Compilare: user.cpp: In function ‘void write()’: user.cpp:74:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); ++ i){ ^ user.cpp: In function ‘int main()’: user.cpp:82:18: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(pattern); ^ user.cpp:84:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(text); ^ /tmp/ccw8EMGg.o: In function `main': user.cpp:(.text.startup+0x19): warning: the `gets' function is dangerous and should not be used.