,377,251,488,568,75,978,649,572,390,846,358,506,926,1,248,15,175,102,659,468,320,753,284,565,611,35,194,984,575,383,754,993,239,909,577,406,678,513,682,658,915,696,571,225,682,523,518,218,135,587,769,554,443,59,146,37,914,524,150,6,793,300,990,47,458,187,659,600,459,713,111,135,613,942,416,912,225,159,725,945,634,702,689,429,221,952,738,656,844,474,704,114,471,347,621,675,405,109,33,403,393,921,242,559,540,654,793,536,164,773,851,853,229,389,386,353,75,177,193,736,806,33,623,970,682,502,478,13,179,92,973,112,581,528,208,172,301,14,603,566,189,915,205,21,921,67,364,198,987,409,936,993,287,103,438,706,760,786,685,725,88,13,735,134,136,129,9,820,60,222,574,566,753,400,170,754,359,406,894,502,329,941,639,899,515,749,12,819,74,322,247,798,362,418,179,833,316,469,203,894,573,707,584,256,871,673,123,588,504,91,654,532,232,806,960,437,172,813,889,265,239,145,621,737,359,87,837,985,864,379,837,19,101,535,5,566,763,280,937,318,603,164,446,781,502,583,723,274,648,70,167,924,15,399,143,558,618,49,841,623,224,955,755,599,437,605,410,924,512,88,557,5,142,839,675,929,971,260,694,431,808,297,790,958,166,901,877,853,57,780,822,45,306,227,201,317,888,551,217,800,393,756,930,367,594,88,272,553,986,199,110,719,26,155,922,460,49,241,323,908,0,548,851,320,198,132,925,580,621,307,72,220,390,103,380,437,641,791,62,76,234,549,894,412,662,246,439,932,546,187,385,913,751,960,488,166,207,418,806,815,883,758,925,776,22,881,963,280,237,189,608,177,990,248,366,141,998,391,132,719,613,479,252,53,453,839,32,319,762,569,291,647,975,791,788,850,260,942,365,971,479,693,879,194,97,105,417,263,963,888,611,948,447,853,639,216,449,749,796,427,483,31,688,6,297,216,464,262,712,901,357,356,304,47,85,817,31,403,774,702,871,308,121,212,609,328,729,941,114,246,928,15,198,451,211,852,413,818,157,698,41,129,918,627,615,239,340,210,22,961,11,179,527,594,582,39,526,190,565,132,939,112,352,257,440,417,297,971,913,284,849,201,144,431,243,694,753,246,736,865,493,603,11,522,504,530,332,420,741,345,2,982,517,321,714,294,434,245,600,268,686,547,67,869,466,584,444,880,685,863,29,642,350,484,513,977,172,317,615,278,652,916,190,127,280,458,14,604,895,96,8,518,426,669,17,542,242,291,485,408,341,938,255,360,964,319,192,389,569,731,52,649,908,369,86,242,802,97,13,540,645,553,914,908,976,911,258,195,866,53,103,974,910,561,904,156,928,992,420,98,932,227,461,598,540,683,338,833,698,349,451,542,504,424,446,470,840,713,615,499,209,299,84,394,942,667,190,205,446,63,731,804,402,387,278,661,753,746,316,900,345,285,513,36,983,989,891,363,742,390,43,335,572,981,407,217,602,389,698,568,324,628,538,246,83,538,859,607,381,888,75,658,129,884,379,683,835,778,490,703,778,865,636,772,869,110,908,191,511,726,467,236,341,178,970,926,170,885,591,639,539,433,912,297,345,79,211,126,746,497,777,565,663,636,277,174,21,900,267,629,324,596,118,473,644,886,542,682,873,364,828,648,493,714]

Sample output:

