Compilare: main.cpp: In function 'int solve1()': main.cpp:47:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gres[i].size() == nrmuchiigres) ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> solve2()': main.cpp:70:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gres[i].size() + gres[oth].size() == nrmuchiigres){ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int solve1()': main.cpp:49:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'std::pair<int, int> solve2()': main.cpp:84:1: warning: control reaches end of non-void function [-Wreturn-type] } ^