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HZNUOJ (20):

Solved:

C Course(20):

1927 1928 1929 1930 1931 1945 1949 1951 1952 1953 1958 1959 1964 1965 1968 1975 2001 2003 2008 2016

Tried:

Recommended:

1501 1836 1838 1841 1844 1879 1880 1881 1984 2020 2021 2028 2032 2036 2071 2110 2121 2122 2123 2125 2185 2208 2209 2222 2359