Compilare: main.cpp: In function 'int main()': main.cpp:71:32: warning: use of 'll' length modifier with 'f' type character has either no effect or undefined behavior [-Wformat=] printf("%llf",sqrtl(dei(0,n))); ^ main.cpp:65:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.in","r",stdin); ^ main.cpp:66:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.out","w",stdout); ^ main.cpp:67:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:69:35: 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); ^