Submission #39117

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
39117	2018-01-09 11:08:06	14kg	Ideal city (IOI12_city)	C++11	100 / 100	909 ms	64948 KiB

city

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#include <map>
#include <algorithm>
#include <vector>
#include <stdio.h>
#define N 100000
#define MOD 1000000000
#define INF 2147483646
#define min2(x,y) (x<y?x:y)
#define max2(x,y) (x>y?x:y)
using namespace std;
int n, tree1_len, tree2_len, tree1_cnt[N], tree2_cnt[N];
long long out;
pair<int, long long> t_save[N];
vector<int> tree1[N], tree2[N];
map<int, int > tree1_NUM[N], tree2_NUM[N];
map<int, bool> M[N], tree1_link[N], tree2_link[N];
pair<int, long long> count_tree1(int lev, int up) {
  long long cnt = 0, t = 0;
  pair<int, long long> temp;
  for (auto i : tree1[lev])
    if (i != up) {
      t_save[i] = temp = count_tree1(i, lev);
      t += temp.second, cnt += temp.first;
    }
  for (auto i : tree1[lev])
    if (i != up)
      out += (long long)t_save[i].first*(t - t_save[i].second), out %= MOD;
 
 
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• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 23 / 23
• Subtask 4: 45 / 45