Compilare: user.cpp: In function ‘void solve()’: user.cpp:32:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[pos++] = s[i++] ; ^ user.cpp:33:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[pos] = 0 ; ^ user.cpp:17:29: warning: unused variable ‘pr’ [-Wunused-variable] int x = strlen(s) - 1 , pr = 0 ; ^ user.cpp: In function ‘int main()’: user.cpp:74:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "reteta2.in" , "r" , stdin ) ; ^ user.cpp:75:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "reteta2.out" , "w" , stdout ) ; ^ user.cpp:76:33: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets( s , lenght , stdin ) ; ^