Create 1698.cpp

HDOJ/1698.cpp

@@ -0,0 +1,105 @@
+/// General includes
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+
+#include <algorithm>
+using namespace std;
+
+/// 延迟更新: 区间赋值更新, 区间运算(求和)
+namespace AttributeSegmentTree
+{
+
+const int MAXN = 100100;
+const int MAXTREENODE = MAXN << 2;
+const int ATTR_BY_DEFAULT=1;///默认初始化属性
+
+struct node
+{
+    int lt,rt;
+    int attr;
+};
+
+node tree[MAXTREENODE];
+
+void build(int L,int R,int _indexer=1)
+{
+    tree[_indexer].lt=L;
+    tree[_indexer].rt=R;
+    tree[_indexer].attr=ATTR_BY_DEFAULT;
+    if(L!=R)
+    {
+        int mid=(L+R)>>1;
+        build(L,mid,_indexer<<1);
+        build(mid+1,R,_indexer<<1|1);
+    }
+}
+
+void update(int L,int R,int NewAttr,int _indexer=1)
+{
+    if(tree[_indexer].attr==NewAttr) return; /// Same Attribute. Don't Need Change.
+    if(tree[_indexer].lt==L&&tree[_indexer].rt==R)
+    {
+        /// Right this segment. Update.
+        tree[_indexer].attr=NewAttr;
+        return;
+    }
+    /// This segment has only 1 attribute. New attribute is different.
+    /// So change this segment's manager's attribute to -1 ( Different Attribute in this segment )
+    if(tree[_indexer].attr!=-1)
+    {
+        tree[_indexer<<1].attr=tree[_indexer<<1|1].attr=tree[_indexer].attr;
+        tree[_indexer].attr=-1;
+    }
+    /// If This segment has already had several attributes, operate its subtree by Deep-Loop.
+    int mid=(tree[_indexer].lt+tree[_indexer].rt)>>1;
+    if(L>mid)
+    {
+        update(L,R,NewAttr,_indexer<<1|1);
+    }
+    else if(R<=mid)
+    {
+        update(L,R,NewAttr,_indexer<<1);
+    }
+    else
+    {
+        update(L,mid,NewAttr,_indexer<<1);
+        update(mid+1,R,NewAttr,_indexer<<1|1);
+    }
+}
+
+#define ValueOfAttr(Attr) (Attr)
+int AttrSumUp(int _indexer=1)
+{
+    if(tree[_indexer].attr!=-1)
+    {
+        return ValueOfAttr(tree[_indexer].attr)*(tree[_indexer].rt-tree[_indexer].lt+1);
+    }
+    else
+    {
+        return AttrSumUp(_indexer<<1)+AttrSumUp(_indexer<<1|1);
+    }
+}
+
+int main()
+{
+    int t;
+    scanf("%d",&t);
+    for(int ct=1;ct<=t;ct++)
+    {
+        int n;
+        scanf("%d",&n);
+        AttributeSegmentTree::build(1,n);
+        int q;
+        scanf("%d",&q);
+        for(int i=0;i<q;i++)
+        {
+            int l,r,v;
+            scanf("%d %d %d",&l,&r,&v);
+            AttributeSegmentTree::update(l,r,v);
+        }
+        printf("Case %d: The total value of the hook is %d.\n",ct,AttributeSegmentTree::AttrSumUp());
+    }
+
+    return 0;
+}