Compilare: main.cpp: In function 'long long int secv(long long int, long long int, long long int)': main.cpp:11:29: warning: variable 'lg' set but not used [-Wunused-but-set-variable] long long mn, mx, ans , lg; ^~ main.cpp: In function 'int main()': main.cpp:22:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cntsubsirmax.in", "r", stdin); ^ main.cpp:23:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cntsubsirmax.out", "w", stdout); ^ main.cpp:26:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s" , (s + 1)); ^