# your code goes here
inp = [[12,2,9,10],[3,0,9,29],[15,6,-32,1]];
n = len(inp[0]);
m = len(inp);
maxVal = max(inp[0]);
for i in inp:
print(i)
if(maxVal < max(i)):
maxVal = max(i)
print(maxVal);
inp[0][0] = maxVal;
inp[0][n-1] = maxVal;
inp[m-1][0] = maxVal;
inp[m-1][n-1] = maxVal;
print(inp);
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCmlucCA9IFtbMTIsMiw5LDEwXSxbMywwLDksMjldLFsxNSw2LC0zMiwxXV07Cm4gPSBsZW4oaW5wWzBdKTsKbSA9IGxlbihpbnApOwptYXhWYWwgPSBtYXgoaW5wWzBdKTsKZm9yIGkgaW4gaW5wOgoJcHJpbnQoaSkKCWlmKG1heFZhbCA8IG1heChpKSk6CgkJbWF4VmFsID0gbWF4KGkpCnByaW50KG1heFZhbCk7CgkKaW5wWzBdWzBdID0gbWF4VmFsOwppbnBbMF1bbi0xXSA9IG1heFZhbDsKaW5wW20tMV1bMF0gPSBtYXhWYWw7CmlucFttLTFdW24tMV0gPSBtYXhWYWw7CnByaW50KGlucCk7Cg==
[12, 2, 9, 10]
[3, 0, 9, 29]
[15, 6, -32, 1]
29
[[29, 2, 9, 29], [3, 0, 9, 29], [29, 6, -32, 29]]