40        1122        1711    20160326
 169         700         950    20160326
  40        1630        1711    20160326
 182         700         950    20160327
  40        1029        1711    20160327
 169         700         950    20160327
  40        1630        1711    20160327
 122         700         950    20160328
  40        1630        1711    20160328
 169         700         950    20160328
  40        1630        1711    20160328
3049         700         950    20160331
  40        1630        1711    20160331
3049         700         950    20160331
  40        1630        1711    20160331
 169         700         950    20160401
  40        1630        1711    20160401
 169         700         950    20160401
  40        1630        1711    20160401

169         700         950    20160326
 182         700         950    20160327
 169         700         950    20160328
3049         700         950    20160331

idx1 = find([1;diff(A(:,4))]);
idx2 = find([diff(A(:,4));1]);
B = zeros(length(idx1),4);
for ii = 1:length(idx1)
    row_number = find(A(idx1(ii):idx2(ii),1) == max(A(idx1(ii):idx2(ii),1)),1);
    B(ii,:) = A(idx1(ii)+row_number-1,:);
end