n=50;
a=[657,83,80,81,86,60,84,85,63,64,61,335,13,14,6,7,6,7,6,7,6,7,6,17,17,17,17,17,135,136,130,131,108,109,134,135,112,113,138,139,90,91,94,95,94,95,98,99,98,99];