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typedef array<double, 2> P;
double func(P p);
pair<double, P> hillClimb(P start) {
    pair<double, P> cur(func(start), start);
    for (double jmp = 1e9; jmp > 1e-20; jmp /= 2) {
        rep(j,0,100) rep(dx,-1,2) rep(dy,-1,2) {
            P p = cur.second;
            p[0] += dx*jmp;
            p[1] += dy*jmp;
            cur = min(cur, make_pair(func(p), p));
        }
    }
    return cur;
}
 

prog.cpp:1:9: error: ‘array’ does not name a type
 typedef array<double, 2> P;
         ^~~~~
prog.cpp:2:13: error: ‘P’ was not declared in this scope
 double func(P p);
             ^
prog.cpp:3:1: error: ‘pair’ does not name a type
 pair<double, P> hillClimb(P start) {
 ^~~~

Standard output is empty