View Compilation Error

0_0_11577897_11181.cpp: In function `void solve()':
0_0_11577897_11181.cpp:98: error: `w' undeclared (first use this function)
0_0_11577897_11181.cpp:98: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11577897_11181.cpp:100: error: expected primary-expression before ';' token