View Compilation Error

0_0_2945982_10976.cpp: In function `void clear_repeat()':
0_0_2945982_10976.cpp:84: error: `i' undeclared (first use this function)
0_0_2945982_10976.cpp:84: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2945982_10976.cpp: In function `void solve(int)':
0_0_2945982_10976.cpp:106: error: `memset' undeclared (first use this function)