Submission #415531

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
415531	2021-06-01 08:10:17	Pro_ktmr	Parachute rings (IOI12_rings)	C++17	100 / 100	2280 ms	141600 KiB

rings

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#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define all(x) x.begin(), x.end()
#define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
#define repi(i, a, b) for(int (i)=(a); (i)<(b); (i)++)
struct UnionFind{
    int N;
    vector<int> par, siz, dig;
    int exc;
    bool ok = true;
    void init(int n, int _exc){
        N = n;
        par = vector<int>(N, -1);
        siz = vector<int>(N, 1);
        exc = _exc;
        dig = vector<int>(N, 0);
    }
    int root(int a){
        if(par[a] == -1) return a;
        return par[a] = root(par[a]);
    }
    int unite(int a, int b){
        if(a == exc || b == exc) return 1;
        dig[a]++; dig[b]++;
        ok &= (dig[a] <= 2 && dig[b] <= 2);
        int ra = root(a), rb = root(b);
        if(ra == rb){
            ok = false;
 
 
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Compilation message (stderr)

rings.cpp: In function 'void Link(int, int)':
rings.cpp:5:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
      |                           ^
rings.cpp:70:13: note: in expansion of macro 'rep'
   70 |             rep(i, 3) spec[i+1].init(N, e[A][i]);
      |             ^~~
rings.cpp:5:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
      |                           ^
rings.cpp:71:13: note: in expansion of macro 'rep'
   71 |             rep(i, 4) for(auto [a,b]:note){
      |             ^~~
rings.cpp:5:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
      |                           ^
rings.cpp:79:13: note: in expansion of macro 'rep'
   79 |             rep(i, 3) spec[i+1].init(N, e[B][i]);
      |             ^~~
rings.cpp:5:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
      |                           ^
rings.cpp:80:13: note: in expansion of macro 'rep'
   80 |             rep(i, 4) for(auto [a,b]:note){
      |             ^~~
rings.cpp:5:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, n) for(int (i)=0; (i)<(n); (i)++)
      |                           ^
rings.cpp:110:9: note: in expansion of macro 'rep'
  110 |         rep(i, 4) spec[i].unite(A, B);
      |         ^~~

• Subtask 1: 20 / 20
• Subtask 2: 17 / 17
• Subtask 3: 18 / 18
• Subtask 4: 14 / 14
• Subtask 5: 31 / 31