Compilare: user.cpp: In function ‘int IsInArray(int)’: user.cpp:13:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v1 < x && x <= v2) ^ user.cpp:13:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v1 < x && x <= v2) ^ user.cpp:12:21: warning: unused variable ‘v3’ [-Wunused-variable] unsigned long long v3 = v2+i; ^ user.cpp: In function ‘int main()’: user.cpp:51:13: warning: unused variable ‘begin’ [-Wunused-variable] clock_t begin = clock(); ^ user.cpp:56:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^ user.cpp:60:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &r); ^