View Compilation Error

0_0_30787018_17494.cpp: In function 'int main()':
0_0_30787018_17494.cpp:8:24: error: 'max' was not declared in this scope
     int maxn = max(n, m);
                        ^
0_0_30787018_17494.cpp:9:24: error: 'min' was not declared in this scope
     int minn = min(n, m);
                        ^