Compilare: main.cpp: In function 'double dijkstra()': main.cpp:31:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<g[nod].size(); j++){ ~^~~~~~~~~~~~~~ main.cpp:15:21: warning: unused variable 'son' [-Wunused-variable] int i, dist, nod, son, vecin, a, t, j; ^~~ main.cpp: In function 'int main()': main.cpp:49:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ main.cpp:51:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &a, &b, &c); ^