Compilare: user.cpp: In function ‘int main()’: user.cpp:51:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000005]’ [-Wformat=] scanf("%s",&a); ^ user.cpp:52:22: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000005]’ [-Wformat=] scanf("%s\n",&sir); ^ user.cpp:58:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp:49:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:50:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^ user.cpp:51:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&a); ^ user.cpp:52:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",&sir); ^