View Compilation Error

0_0_6724183_18470.cpp:15: error: expected constructor, destructor, or type conversion before '<' token
0_0_6724183_18470.cpp:15: error: expected `,' or `;' before '<' token
0_0_6724183_18470.cpp: In function `void init()':
0_0_6724183_18470.cpp:27: error: `G' undeclared (first use this function)
0_0_6724183_18470.cpp:27: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6724183_18470.cpp: In function `bool find(int)':
0_0_6724183_18470.cpp:33: error: `G' undeclared (first use this function)
0_0_6724183_18470.cpp: In function `int main()':
0_0_6724183_18470.cpp:70: error: `G' undeclared (first use this function)