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a guest Dec 6th, 2018 57 Never
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  1. #include <cstdio>
  2. #include <stdio.h>
  3. #include <vector>
  4. #include <cmath>
  5. #include <string.h>
  6. #include <iostream>
  7. #include <algorithm>
  8. #include <string>
  9. using namespace std;
  10.  
  11. int main()
  12. {
  13.     vector <int> w(6);
  14.     vector <int> h(6);
  15.     vector <vector <int> > same(10000,vector<int> (10000));
  16.     vector <int> amount(10000,0);
  17.     for (int i =0;i<6;++i) {
  18.         cin>> w[i]>>h[i];
  19.         same[w[i]][h[i]]++;
  20.         same[h[i]][w[i]]++;
  21.         amount[w[i]]=w[i];
  22.         amount[h[i]]=h[i];
  23.     }
  24.     int result=0;
  25.     for (int i =0;i<amount.size();++i) {
  26.         if (amount[i]!=0) result++;
  27.     }
  28.     if (result == 1) {
  29.         cout << "POSSIBLE";
  30.         return 0;
  31.     }
  32.     if (result >3) {
  33.         cout << "IMPOSSIBLE";
  34.         return 0;
  35.     }
  36.     bool pr=true;
  37.     if (result ==3) {
  38.         for (int i =0;i<6;++i) {
  39.             if (same[w[i]][h[i]]!=2)
  40.             pr=false;
  41.         }
  42.         if (pr) cout << "POSSIBLE"; else cout << "IMPOSSIBLE";
  43.         return 0;
  44.     }
  45.     int p=0;
  46.     if (result ==2) {
  47.         for (int i=0; i<6;++i) {
  48.             if (same[w[i]][h[i]]==4)
  49.                 p++;
  50.             if (same[w[i]][h[i]]==2) p++;
  51.         }
  52.         if (p==2) cout << "POSSIBLE"; else cout << "IMPOSSIBLE";
  53.         return 0;
  54.     }
  55. }
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