1408,1174,490,1144,1140,406,494,892,554,1304,1924,1244,1278,620,72,880,168,1070,1274,294,140,1088,1858,768,1128,1996,1518,1372,704,340,1892,1442,606,798,1312,1356,814,478,808,1394,628,386,792,1244,218,294,1842,1562,1306,620,768,568,1684,242,1376,1728,1244,772,1538,4,1480,364,1490,1252,642,1054,1142,1132,768,642,454,398,564,516,66,1994,1440,604,1062,1032,1996,1516,408,1380,1504,794,1652,1240,1260,1030,994,148,658,1196,442,186,372,262,208,1244,804,1688,1972,340,996,320,1634,770,1424,890,1658,1162,1776,794,1730,1448,1710,930,872,98,274,1152,946,704,1984,16,108,1292,1966,928,1172,630,1310,1034,1786,1512,1568,1770,1820,1708,476,376,938,1048,1228,1400,618,658,1498,188,1248,680,1436,1914,692,766,758,1540,1960,1528,1236,96,1328,150,1032,502,824,972,372,584,82,638,1104,116,532,1590,1726,64,186,1524,0,342,918,456,1444,180,1216,1378,1410,452,146,1034,444,84,868,326,1390,794,1712,454,518,746,1248,1526,1148,1462,72,1072,178,226,1744,1358,858,1356,1978,870,344,854,370,292,1996,1512,206,1668,1336,1262,1018,432,1308,250,308,1682,470,1334,1242,318,1218,450,1540,1850,1254,1206,1732,978,1628,1594,106,1960,1820,526,1130,1466,1944,228,1968,1242,1814,1998,1206,1600,484,1356,1276,96,14,750,754,502,976,1136,150,1956,1298,1144,780,1692,716,1012,1852,2,496,30,350,204,1318,936,640,1506,568,1130,1222,70,388,1968,1150,766,1508,1986,478,1818,1154,812,1356,1026,1364,1316,1830,1392,1142,450,1364,1046,1036,436,270,1174,1538,1108,886,118,292,74,1828,1048,300,12,1586,600,1980,94,916,374,1318,1200,918,1426,222,270,1226,1884,832,1824,450,318,1450,1890,1268,1404,1378,858,442,1904,1476,1312,1688,948,1408,228,942,694,1242,1350,810,218,66,806,786,1842,484,1118,1080,1308,1586,1072,328,1546,1702,1706,458,778,772,706,150,354,386,1472,1612,66,1246,1940,1364,1004,956,26,358,184,1946,224,1162,1056,416,344,602,28,1206,1132,378,1830,410,42,1842,134,728,396,1974,818,1872,1986,574,206,876,1412,1520,1572,1370,1450,176,26,1470,268,272,258,18,1640,120,444,1148,1132,1506,800,340,1508,718,812,1788,1004,658,1882,1278,1798,1030,1498,24,1638,148,644,494,1596,724,836,358,1666,632,938,406,1788,1146,1414,1168,512,1742,1346,246,1176,1008,182,1308,1064,464,1612,1920,874,344,1626,1778,530,478,290,1242,1474,718,174,1674,1970,1728,758,1674,38,202,1070,10,1132,1526,560,1874,636,1206,328,892,1562,1004,1166,1446,548,1296,140,334,1848,30,798,286,1116,1236,98,1682,1246,448,1910,1510,1198,874,1210,820,1848,1024,176,1114,10,284,1678,1350,1858,1942,520,1388,862,1616,594,1580,1916,332,1802,1754,1706,114,1560,1644,90,612,454,402,634,1776,1102,434,1600,786,1512,1860,734,1188,176,544,1106,1972,398,220,1438,52,310,1844,920,98,482,646,1816,0,1096,1702,640,396,264,1850,1160,1242,614,144,440,780,206,760,874,1282,1582,124,152,468,1098,1788,824,1324,492,878,1864,1092,374,770,1826,1502,1920,976,332,414,836,1612,1630,1766,1516,1850,1552,44,1762,1926,560,474,378,1216,354,1980,496,732,282,1996,782,264,1438,1226,958,504,106,906,1678,64,638,1524,1138,582,1294,1950,1582,1576,1700,520,1884,730,1942,958,1386,1758,388,194,210,834,526,1926,1776,1222,1896,894,1706,1278,432,898,1498,1592,854,966,62,1376,12,594,432,928,524,1424,1802,714,712,608,94,170,1634,62,806,1548,1404,1742,616,242,424,1218,656,1458,1882,228,492,1856,30,396,902,422,1704,826,1636,314,1396,82,258,1836,1254,1230,478,680,420,44,1922,22,358,1054,1188,1164,78,1052,380,1130,264,1878,224,704,514,880,834,594,1942,1826,568,1698,402,288,862,486,1388,1506,492,1472,1730,986,1206,22,1044,1008,1060,664,840,1482,690,4,1964,1034,642,1428,588,868,490,1200,536,1372,1094,134,1738,932,1168,888,1760,1370,1726,58,1284,700,968,1026,1954,344,634,1230,556,1304,1832,380,254,560,916,28,1208,1790,192,16,1036,852,1338,34,1084,484,582,970,816,682,1876,510,720,1928,638,384,778,1138,1462,104,1298,1816,738,172,484,1604,194,26,1080,1290,1106,1828,1816,1952,1822,516,390,1732,106,206,1948,1820,1122,1808,312,1856,1984,840,196,1864,454,922,1196,1080,1366,676,1666,1396,698,902,1084,1008,848,892,940,1680,1426,1230,998,418,598,168,788,1884,1334,380,410,892,126,1462,1608,804,774,556,1322,1506,1492,632,1800,690,570,1026,72,1966,1978,1782,726,1484,780,86,670,1144,1962,814,434,1204,778,1396,1136,648,1256,1076,492,166,1076,1718,1214,762,1776,150,1316,258,1768,758,1366,1670,1556,980,1406,1556,1730,1272,1544,1738,220,1816,382,1022,1452,934,472,682,356,1940,1852,340,1770,1182,1278,1078,866,1824,594,690,158,422,252,1492,994,1554,1130,1326,1272,554,348,42,1800,534,1258,648,1192,236,946,1288,1772,1084,1364,1746,728,1656,1296,986,1428

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