Compilare: user.cpp: In function ‘void precalcDP()’: user.cpp:49:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[N + 1].size(); i++) ^ user.cpp:61:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < G[i].size(); k++) ^ user.cpp: In function ‘void findSol(int, long long int)’: user.cpp:86:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < GG[start].size(); k++) ^ user.cpp:85:13: warning: unused variable ‘j’ [-Wunused-variable] int j = start; ^