Compilare: user.cpp: In function ‘int main()’: user.cpp:14:33: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘long int*’ [-Wformat=] scanf("%d%d%d\n", &n, &m, &l); ^ user.cpp:14:33: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] user.cpp:14:33: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘long int*’ [-Wformat=] user.cpp:33:31: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’ [-Wformat=] printf("%d\n", sol[nr]); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dinti.in", "r", stdin); ^ user.cpp:13:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dinti.out", "w", stdout); ^ user.cpp:14:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n", &n, &m, &l); ^ user.cpp:16:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(cf+1); ^ user.cpp:30:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(cf); ^ /tmp/ccZ12SPJ.o: In function `main': user.cpp:(.text.startup+0x8f): warning: the `gets' function is dangerous and should not be used.