Compilare: main.cpp: In function 'long long int calcul()': main.cpp:22:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < v[i].size() ; j++){ ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:86:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&q); ^ main.cpp:88:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^ main.cpp:97:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&tip,&x,&y); ^