[CF714C]Sonya and Queries（STL）

题目链接：http://codeforces.com/contest/714/problem/C

题意：T个询问，+,-,?，+代表往一个集合里放一个数，-代表删掉一个。?表示询问这个集合里有多少个数符合一个pattern，pattern是个01串，0代表对应某一位数是个偶数，1代表对应某一位是奇数。

直接把对应的字符串全部转换成pattern形式放到map里维护一下。

  1 /*
  2 ━━━━━┒ギリギリ♂ eye！
  3 ┓┏┓┏┓┃キリキリ♂ mind！
  4 ┛┗┛┗┛┃＼○／
  5 ┓┏┓┏┓┃ /
  6 ┛┗┛┗┛┃ノ)
  7 ┓┏┓┏┓┃
  8 ┛┗┛┗┛┃
  9 ┓┏┓┏┓┃
 10 ┛┗┛┗┛┃
 11 ┓┏┓┏┓┃
 12 ┛┗┛┗┛┃
 13 ┓┏┓┏┓┃
 14 ┃┃┃┃┃┃
 15 ┻┻┻┻┻┻
 16 */
 17 #include <algorithm>
 18 #include <iostream>
 19 #include <iomanip>
 20 #include <cstring>
 21 #include <climits>
 22 #include <complex>
 23 #include <cassert>
 24 #include <cstdio>
 25 #include <bitset>
 26 #include <vector>
 27 #include <deque>
 28 #include <queue>
 29 #include <stack>
 30 #include <ctime>
 31 #include <set>
 32 #include <map>
 33 #include <cmath>
 34 using namespace std;
 35 #define fr first
 36 #define sc second
 37 #define cl clear
 38 #define BUG puts("here!!!")
 39 #define W(a) while(a--)
 40 #define pb(a) push_back(a)
 41 #define Rint(a) scanf("%d", &a)
 42 #define Rs(a) scanf("%s", a)
 43 #define FRead() freopen("in", "r", stdin)
 44 #define FWrite() freopen("out", "w", stdout)
 45 #define Rep(i, len) for(int i = 0; i < (len); i++)
 46 #define For(i, a, len) for(int i = (a); i < (len); i++)
 47 #define Cls(a) memset((a), 0, sizeof(a))
 48 #define Clr(a, x) memset((a), (x), sizeof(a))
 49 #define Full(a) memset((a), 0x7f7f7f, sizeof(a))
 50 #define lrt rt << 1
 51 #define rrt rt << 1 | 1
 52 #define pi 3.14159265359
 53 #define RT return
 54 #define lowbit(x) x & (-x)
 55 #define onenum(x) __builtin_popcount(x)
 56 typedef long long LL;
 57 typedef long double LD;
 58 typedef unsigned long long ULL;
 59 typedef pair<int, int> pii;
 60 typedef pair<string, int> psi;
 61 typedef pair<LL, LL> pll;
 62 typedef map<string, int> msi;
 63 typedef vector<int> vi;
 64 typedef vector<LL> vl;
 65 typedef vector<vl> vvl;
 66 typedef vector<bool> vb;
 67 
 68 int T;
 69 char cmd[5];
 70 map<LL, LL> s;
 71 LL n;
 72 
 73 LL get(LL x) {
 74     LL ret = 0;
 75     for(int i = 62; i >= 0; i--) {
 76         if(x & 1) ret |= (1LL << i);
 77         x /= 10;
 78         if(!x) break;
 79     }
 80     return ret;
 81 }
 82 
 83 int main() {
 84     // FRead();
 85     while(~Rint(T)) {
 86         s.clear();
 87         W(T) {
 88             Rs(cmd); cin >> n;
 89             n = get(n);
 90             LL t = n;
 91             while(t) {
 92                 cout << (t & 1);
 93                 t >>= 1;
 94             }
 95             cout << endl;
 96             if(cmd[0] == '+') s[n]++;
 97             else if(cmd[0] == '-') s[n]--;
 98             else cout << s[n] << endl;
 99         }
100     }
101     RT 0;
102 }