Compilare: main.cpp: In function 'int main()': main.cpp:27:31: warning: unused variable 'j' [-Wunused-variable] int pmax = 1, j = 0; ^ main.cpp:11:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("invcs.in", "r", stdin); ^ main.cpp:12:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("invcs.out", "w", stdout); ^