Compilare: user.cpp: In function ‘void update(int, char*, int)’: user.cpp:109:9: warning: unused variable ‘k’ [-Wunused-variable] int k = 0; ^ user.cpp: In function ‘void solve()’: user.cpp:142:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c ", &type); ^ user.cpp:143:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(word); ^ user.cpp: In function ‘void read()’: user.cpp:195:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ user.cpp:203:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", word); ^ user.cpp: In function ‘int main()’: user.cpp:210:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp: In function ‘void insert(int, char*)’: user.cpp:186:26: warning: ‘bro’ may be used uninitialized in this function [-Wmaybe-uninitialized] else T[bro].b = N; ^ /tmp/ccB0vgZj.o: In function `solve()': user.cpp:(.text+0x4e2): warning: the `gets' function is dangerous and should not be used.