Compilare: user.cpp: In function ‘int main()’: user.cpp:59:25: warning: unused variable ‘k1’ [-Wunused-variable] int k1 = *it1; ^ user.cpp:60:25: warning: unused variable ‘k2’ [-Wunused-variable] int k2 = *it2; ^ user.cpp:23:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.in", "r", stdin); ^ user.cpp:24:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numere6.out", "w", stdout); ^ user.cpp:26:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^