N=10;
M=10;
height=[|517,626,565,502,512,551,622,557,518,621|
515,498,463,456,507,504,452,598,450,454|
432,537,522,410,504,403,412,418,432,541|
477,462,397,492,385,375,436,355,467,478|
356,417,345,307,313,342,317,335,304,365|
334,395,274,364,344,314,307,329,334,264|
240,209,233,223,243,241,254,270,240,257|
182,228,282,195,204,152,268,258,279,232|
205,232,198,142,167,195,106,226,212,246|
85,189,159,84,161,109,150,130,183,51|];