Compilare: main.cpp: In function 'int main()': main.cpp:122:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[nod.second].size();i++){ ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:41:12: warning: unused variable 'j' [-Wunused-variable] int i, j, nrmuchii, n, t, in, sf, sum, muchiie, e, nr_total_de_e, x, y, cost_e, nr_muchii_adaugate_e=0; ^ main.cpp:49:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d", &t, &n, &nrmuchii); ^ main.cpp:53:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &in, &sf); ^ main.cpp:54:53: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c%c%c%c%c", &c, &c1, &c2, &c3, &c4); ^ main.cpp:148:22: warning: 'nr_total_de_e' may be used uninitialized in this function [-Wmaybe-uninitialized] nr_total_de_e+=ninja[i].nr_de_e; ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:74:14: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized] sum+=20; ^~