View Compilation Error

0_0_33854806_23218.cpp: In function 'int main()':
0_0_33854806_23218.cpp:25:37: error: 'max' was not declared in this scope
             a[i].l = max(a[i].l,left);
                                     ^
0_0_33854806_23218.cpp:26:38: error: 'min' was not declared in this scope
             a[i].r = min(a[i].r,right);
                                      ^
0_0_33854806_23218.cpp:37:37: error: 'max' was not declared in this scope
             a[i].l = max(a[i].l,left);
                                     ^
0_0_33854806_23218.cpp:38:38: error: 'min' was not declared in this scope
             a[i].r = min(a[i].r,right);
                                      ^