93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
#include <iostream>
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#include <cstdio>
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#include <cstring>
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#include <cmath>
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#include <algorithm>
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#include <vector>
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#define pii pair<int,LL>
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using namespace std;
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typedef long long LL;
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const int N = 100005;
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struct Trie {
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Trie *next[2];
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vector<pii> a;
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}*root , s[N << 2];
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char ope[10];
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int tot = 0 , can[N] , ok[1025] , idx = 0;
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LL ip (int a , int b , int c , int d) {
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LL ret = 0;
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ret |= (LL)a << 24;
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ret |= (LL)b << 16;
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ret |= (LL)c << 8;
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ret |= d;
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return ret;
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}
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Trie *newnode () {
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Trie *t = &s[tot ++];
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t -> next[0] = t -> next[1] = NULL;
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t -> a.clear();
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return t;
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}
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void insert (Trie *p , LL ip , int l , int id) {
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for (int i = 0 ; i < l ; i ++) {
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int c = (ip >> (31 - i)) & 1;
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if (p -> next[c] == NULL)
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p -> next[c] = newnode ();
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p = p -> next[c];
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}
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LL num = ip & ((1 << (32 - l)) - 1);
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p -> a.push_back (make_pair (id , num));
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}
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void down (LL ip) {
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Trie *p = root;
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for (int i = 31 ; i >= 0 ; i --) {
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int c = (ip >> i) & 1;
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if (p -> next[c] == NULL) return ;
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p = p -> next[c];
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for (int j = 0 ; j < p -> a.size() ; j ++) {
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if (can[p -> a[j].first] && p -> a[j].second <= (ip & ((1 << (i - 1)) - 1)))
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ok[p -> a[j].first] = idx;
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}
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}
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}
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bool up (LL ip) {
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Trie *p = root;
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for (int i = 31 ; i >= 0 ; i --) {
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int c = (ip >> i) & 1;
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if (p -> next[c] == NULL) return false;
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p = p -> next[c];
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for (int j = 0 ; j < p -> a.size() ; j ++) {
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if (can[p -> a[j].first] && p -> a[j].second <= (ip & ((1 << (i - 1)) - 1)) && ok[p -> a[j].first] == idx)
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return true;
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}
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}
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return false;
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}
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int main () {
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root = newnode ();
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while (scanf ("%s" , ope) != EOF) {
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if (ope[0] == 'E') {
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int id , k , a , b , c , d , u;
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scanf ("%d %d" , &id , &k);
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for (int i = 0 ; i < k ; i ++) {
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scanf ("%d.%d.%d.%d/%d" , &a , &b , &c , &d , &u);
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insert (root , ip (a , b , c , d) , u , id);
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}
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can[id] = 1;
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}
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else if (ope[0] == 'D') {
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int id;scanf ("%d" , &id);
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can[id] = 0;
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}
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else {
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idx ++;
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int a , b , c , d;
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scanf ("%d.%d.%d.%d" , &a , &b , &c , &d);
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down (ip (a , b , c , d));
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scanf ("%d.%d.%d.%d" , &a , &b , &c , &d);
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puts (up (ip (a , b , c , d)) ? "F" : "D");
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}
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}
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return 0;
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}
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