Compilare: main.cpp: In function 'int main()': main.cpp:32:11: warning: unused variable 'n' [-Wunused-variable] int m,n,i; ^ main.cpp:30:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.in","r",stdin); ^ main.cpp:31:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.out","w",stdout); ^ main.cpp:33:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m); ^ main.cpp:36:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&a[i].x,&a[i].y,&a[i].r); ^