Compilare: main.cpp: In function 'int main()': main.cpp:13:51: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d", (n-a+1)*1LL*(n-a+2)/2%mod); ^ main.cpp:15:87: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d", ((n-a+1)*1LL*(n-a+2)/2%mod+(n-2*a+1)*1LL*(n-2*a+2)/2%mod)%mod); ^ main.cpp:7:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("echilateral.in", "r", stdin); ^ main.cpp:8:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("echilateral.out", "w", stdout); ^ main.cpp:10:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &a, &b); ^