Compilare: user.cpp: In function ‘int main()’: user.cpp:25:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alge.in", "r", stdin); ^ user.cpp:26:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alge.out", "w", stdout); ^ user.cpp:28:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd", &n, &m); ^ user.cpp:32:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd %hd %hd", &x, &yy, &z); ^ user.cpp:68:26: warning: ‘new_z’ may be used uninitialized in this function [-Wmaybe-uninitialized] while (distt[x][yy][z]) { ^ user.cpp:68:26: warning: ‘new_y’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:68:26: warning: ‘new_x’ may be used uninitialized in this function [-Wmaybe-uninitialized]