# YZOJ P3392 越野赛车问题

• ### 数据范围

 数据点 $$n$$ $$m$$ 约定 1 $$=5$$ $$5$$ – 2 $$=20$$ $$20$$ 3 $$=50000$$ $$=50000$$ $$l_i = 1, u_i = i, v_i = i +1$$ 4 $$=70000$$ $$=70000$$ 5 $$=50000$$ $$=50000$$ $$u_i = i, v_i = i +1$$ 6 $$=70000$$ $$=70000$$ 7 $$=50000$$ $$=50000$$ $$l_i = 1$$ 8 $$=70000$$ $$=70000$$ 9 $$=50000$$ $$=50000$$ – 10 $$=70000$$ $$=70000$$