Compilare: main.cpp: In function 'int main()': main.cpp:115:30: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long long int' [-Wformat=] fprintf(f, "%I64d\n", ans); ^ main.cpp: In function 'void Read()': main.cpp:22:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &N); ^ main.cpp:25:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", A + i); ^