Compilare: main.cpp: In function 'void eraseHash(int)': main.cpp:61:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<table[h].size();++i){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:43:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d",&n, &S); ^ main.cpp:45:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d",&x, &cost[i]); ^