Compilare: user.cpp: In function ‘void solve(std::vector<int>)’: user.cpp:137:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < v.size() - 1; i++) ^ user.cpp: In function ‘int main()’: user.cpp:183:45: warning: second operand of conditional expression has no effect [-Wunused-value] fout << sol << ' ' << cnt == 0 ? 1 : cnt; ^ user.cpp:183:45: warning: third operand of conditional expression has no effect [-Wunused-value]