foo.cc: In function 'int main()':
foo.cc:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for (int i = 1; i < dp.size(); i++)
      |                     ~~^~~~~~~~~~~
foo.cc:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 2; i < dp.size(); i++)
      |                     ~~^~~~~~~~~~~
foo.cc:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for (int j = 1; j < dp[i].size(); j++)
      |                         ~~^~~~~~~~~~~~~~

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