标签:
转自:http://blog.csdn.net/lwt36/article/details/50625051
我觉得是整体二分+树状数组,存个模板。
#include <algorithm> #include <cctype> #include <cmath> #include <cstdio> #include <cstdlib> #include <cstring> #include <iomanip> #include <iostream> #include <map> #include <queue> #include <string> #include <set> #include <vector> using namespace std; #define pr(x) cout << #x << " = " << x << " " #define prln(x) cout << #x << " = " << x << endl const int N = 1e5 + 10, INF = 0x3f3f3f3f, MOD = 1e9 + 7; struct Point { int x, y, z; int cnt, sum; void read() { scanf("%d%d%d", &x, &y, &z); cnt = sum = 0; } bool operator<(const Point& p) const { if(x != p.x) return x < p.x; if(y != p.y) return y < p.y; return z < p.z; } bool operator==(const Point& p) const { return x == p.x && y == p.y && z == p.z; } } p[N]; const int M = 2e5 + 10; struct BIT { int n, b[M]; void init(int _n) { n = _n; memset(b, 0, sizeof b); } void add(int i, int v) { for(; i <= n; i += i & -i) b[i] += v; } int sum(int i) { int ret = 0; for(; i; i -= i & -i) ret += b[i]; return ret; } } bit; bool cmpy(Point a, Point b) { return a.y < b.y; } void cdq(int l, int r) { if(l == r) return; int m = l + r >> 1; cdq(l, m); cdq(m + 1, r); sort(p + l, p + m + 1, cmpy); sort(p + m + 1, p + r + 1, cmpy); int j = l; for(int i = m + 1; i <= r; ++i) { for(; j <= m && p[j].y <= p[i].y; ++j) bit.add(p[j].z, p[j].cnt); p[i].sum += bit.sum(p[i].z); } for(int i = l; i < j; ++i) bit.add(p[i].z, -p[i].cnt); } int n, m, k; int ans[N]; int main() { #ifdef LOCAL freopen("C:\\Users\\TaoSama\\Desktop\\in.txt", "r", stdin); // freopen("C:\\Users\\TaoSama\\Desktop\\out.txt","w",stdout); #endif ios_base::sync_with_stdio(0); while(scanf("%d%d", &n, &k) == 2) { bit.init(k); for(int i = 1; i <= n; ++i) p[i].read(); sort(p + 1, p + 1 + n); int m = 0; for(int i = 1, j; i <= n; ++i) { for(j = i; j <= n && p[i] == p[j]; ++j) ++p[i].cnt; p[++m] = p[i]; i = j - 1; } cdq(1, m); memset(ans, 0, sizeof ans); for(int i = 1; i <= m; ++i) ans[p[i].sum + p[i].cnt - 1] += p[i].cnt; for(int i = 0; i < n; ++i) printf("%d\n", ans[i]); } return 0; }
标签:
原文地址:http://www.cnblogs.com/nj-czy/p/5954257.html