Compilare: user.cpp: In function ‘int main()’: user.cpp:47:83: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[lin & 1][i][j][p] = min(dp[lin & 1][i][j][p], dp[1 - lin & 1][l][r][p - (j - i + 1)] + mat[lin][j] - mat[lin][i - 1]); ^ user.cpp:17:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d %d " ,&n,&m,&nr,&cst); ^ user.cpp:20:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&mat[i][j]); ^