Create 1698_chendl111.cpp

From http://acm.hdu.edu.cn/discuss/problem/post/reply.php?postid=28786&messageid=1&deep=0

HDOJ/1698_chendl111.cpp

@@ -0,0 +1,59 @@
+#include<cstdio> 
+#include<algorithm>
+#include<iostream>
+using namespace std;
+#define lchild rt << 1, l, m
+#define rchild rt << 1 | 1, m + 1, r
+const int N=400010;
+int tree[N],lazy[N],t,ans=1,L,R,delta,n,m;
+
+//区间求和 
+void push_up(int rt){
+	tree[rt]=tree[rt << 1]+tree[rt << 1 | 1];
+}
+
+void push_down(int rt, int len) {
+	if(lazy[rt])
+	{
+		lazy[rt << 1]=lazy[rt << 1 | 1] = lazy[rt];
+    	tree[rt << 1] = lazy[rt << 1] * (len - (len >> 1));
+    	tree[rt << 1 | 1] = lazy[rt << 1 | 1] * (len >> 1);
+    	lazy[rt] = 0;
+	}	
+}
+
+void build(int rt = 1, int l = 1, int r = n) {
+	lazy[rt]=0;
+    if (l == r) { tree[rt]=1; return; }//注意对树的初始赋值 
+    int m = (l + r) >> 1;
+    build(lchild); build(rchild);
+    push_up(rt);
+}
+
+void update(int L, int R, int delta, int rt = 1, int l = 1, int r = n) {
+    if (L <= l && r <= R) {
+        tree[rt] = delta * (r - l + 1);//数据更新 
+        lazy[rt] = delta;
+        return;
+    }
+    push_down(rt, r - l + 1);
+    int m = (l + r) >> 1;
+    if (L <= m) update(L, R, delta, lchild);
+    if (R > m)  update(L, R, delta, rchild);
+    push_up(rt);
+}
+
+int main()
+{
+	for(scanf("%d",&t);t--;)
+	{
+		scanf("%d%d",&n,&m);
+		build();
+		for(int i=0;i<m;i++) 
+		{
+			scanf("%d%d%d",&L,&R,&delta);
+			update(L,R,delta);
+		}
+		printf("Case %d: The total value of the hook is %d.\n",ans++,tree[1]);
+	} 
+}