Compilare: user.cpp: In function ‘int add(int, int, int, int)’: user.cpp:24:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:37:39: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] memcpy(dp[i & 1][j], dp[1 - i & 1][j], sizeof(dp[1 - i & 1][j])); ^ user.cpp:37:64: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] memcpy(dp[i & 1][j], dp[1 - i & 1][j], sizeof(dp[1 - i & 1][j])); ^ user.cpp:38:35: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dig[i & 1][j] = dig[1 - i & 1][j]; ^ user.cpp:42:29: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] add(i & 1, r, 1 - i & 1, j); ^ user.cpp:31:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&k); ^ user.cpp:35:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&x); ^