process.stdin.resume(); process.stdin.setEncoding('ascii'); var input_stdin = ""; var input_stdin_array = ""; var input_currentline = 0; process.stdin.on('data', function (data) { input_stdin += data; }); process.stdin.on('end', function () { input_stdin_array = input_stdin.split("\n"); main(); }); function readLine() { return input_stdin_array[input_currentline++]; } /////////////// ignore above this line //////////////////// function main() { var n = parseInt(readLine()); a = readLine().split(' '); a = a.map(Number); a = a.sort(); var diffArr = []; for (var i = 1; i < n; i++) { diffArr.push(Math.abs(a[i] - a[i-1])); } console.log(Math.min.apply(null, diffArr)); }