Cod sursa(job #220434)

Utilizator savimSerban Andrei Stan savim Data 10 noiembrie 2008 21:27:57
Problema Zoo Scor 90
Compilator cpp Status done
Runda Arhiva de probleme Marime 4.38 kb
#include <stdio.h>
#include <algorithm>

using namespace std;

#define MAX_N 100000
#define MAX_L 417000
#define inf 2147000000

int n, m, i, j, k, semn, x1, y1, x2, y2, p, q, sum, i1, i2;
int aib[MAX_L];
int intreb[MAX_L];
int ordon[MAX_L], v[MAX_L];
int qry[5][MAX_N];
char s[50];

struct punct {
	int x;
	int y;
};

punct a[MAX_L], b[MAX_L];

void cit() {
	freopen("zoo.in", "r", stdin);
	freopen("zoo.out", "w", stdout);
	     //citirea parsata    
    scanf("%d\n",&n);    
    for (i = 1; i <= n; v[i] = i, i++)     
        scanf("%d %d",&a[i].x, &a[i].y);    
        
    scanf("%d\n", &m);    
    for (i = 1; i <= m; i++) {    
        fgets(s,50,stdin);    
            
        j = 0;    
        semn = 1;x1 = 0;    
        if (s[j] == '-') {semn = -1; j++;}    
        for (j = j; s[j] != ' '; j++)    
            x1 = x1 * 10 + s[j] - '0';    
        x1 *= semn;    
            
        j++;    
        semn = 1; y1 = 0;    
        if (s[j] == '-') {semn = -1; j++;}    
        for (j = j; s[j] != ' '; j++)    
            y1 = y1 * 10 + s[j] - '0';    
        y1 *= semn;    
            
        j++;    
        semn = 1; x2 = 0;    
        if (s[j] == '-') {semn = -1; j++;}    
        for (j = j; s[j] != ' '; j++)    
            x2 = x2 * 10 + s[j] - '0';    
        x2 *= semn;    
            
        j++;    
        semn = 1; y2 = 0;    
        if (s[j] == '-') {semn = -1; j++;}    
        for (j = j; s[j] != '\n' && s[j] != '\0'; j++)    
            y2 = y2 * 10 + s[j] - '0';    
        y2 *= semn;    
    
        a[++n].x = x1 - 1; a[n].y = y1 - 1; intreb[n] = i;    
        a[++n].x = x1 - 1; a[n].y = y2; intreb[n] = i;    
        a[++n].x = x2; a[n].y = y1 - 1; intreb[n] = i;    
        a[++n].x = x2; a[n].y = y2; intreb[n] = i;    
    }           
}

void inter2(int p, int q) {
     int r = (p + q) / 2; k = 0, i1 = p, i2 = r + 1;
     
     while (i1 <= r && i2 <= q) {
           if (a[v[i1]].y < a[v[i2]].y) ordon[++k] = v[i1++];
           else ordon[++k] = v[i2++];
     }
     
     while (i1 <= r) ordon[++k] = v[i1++];
     while (i2 <= q) ordon[++k] = v[i2++];
     
    k = 0;
	for (i = p; i <= q; i++) 
		v[i] = ordon[++k];
}

void merge2(int p, int q) {
     if (p >= q) return;
     int r = (p + q) / 2;
     merge2(p, r);
     merge2(r + 1, q);
     inter2(p, q);
}

void normalizare () {
	p = 1; q = 1;
	for (i = 1; i <= n; i++) {
		b[i].x = p;
		if (a[i].x > a[i - 1].x) b[i].x = ++p;

		v[i] = i;
	}

	merge2(1, n);
	
	for (i = 1; i <= n; i++) {
		b[v[i]].y = q;
		if (a[v[i]].y > a[v[i - 1]].y) b[v[i]].y = ++q;
	}
}

void update(int k) {
	while (k <= q) {
	    aib[k]++;
		k += k ^ (k & (k - 1));
	}
}

int query(int k) {
	sum = 0;
	while (k) {
		sum += aib[k];
		k -= k ^ (k & (k - 1));
	}
	return sum;
}

void parcurg() {
	for (i = 1; i <= n; i++) {
		//update
		if (intreb[i] == 0) update(b[i].y);
		
		//query
		if (intreb[i] != 0) {
           p = intreb[i];
		   qry[++qry[0][p]][p] = query(b[i].y);
        }   
	}
}

void inter(int p, int q) {
     int r = (p + q) / 2; k = 0, i1 = p, i2 = r + 1;
     
     while (i1 <= r && i2 <= q) {
           if ((a[i1].x < a[i2].x) || (a[i1].x == a[i2].x && a[i1].y < a[i2].y)||
               (a[i1].x == a[i2].x && a[i1].y == a[i2].y && intreb[i1] < intreb[i2])) {
               b[++k].x = a[i1].x; b[k].y = a[i1].y; ordon[k] = intreb[i1]; i1++;
           }
           else { b[++k].x = a[i2].x; b[k].y = a[i2].y; ordon[k] = intreb[i2]; i2++;}
     }
     
     while (i1 <= r) {b[++k].x = a[i1].x; b[k].y = a[i1].y; ordon[k] = intreb[i1]; i1++;};
     while (i2 <= q) {b[++k].x = a[i2].x; b[k].y = a[i2].y; ordon[k] = intreb[i2]; i2++;};
     
     k = 0;
     for (i = p; i <= q; i++) {
         a[i].x = b[++k].x; a[i].y = b[k].y; intreb[i] = ordon[k];
     }
}

void merge(int p, int q) {
     if (p >= q) return;
     int r = (p + q) / 2;
     merge(p, r);
     merge(r + 1, q);
     inter(p, q);
}

void solve() {
	//sortarea elementelor
	merge(1, n);
	
	//normalizarea elementelor
	normalizare();
	
	//parcurgerea elementelor si query - urile respective
	parcurg();
}

void write() {
	for (i = 1; i <= m; i++) {
		sum = qry[4][i] - qry[2][i] - qry[3][i] + qry[1][i];
		printf("%d\n",sum);
	}
}

int main() {

	cit();
	solve();
	write(); 
	
	return 0;
}