Compilare: main.cpp: In function 'int read()': main.cpp:33:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:67:26: warning: variable 'leng' set but not used [-Wunused-but-set-variable] int lengmax = 0, leng, ans = 0, cnt; ^~~~ main.cpp:67:41: warning: unused variable 'cnt' [-Wunused-variable] int lengmax = 0, leng, ans = 0, cnt; ^~~ main.cpp: In function 'int read()': main.cpp:29:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, 1, MAX, stdin); ^ main.cpp: In function 'void Read(int&)': main.cpp:19:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, stdin), pos = 0; ^ main.cpp:24:45: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, stdin), pos = 0; ^ main.cpp: In function 'int main()': main.cpp:37:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cool.in", "r", stdin); ^ main.cpp:38:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cool.out", "w", stdout); ^