pluricex.cpp: In function 'bool solutie(int)': pluricex.cpp:33: warning: comparison between signed and unsigned integer expressions pluricex.cpp: In function 'void bk(int)': pluricex.cpp:61: warning: suggest explicit braces to avoid ambiguous 'else' pluricex.cpp: In function 'int main()': pluricex.cpp:92: warning: comparison between signed and unsigned integer expressions