foo.cc: In function 'int main()':
foo.cc:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int j=0;j<state.size();j++){
~^~~~~~~~~~~~~
foo.cc:55:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int k=0;k<state.size();k++){
~^~~~~~~~~~~~~
foo.cc:68:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<state.size();i++)
~^~~~~~~~~~~~~
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