View Compilation Error

0_0_16651370_23875.cpp:8:24: error: 'N' was not declared in this scope
 treasure_node treasure[N];  
                        ^
0_0_16651370_23875.cpp: In function 'int main(int, char**)':
0_0_16651370_23875.cpp:21:18: error: 'treasure' was not declared in this scope
    scanf("%d%d",&treasure[i].pi,&treasure[i].mi); 
                  ^
0_0_16651370_23875.cpp:23:8: error: 'treasure' was not declared in this scope
   sort(treasure,treasure+n,cmp);
        ^
0_0_16651370_23875.cpp:23:31: error: 'sort' was not declared in this scope
   sort(treasure,treasure+n,cmp);
                               ^