Compilare: user.cpp: In function ‘int getNum(int&)’: user.cpp:16:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (ind < strlen(s) && isNum(s[ind])) ^ user.cpp: In function ‘void solve2(int, int, int, int)’: user.cpp:62:13: warning: unused variable ‘nr’ [-Wunused-variable] int nr = getNum(ind); ^ user.cpp: In function ‘int main()’: user.cpp:92:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.in", "r", stdin); ^ user.cpp:93:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compresie.out", "w", stdout); ^ user.cpp:97:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccV1dDkB.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.