Compilare: main.cpp: In function 'int main()': main.cpp:63:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(prec[q[j]].size() < minim) ~~~~~~~~~~~~~~~~~~^~~~~~~ main.cpp:37:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d\n", &n,&m); ^ main.cpp:41:30: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir, 2002, fin); ^ main.cpp:58:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ main.cpp:62:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &q[j]); ^