add quadratic complexity tests
add quadratic complexity tests

ruchevits/solidity,debris/solidity,ruchevits/solidity,gluk256/solidity,chriseth/solidity,chriseth/solidity-doc-test,vaporry/solidity,ethers/solidity,ruchevits/solidity,douglas-larocca/solidity,ruchevits/solidity,shahankhatch/solidity,arkpar/solidity,LianaHus/solidity