Create 5869_kopyh.cpp

From http://blog.csdn.net/kopyh/article/details/52496525

HDOJ/5869_kopyh.cpp

@@ -0,0 +1,136 @@
+//kopyh
+#include <bits/stdc++.h>
+#define INF 0x3f3f3f3f
+#define MOD 1000000007
+#define N 112345
+using namespace std;
+int n,m,sum,res,flag;
+#define root 1 , n , 1
+#define lson l , m , rt << 1
+#define rson m + 1 , r , rt << 1 | 1
+struct node
+{
+    int pos,val;
+    node(int x=0,int y=0){pos=x,val=y;}
+    friend bool operator < (node a, node b)
+    {
+        return a.val < b.val;
+    }
+    friend node operator + (node a, node b)
+    {
+        return  node(a.pos,a.val+b.val);
+    }
+}arr[N<<2];
+int add[N<<2],tot;
+void pushUp(int rt)
+{
+    arr[rt] = arr[rt<<1]+arr[rt<<1|1];
+}
+void pushDown(int l,int r,int rt)
+{
+    if(add[rt])
+    {
+        int m = (l+r)>>1;
+        add[rt<<1] += add[rt];
+        add[rt<<1|1] += add[rt];
+        arr[rt<<1].val += (m-l+1)*add[rt];
+        arr[rt<<1|1].val += (r-m)*add[rt];
+        add[rt] = 0;
+    }
+}
+void updata(int l,int r,int rt,int ql,int qr,int val)
+{
+    if(l>qr||ql>r)return;
+    if(l>=ql&&r<=qr)
+    {
+        arr[rt].val += (r-l+1)*val;
+        add[rt] += val;
+        return;
+    }
+    pushDown(l,r,rt);
+    int m = (l+r)>>1;
+    if(ql<=m)updata(lson,ql,qr,val);
+    if(qr>m)updata(rson,ql,qr,val);
+    pushUp(rt);
+}
+void build(int l,int r,int rt)
+{
+    add[rt]=0;
+    if(l == r)
+    {
+        arr[rt].val = 0;
+        arr[rt].pos = tot;
+        return;
+    }
+    int m = (l+r)>>1;
+    build(lson);
+    build(rson);
+    pushUp(rt);
+}
+node query(int l,int r,int rt,int ql,int qr)
+{
+    if(l>qr||ql>r)
+        return node(0,0);
+    if(l>=ql&&r<=qr)
+        return arr[rt];
+    pushDown(l,r,rt);
+    int m = (l+r)>>1;
+    return query(lson,ql,qr)+query(rson,ql,qr);
+}
+int a[N],pos[N*10],ans[N];
+vector<pair<int,int> >vc[N],qu[N];
+int gcd(int x,int y)
+{   return y?gcd(y,x%y):x;  }
+int main()
+{
+    #ifndef ONLINE_JUDGE
+        freopen("test.txt","r",stdin);
+    #endif
+    int i,j,k,cas,T,t,x,y,z,now;
+    while(scanf("%d%d",&n,&m)!=EOF)
+    {
+        for(i=1;i<=n;i++)
+        {
+            scanf("%d",&a[i]);
+            vc[i].clear();
+            qu[i].clear();
+        }
+        for(i=1;i<=n;i++)
+        {
+            x=a[i]; y=i;
+            for(j=0;j<vc[i-1].size();j++)
+            {
+                t = gcd(vc[i-1][j].first,a[i]);
+                if(t!=x)
+                {
+                    vc[i].push_back(make_pair(x,y));
+                    x=t; y=vc[i-1][j].second;
+                }
+            }
+            vc[i].push_back(make_pair(x,y));
+        }
+        for(i=1;i<=m;i++)
+        {
+            scanf("%d%d",&x,&y);
+            qu[y].push_back(make_pair(x,i));
+        }
+        memset(pos,0,sizeof(pos));
+        build(root);
+        for(i=1;i<=n;i++)
+        {
+            for(j=0;j<vc[i].size();j++)
+                if(pos[vc[i][j].first] < vc[i][j].second)
+                {
+                    if(pos[vc[i][j].first])updata(root,pos[vc[i][j].first],pos[vc[i][j].first],-1);
+                    updata(root,vc[i][j].second,vc[i][j].second,1);
+                    pos[vc[i][j].first] = vc[i][j].second;
+//                    printf("pos=%d %d\n",vc[i][j].first,pos[vc[i][j].first]);
+                }
+            for(j=0;j<qu[i].size();j++)
+                ans[qu[i][j].second] = query(root,qu[i][j].first,i).val;
+        }
+        for(i=1;i<=m;i++)
+            printf("%d\n",ans[i]);
+    }
+    return 0;
+}