Update segment_tree_v2.cpp

Changes

1 changed files (+1/-1)

• Data Structures/segment_tree_v2.cpp
  • @@ -67,7 +67,7 @@ public:
    } T query(int a, int b, int l = 0, int r = -1, int n = 1) { if (r == -1) r = N - 1; - if (l > b || r < a) return 0; + if (a > b || l > b || r < a) return 0; push(l, r, n); if (l >= a && r <= b) return seg[n]; int m = (l + r) >> 1;