Compilare: user.cpp: In function ‘int main()’: user.cpp:31:36: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int aux = i | (1 << p1 - 1) | (1 << p2 - 1) | (1 << p3 - 1); ^ user.cpp:31:52: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int aux = i | (1 << p1 - 1) | (1 << p2 - 1) | (1 << p3 - 1); ^ user.cpp:31:68: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int aux = i | (1 << p1 - 1) | (1 << p2 - 1) | (1 << p3 - 1); ^ user.cpp:18:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smin.in", "r", stdin); ^ user.cpp:19:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("smin.out", "w", stdout); ^ user.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:23:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].y); ^