Compilare: user.cpp: In function ‘int main()’: user.cpp:10:9: warning: unused variable ‘n’ [-Wunused-variable] int n, i, m, cnt = 0; ^ user.cpp:10:15: warning: unused variable ‘m’ [-Wunused-variable] int n, i, m, cnt = 0; ^ user.cpp:7:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("palalila2.in", "r", stdin); ^ user.cpp:8:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("palalila2.out", "w", stdout); ^ user.cpp:11:13: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets (s); ^ /tmp/ccyy3dUW.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.