Compilare: user.cpp: In function ‘int main()’: user.cpp:61:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<Points.size()-1; i++) ^ user.cpp:26:9: warning: unused variable ‘x’ [-Wunused-variable] int x, y, n, l; ^ user.cpp:26:12: warning: unused variable ‘y’ [-Wunused-variable] int x, y, n, l; ^ user.cpp:24:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.in", "r", stdin); ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.out", "w", stdout); ^ user.cpp:28:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &start.first, &start.second, &n, &l); ^ user.cpp:34:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dir[i]); ^ user.cpp:59:25: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d\n", lg-nr); ^ user.cpp:59:25: warning: ‘lg’ may be used uninitialized in this function [-Wmaybe-uninitialized]