Compilare: main.cpp: In function 'int Check(int, int)': main.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<H[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:32: 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:34:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%d" ,&a[i]); ^