Compilare: main.cpp: In function 'int main()': main.cpp:29:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=r*c and sol.size()<r+c-1;++i) ~~~~~~~~~~^~~~~~ main.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<p.size()) ~~~^~~~~~~~~ main.cpp:40:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind==p.size()) continue; ~~~^~~~~~~~~~ main.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();++i) ~^~~~~~~~~~~