1916 Sequence Searching 27% (8/30)
1917 Double Cola 0% (0/0)
1918 Photo   50% (1/2)
1919 Yin and Yang   0% (0/0)
1920 Figure Eight   0% (0/0)
1921 Seinfeld 0% (0/0)
1922 Tiles of Tetris, NOT! 0% (0/0)
1923 Not So Flat After All 0% (0/0)
1924 Probability One 100% (1/1)
1925 Hop — Don’t Walk! 0% (0/0)
1926 Air Strike 0% (0/0)
1927 Stock Chase 100% (1/1)
1928 Land Division 0% (0/0)
1929 Kind of a Blur 0% (0/0)
1930 National Treasures 0% (0/0)
1931 Judging Olympia 0% (0/0)
1932 Hide That Number 0% (0/0)
1933 Rotating Rings 0% (0/0)
1934 A Tale from the Dark Side of the Moon 0% (0/0)
1935 Fermat's Christmas Theorem 0% (0/0)
1936 Incidental Points 0% (0/0)
1937 Let's Go to the Movies 0% (0/0)
1938 The Writers' Club 0% (0/0)
1939 Tire Dimensions 0% (0/0)
1940 Random Walk 0% (0/0)
1941 Paint Mix 0% (0/0)
1942 Open and Close 0% (0/0)
1943 Smallest Difference 0% (0/0)
1944 Last Digits 0% (0/0)
1945 Suit Distribution 0% (0/0)
1946 Bridge Bidding 0% (0/0)
1947 Baskets of Gold Coins   0% (0/0)
1949 Human Knot   0% (0/0)
1951 Doors and Penguins   0% (0/0)
1952 Knots   0% (0/0)
1954 Shortest Prefixes 0% (0/0)
1955 Squares 0% (0/0)
1956 Hire and Fire 0% (0/0)
1958 Blackjack 0% (0/0)
1959 Litmus Test 0% (0/0)
1960 Scrambled Polygon 0% (0/0)
1961 Spin   0% (0/0)
1962 Shake 0% (0/0)
1963 Toys 0% (0/0)
1964 Compress 0% (0/0)
1965 Sheet 0% (0/0)
1966 Gym 0% (0/0)
1968 Perms 0% (0/0)
1969 Tree Grafting   67% (2/3)
1970 Look and Say   100% (2/2)
1971 Server Relocation   100% (1/1)
1972 Coin Toss   100% (1/1)
1973 Vacation Rentals   100% (1/1)
1974 Baseball   100% (1/1)
1975 Team Work   100% (1/1)
1976 Wavelet Compression   100% (1/1)
1977 Elementary Additions   100% (2/2)
1978 Hanafuda Shuffle 100% (1/1)
1979 Red and Black 76% (16/21) Easier
1980 Unit Fraction Partition 0% (0/0)
1981 Circle and Points 0% (0/0)
1982 Water Tank 0% (0/0)
1983 Name the Crossing 0% (0/0)
1984 Savings Account   88% (7/8) Beginner
1985 Pascal's Travels 0% (0/0)
1986 Overflowing Bookshelf 0% (0/0)
1987 Connect 0% (0/0)
1988 Copier Reduction 0% (0/0)
1989 Time to Graduate 0% (0/0)
1990 Painter 0% (0/0)
1991 Consecutive Digits 0% (0/0)
1992 Leapin' Lizards 0% (0/0)
1993 Netiquette 0% (0/0)
1994 Combination Lock 0% (0/0)
1995 Lawrence of Arabia 0% (0/0)
1996 Close Enough Computations 0% (0/0)
1997 Walk in the Park 0% (0/0)
1998 Dance 0% (0/0)
1999 Trucking 25% (2/8)


North University of China

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NUC

NOJ

OJ

ACM/ICPC