Compilare: main.cpp: In function 'int main()': main.cpp:88:39: warning: use of 'll' length modifier with 'f' type character has either no effect or undefined behavior [-Wformat=] fprintf(fout, "%.8llf", solve(1,n)); ^ main.cpp:82:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ main.cpp:84:54: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &v[i].first,&v[i].second); ^