Compilare: main.cpp: In function 'double sol(std::vector<punct>, int, int)': main.cpp:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<=pct_closest.size()-7-1; i++) ~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:73:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<pct_closest.size(); j++) ~^~~~~~~~~~~~~~~~~~~ main.cpp:58:9: warning: unused variable 'ct' [-Wunused-variable] int ct=0; ^~