Compilare: main.cpp: In function 'int main()': main.cpp:21:30: warning: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'ulint {aka long long unsigned int}' [-Wformat=] printf("%I64u", a + b - 1); ^ main.cpp:13:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("flori4.in", "r", stdin); ^ main.cpp:14:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("flori4.out", "w", stdout); ^ main.cpp:16:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^