Compilare: user.cpp: In function ‘bool cmp(cerc, cerc)’: user.cpp:31:47: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] return B.m - A.m > 0.0000001 || B.m == A.m && B.x > A.x; ^ user.cpp: In function ‘void solve()’: user.cpp:47:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < a.size(); ++i){ ^ user.cpp: In function ‘void read()’: user.cpp:21:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:23:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &aux.x, &aux.y, &aux.r); ^ user.cpp: In function ‘int main()’: user.cpp:94:35: 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); ^ user.cpp:95:37: 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); ^