View Compilation Error

0_0_36865272_25124.cpp: In function 'int main()':
0_0_36865272_25124.cpp:107:38: error: 'G' was not declared in this scope
                     match[i + s] = ++G;
                                      ^
0_0_36865272_25124.cpp:119:37: error: 'G' was not declared in this scope
         for(int i = s * 2 + 1; i <= G; i++){
                                     ^