You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: fofuf.m
    path of file: ./repos/Algorithms_MathModels/GraphTheory(图论)/detailed/网络流
    
    the code of the file until where you have to start completion: function [f wf No] = fofuf(C,f1)
% C表示弧上的容量
% f1表示弧上现在的流量
% f表示最大流

    
function [f wf No] = fofuf(C,f1)
% C表示弧上的容量
% f1表示弧上现在的流量
% f表示最大流
% wf表示最大流量
% No标号函数，由此可得到最小割
% 注：待求最大流的源为第一个顶点，汇为最后一个顶点

n = length(C);
if nargin == 1
    f = zeros(n,n);
else
    f = f1;
end