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vector<vector<int>> mul(vector<vector<int>> a,vector<vector<int>> b)
{
     int n = a.size();
     vector<vector<int>> ans;
     ans.resize(n);
     for(int i=0;i<n;i++)
     {
          ans[i].resize(n);
          for(int j=0;j<n;j++)
          {
               ans[i][j]=0;
          }
     }
     for(int i=0;i<n;i++)
     {
          for(int j=0;j<n;j++)
          {
               for(int k=0;k<n;k++)
               {
                    ans[i][j] += (a[i][k]*b[k][j])%mod;
                    ans[i][j]%=mod;
               }
          }
     }
     return ans;
}
 
vector<vector<int>> exp(vector<vector<int>> x,int num)
{
     if(num==1)
          return x;
     int see = num/2;
     vector<vector<int>> y = exp(x,see);
     y = mul(y,y);
     if(num%2==1)
     {
          y = mul(y,x);
     }
     return y;
}
 

Main.java:1: error: class, interface, or enum expected
vector<vector<int>> mul(vector<vector<int>> a,vector<vector<int>> b)
^
Main.java:4: error: class, interface, or enum expected
     vector<vector<int>> ans;
     ^
Main.java:5: error: class, interface, or enum expected
     ans.resize(n);
     ^
Main.java:6: error: class, interface, or enum expected
     for(int i=0;i<n;i++)
     ^
Main.java:6: error: class, interface, or enum expected
     for(int i=0;i<n;i++)
                 ^
Main.java:6: error: class, interface, or enum expected
     for(int i=0;i<n;i++)
                     ^
Main.java:9: error: class, interface, or enum expected
          for(int j=0;j<n;j++)
          ^
Main.java:9: error: class, interface, or enum expected
          for(int j=0;j<n;j++)
                      ^
Main.java:9: error: class, interface, or enum expected
          for(int j=0;j<n;j++)
                          ^
Main.java:12: error: class, interface, or enum expected
          }
          ^
Main.java:14: error: class, interface, or enum expected
     for(int i=0;i<n;i++)
                 ^
Main.java:14: error: class, interface, or enum expected
     for(int i=0;i<n;i++)
                     ^
Main.java:16: error: class, interface, or enum expected
          for(int j=0;j<n;j++)
                      ^
Main.java:16: error: class, interface, or enum expected
          for(int j=0;j<n;j++)
                          ^
Main.java:18: error: class, interface, or enum expected
               for(int k=0;k<n;k++)
                           ^
Main.java:18: error: class, interface, or enum expected
               for(int k=0;k<n;k++)
                               ^
Main.java:21: error: class, interface, or enum expected
                    ans[i][j]%=mod;
                    ^
Main.java:22: error: class, interface, or enum expected
               }
               ^
Main.java:26: error: class, interface, or enum expected
}
^
Main.java:32: error: class, interface, or enum expected
     int see = num/2;
     ^
Main.java:33: error: class, interface, or enum expected
     vector<vector<int>> y = exp(x,see);
     ^
Main.java:34: error: class, interface, or enum expected
     y = mul(y,y);
     ^
Main.java:35: error: class, interface, or enum expected
     if(num%2==1)
     ^
Main.java:38: error: class, interface, or enum expected
     }
     ^
Main.java:40: error: class, interface, or enum expected
}
^
25 errors

Standard output is empty