0_0_11423561_10850.cpp: In function `void solve()':
0_0_11423561_10850.cpp:15: error: `UI' undeclared (first use this function)
0_0_11423561_10850.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11423561_10850.cpp:15: error: expected `;' before "j"
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