foo.cc: In function 'void DP()':
foo.cc:70:57: error: expected ')' before ';' token
   70 |                 f[i][k]=max(f[i][k],f[j][k-1]+a[j+1][i]);
      |                                                         ^
      |                                                         )
foo.cc:69:16: note: to match this '('
   69 |             for(int j=k-1;j<=i-1;
      |                ^

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