Compilare: main.cpp: In function 'int main()': main.cpp:107:92: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d", (1LL * ((1LL * (frq[a] - 1) * (frq[a] - 2)) / 2) * (frq[b] - 1)) % mod); ^ main.cpp:90:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:95:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^