Compilare: user.cpp: In function ‘int main()’: user.cpp:19:65: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (subs[i].x>subs[j].x || subs[i].x==subs[j].x && subs[i].y<subs[j].y) ^ user.cpp:11:12: warning: unused variable ‘x’ [-Wunused-variable] int n, x,y,frig=0,k=1; ^ user.cpp:11:14: warning: unused variable ‘y’ [-Wunused-variable] int n, x,y,frig=0,k=1; ^ user.cpp:11:16: warning: unused variable ‘frig’ [-Wunused-variable] int n, x,y,frig=0,k=1; ^ user.cpp:9:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.in", "r",stdin); ^ user.cpp:10:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reactivi.out","w",stdout); ^ user.cpp:12:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n ); ^ user.cpp:15:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &subs[w].x, &subs[w].y); ^