Compilare: main.cpp: In function 'int main()': main.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<drum.size();i++) ~^~~~~~~~~~~~ main.cpp:46:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:48:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&a,&b); ^