/in/foo.cc: In function 'void backtrack(std::vector<IndexedValue>&, std::vector<IndexedValue>&, int, std::vector<std::vector<IndexedValue> >&)':
/in/foo.cc:19:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = start; i < nums.size(); i++) {
                         ~~^~~~~~~~~~~~~
/in/foo.cc: In function 'std::vector<std::vector<IndexedValue> > findIncreasingSubsequences(std::vector<int>&)':
/in/foo.cc:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < nums.size(); i++) {
                     ~~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0;i<result.size();i++) {
                  ~^~~~~~~~~~~~~~