BZOJ2527 [Poi2011]Meteors

还是一道整体二分的题目，思路和之前的类似就不再赘述了恩！

注意是一个环所以修改的时候要讨论一下

 

  1 /**************************************************************
  2     Problem: 2527
  3     User: rausen
  4     Language: C++
  5     Result: Accepted
  6     Time:10760 ms
  7     Memory:33508 kb
  8 ****************************************************************/
  9  
 10 #include <cstdio>
 11 #include <algorithm>
 12 #include <vector>
 13  
 14 using namespace std;
 15 typedef long long ll;
 16 const int N = 3e5 + 5;
 17 const ll inf = 1e9;
 18 const int Maxlen = 5 * N * 10;
 19  
 20 int n, m, k, time;
 21 int p[N], w[N], t[N], ans[N];
 22 int l[N], r[N], v[N];
 23 vector <int> a[N];
 24 ll BIT[N];
 25 bool vis[N];
 26  
 27 char buf[Maxlen], *c = buf;
 28 int Len;
 29  
 30 inline int read() {
 31     int x = 0;
 32     while (*c < '0' || '9' < *c) ++c;
 33     while ('0' <= *c && *c <= '9')
 34         x = x * 10 + *c - '0', ++c;
 35     return x;
 36 }
 37  
 38 #define lowbit(x) x & -x;
 39 inline void add(int x, int d) {
 40     while (x <= m)
 41         BIT[x] += d, x += lowbit(x);
 42 }
 43  
 44 inline ll query(int x) {
 45     ll res = 0;
 46     while (x)
 47         res += BIT[x], x -= lowbit(x);
 48     return res;
 49 }
 50 #undef lowbit
 51  
 52 inline void Add(int x, int d) {
 53     if (l[x] <= r[x])
 54         add(l[x], d * v[x]), add(r[x] + 1, d * (-v[x]));
 55     else
 56         add(1, d * v[x]), add(r[x] + 1, d * (-v[x])), add(l[x], d * v[x]);
 57 }
 58  
 59 void work(int l, int r, int L, int R) {
 60     if (l > r) return;
 61     if (L == R) {
 62         int i;
 63         for (i = l; i <= r; ++i)
 64             ans[w[i]] = L;
 65         return;
 66     }
 67     int mid = L + R >> 1, cntl = 0, now, i, j, l1, l2;
 68     ll tot;
 69     while (time <= mid) Add(++time, 1);
 70     while (time > mid) Add(time--, -1);
 71     for (i = l; i <= r; ++i) {
 72         now = w[i];
 73         for (j = tot = 0; j < a[now].size(); ++j)
 74             if ((tot += query(a[now][j])) >= p[now]) break;
 75         if (tot >= p[now]) vis[now] = 1, ++cntl;
 76         else vis[now] = 0;
 77     }
 78     for (i = l1 = l, l2 = l + cntl; i <= r; ++i)
 79         if (vis[w[i]]) t[l1++] = w[i];
 80         else t[l2++] = w[i];
 81     for (i = l; i <= r; ++i) w[i] = t[i];
 82     work(l, l1 - 1, L, mid), work(l1, r, mid + 1, R);
 83 }
 84  
 85  
 86 int main() {
 87     Len = fread(c, 1, Maxlen, stdin);
 88     buf[Len] = '\0';
 89     int i;
 90     n = read(), m = read();
 91     for (i = 1; i <= m; ++i)
 92         a[read()].push_back(i);
 93     for (i = 1; i <= n; ++i)
 94         p[i] = read(), w[i] = i;
 95     k = read();
 96     for (i = 1; i <= k; ++i)
 97         l[i] = read(), r[i] = read(), v[i] = read();
 98     ++k, l[k] = 1, r[k] = m, v[k] = inf;
 99     work(1, n, 1, k);
100     for (i = 1; i <= n; ++i)
101         if (ans[i] != k) printf("%d\n", ans[i]);
102         else puts("NIE");
103     return 0;
104 }
View Code

 

posted on 2015-03-07 20:19  Xs酱~  阅读(301)  评论(0)  编辑  收藏  举报