当士兵走到 ri(1≤ri≤2⋅105)r_i(1 \leq r_i \leq 2\cdot10^5)ri(1≤ri≤2⋅105) 时
应改为:
当你走到 ri(1≤ri≤2⋅105)r_i(1 \leq r_i \leq 2\cdot10^5)ri(1≤ri≤2⋅105) 时