palc.cpp: In function 'bool verif(std::deque<int, std::allocator<int> >)': palc.cpp:11: warning: comparison between signed and unsigned integer expressions palc.cpp: In function 'int main()': palc.cpp:22: warning: unused variable 'l' palc.cpp:22: warning: 'x' may be used uninitialized in this function palc.cpp:22: warning: 'y' may be used uninitialized in this function