Compilare: user.cpp: In function ‘int main()’: user.cpp:143:46: warning: suggest parentheses around comparison in operand of ‘|’ [-Wparentheses] if(a<1 || a>n || b<1 || b>m | elim[a][b]) continue; ^ user.cpp:167:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp:175:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^