Compilare: user.cpp: In function ‘int main()’: user.cpp:21:37: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = dp[1 - i & 1][j - 1] + 1; ~~^~~ user.cpp:12:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d ",&n, &m); ^ user.cpp:13:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%s %s ",a + 1, b + 1); ^