View Compilation Error

0_0_32324304_15159.cpp:8:8: error: 'N' was not declared in this scope
 }nodes[N];
        ^
0_0_32324304_15159.cpp:12:1: error: expected unqualified-id before 'for'
 for(int i = 1; i <= n; i ++) {
 ^
0_0_32324304_15159.cpp:12:16: error: 'i' does not name a type
 for(int i = 1; i <= n; i ++) {
                ^
0_0_32324304_15159.cpp:12:24: error: 'i' does not name a type
 for(int i = 1; i <= n; i ++) {
                        ^