Compilare: user.cpp: In function ‘int main()’: user.cpp:26:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (dp[j] != i + 1 && dp[j]!=0) ^ user.cpp:40:46: warning: operation on ‘nr2’ may be undefined [-Wsequence-point] if (nr1 > nr2) nr1 = nr1 + nr2 - (nr2 = nr1); ^ user.cpp:13:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &x); ^