Compilare: user.cpp: In function ‘double Min(int, int)’: user.cpp:66:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < A.size(); i++) ^ user.cpp:68:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j+1 < B.size() && B[j+1].y>A[i].y) ^ user.cpp:79:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j+1 < B.size() && abs(B[j+1].y-A[i].y) < mn) ^ user.cpp: In function ‘int main()’: user.cpp:93:33: 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); ^ user.cpp:94:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:96:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf", &v[i].x, &v[i].y); ^