improve 1.pro
improve 1.pro

lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler,lunixbochs/project-euler