Compilare: user.cpp:1:9: warning: #pragma once in main file #pragma once ^~~~ user.cpp: In function ‘int main()’: user.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<dp.size(); i++) ~^~~~~~~~~~ user.cpp:63:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~