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 solve1()’: user.cpp:23:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(s); i++) ^ user.cpp: In function ‘int main()’: user.cpp:35:40: 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:36:42: 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:38:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, MAXN, stdin); ^