Compilare: main.cpp: In function 'int main()': main.cpp:74:57: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=] fprintf( fout, "%I64d", solve(n, u) - solve(n, l - 1) ); ^ main.cpp:71:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &n, &l, &u ); ^ main.cpp:73:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%u", &v[i] ); ^