param N := 2;

var x{1..N};

minimize f:
100*(x[2] - x[1]^2)^2 + (1-x[1])^2;

subject to cons1:
x[1]^2 + x[2]^2 - 0.25 >= 0;

data;
var x:=
1	1.2
2	1;

solve;

display x;