凸包 (共6题)
ID Problem Title Source AC Ratio Solved Tries
2877 Building the Moat 护城河的挖掘 USACO 2006 Oct Gold 0% 0 0
2930 Beauty Contest USACO 2003 Fall Green 25% 1 4
3391 阴影(shadow) HE 100% 2 2
4641 保镖(guard) ZJOI2018 100% 1 1
4668 田野(fields) CTS2019, CTSC2019 100% 1 1