Compilare: main.cpp: In function 'int main()': main.cpp:74:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<graph[x].size();i++){ ~^~~~~~~~~~~~~~~~ main.cpp:39:18: warning: variable 'dx' set but not used [-Wunused-but-set-variable] long long c, dx, dxy, rsp, cost; ^~ main.cpp:43:38: 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, &m); ^ main.cpp:45:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d ", &a, &b); ^