Compilare: user.cpp: In function ‘int main()’: user.cpp:96:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < G[j - i].size(); k++) { ^ user.cpp:109:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < G[i].size(); j++) { ^ user.cpp:73:21: warning: unused variable ‘v’ [-Wunused-variable] int n, m, q, u, v, c, i, j, k; ^