CF702F T-Shirts FHQ Treap
题意翻译
题目大意：
有n种T恤，每种有价格ci和品质qi。有m个人要买T恤，第i个人有vi元，每人每次都会买一件能买得起的qi最大的T恤。一个人只能买一种T恤一件，所有人之间都是独立的。问最后每个人买了多少件T恤？
题目描述
The big consignment of t-shirts goes on sale in the shop before the beginning of the spring. In all n n n types of t-shirts go on sale. The t-shirt of the i i i -th type has two integer parameters — ci c_{i} ci and qi q_{i} qi , where ci c_{i} ci — is the price of the i i i -th type t-shirt, qi q_{i} qi — is the quality of the i i i -th type t-shirt. It should be assumed that the unlimited number of t-shirts of each type goes on sale in the shop, but in general the quality is not concerned with the price.
As predicted, k k k customers will come to the shop within the next month, the j j j -th customer will get ready to spend up to bj b_{j} bj on buying t-shirts.
All customers have the same strategy. First of all, the customer wants to buy the maximum possible number of the highest quality t-shirts, then to buy the maximum possible number of the highest quality t-shirts from residuary t-shirts and so on. At the same time among several same quality t-shirts the customer will buy one that is cheaper. The customers don't like the same t-shirts, so each customer will not buy more than one t-shirt of one type.
Determine the number of t-shirts which each customer will buy, if they use the described strategy. All customers act independently from each other, and the purchase of one does not affect the purchase of another.
输入输出格式
输入格式：The first line contains the positive integer n n n ( 1<=n<=2⋅105 1<=n<=2·10^{5} 1<=n<=2⋅105 ) — the number of t-shirt types.
Each of the following n n n lines contains two integers ci c_{i} ci and qi q_{i} qi ( 1<=ci,qi<=109 1<=c_{i},q_{i}<=10^{9} 1<=ci,qi<=109 ) — the price and the quality of the i i i -th type t-shirt.
The next line contains the positive integer k k k ( 1<=k<=2⋅105 1<=k<=2·10^{5} 1<=k<=2⋅105 ) — the number of the customers.
The next line contains k k k positive integers b1,b2,...,bk b_{1},b_{2},...,b_{k} b1,b2,...,bk ( 1<=bj<=109 1<=b_{j}<=10^{9} 1<=bj<=109 ), where the j j j -th number is equal to the sum, which the j j j -th customer gets ready to spend on t-shirts.
输出格式：The first line of the input data should contain the sequence of k k k integers, where the i i i -th number should be equal to the number of t-shirts, which the i i i -th customer will buy.
输入输出样例
说明
In the first example the first customer will buy the t-shirt of the second type, then the t-shirt of the first type. He will spend 10 and will not be able to buy the t-shirt of the third type because it costs 4, and the customer will owe only 3. The second customer will buy all three t-shirts (at first, the t-shirt of the second type, then the t-shirt of the first type, and then the t-shirt of the third type). He will spend all money on it.
朴素算法很好想，但TLE；
考虑用平衡树维护；
我们先将衬衫按quality排序；
然后对于每一件衬衫，我们在用人的钱构成的树中操作；
对于>=C[i] 的进行标记，然后下传；
但是-C[i]后，不一定满足merge的条件；
我们可以暴力对于重复的部分进行merge；
#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstdlib>
#include<cstring>
#include<string>
#include<cmath>
#include<map>
#include<set>
#include<vector>
#include<queue>
#include<bitset>
#include<ctime>
#include<deque>
#include<stack>
#include<functional>
#include<sstream>
//#include<cctype>
//#pragma GCC optimize(2)
using namespace std;
#define maxn 200005
#define inf 0x7fffffff
//#define INF 1e18
#define rdint(x) scanf("%d",&x)
#define rdllt(x) scanf("%lld",&x)
#define rdult(x) scanf("%lu",&x)
#define rdlf(x) scanf("%lf",&x)
#define rdstr(x) scanf("%s",x)
typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int U;
#define ms(x) memset((x),0,sizeof(x))
const long long int mod = 1e9;
#define Mod 1000000000
#define sq(x) (x)*(x)
#define eps 1e-5
typedef pair<int, int> pii;
#define pi acos(-1.0)
//const int N = 1005;
#define REP(i,n) for(int i=0;i<(n);i++)
typedef pair<int, int> pii;
inline int rd() {
int x = 0;
char c = getchar();
bool f = false;
while (!isdigit(c)) {
if (c == '-') f = true;
c = getchar();
}
while (isdigit(c)) {
x = (x << 1) + (x << 3) + (c ^ 48);
c = getchar();
}
return f ? -x : x;
}
ll gcd(ll a, ll b) {
return b == 0 ? a : gcd(b, a%b);
}
int sqr(int x) { return x * x; }
/*ll ans;
ll exgcd(ll a, ll b, ll &x, ll &y) {
if (!b) {
x = 1; y = 0; return a;
}
ans = exgcd(b, a%b, x, y);
ll t = x; x = y; y = t - a / b * y;
return ans;
}
*/
int n, m, root;
int lson[maxn], rson[maxn], val[maxn], rnd[maxn];
int cnt[maxn], add[maxn], ans[maxn];
void pushdown(int v) {
if (add[v]) {
add[lson[v]] += add[v]; add[rson[v]] += add[v];
val[lson[v]] += add[v]; val[rson[v]] += add[v];
add[v] = 0;
}
if (ans[v]) {
ans[lson[v]] += ans[v]; ans[rson[v]] += ans[v];
cnt[lson[v]] += ans[v]; cnt[rson[v]] += ans[v];
ans[v] = 0;
}
}
void split(int k, int &x, int &y, int v) {
if (!k) {
x = y = 0; return;
}
pushdown(k);
if (val[k] < v) {
x = k; split(rson[k], rson[x], y, v);
}
else {
y = k; split(lson[k], x, lson[y], v);
}
}
int merge(int x, int y) {
if (!x || !y)return x + y;
if (rnd[x] < rnd[y]) {
pushdown(x); rson[x] = merge(rson[x], y);
return x;
}
else {
pushdown(y); lson[y] = merge(x, lson[y]);
return y;
}
}
int ins(int x, int y) {
int r1 = 0, r2 = 0;
split(x, r1, r2, val[y]);
x = merge(merge(r1, y), r2);
return x;
}
int build(int v, int y) {
if (!v)return y;
pushdown(v);
y = build(lson[v], y); y = build(rson[v], y);
lson[v] = rson[v] = 0;
return ins(y, v);
}
void dfs(int v) {
if (!v)return;
pushdown(v);
dfs(lson[v]); dfs(rson[v]);
}
pii a[maxn];
int main()
{
//ios::sync_with_stdio(0);
n = rd(); int c, q;
for (int i = 1; i <= n; i++) {
c = rd(); q = rd();
a[i] = make_pair(-q, c);
}
sort(a + 1, a + 1 + n);
m = rd();
for (int i = 1; i <= m; i++) {
val[i] = rd();
rnd[i] = rand();
root = ins(root, i);
}
for (int i = 1; i <= n; i++) {
int c = a[i].second;
int r1 = 0, r2 = 0, r3 = 0, r4 = 0;
split(root, r1, r2, c);
val[r2] -= c; add[r2] -= c;
cnt[r2]++; ans[r2]++;
split(r2, r3, r4, c - 1);
r1 = build(r3, r1);
root = merge(r1, r4);
}
dfs(root);
for (int i = 1; i <= m; i++)printf("%d ", cnt[i]);
return 0;
}
