Compilare: user.cpp: In constructor ‘trie::trie()’: user.cpp:12:34: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(t, NULL, sizeof(t)); ^ user.cpp: In function ‘int main()’: user.cpp:52:32: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2005]’ [-Wformat=] fscanf(f, "%s\n", &s[i]); ^ user.cpp:58:30: warning: unused variable ‘mid’ [-Wunused-variable] int r = 2005, l = 1, mid, ret = 0; ^ user.cpp:50:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d\n", &n, &m); ^ user.cpp:52:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s\n", &s[i]); ^ user.cpp:59:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &C); ^ user.cpp:61:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &w[i]), r = min(r, N[w[i]]); ^