Submission #433654

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
433654	2021-06-20 09:15:28	magmag	Connecting Supertrees (IOI20_supertrees)	C++17	40 / 100	300 ms	26076 KiB

supertrees

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#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
 
struct UF {
    vi p, rnk;
    int nsets;
 
    UF(int n) {
        p = vi(n);
        for (int i = 0; i < n; ++i)p[i] = i;
        rnk = vi(n);
        nsets = n;
    }
 
    int parent(int i) {
        if (p[i] == i)return i;
        return p[i] = parent(p[i]);
    }
     
    bool check(int a, int b) {
        return parent(a) == parent(b);
    }
     
    void join(int a, int b) {
        if (check(a,b))return;
        nsets--;
     
        a = parent(a);
 
 
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Compilation message (stderr)

supertrees.cpp: In function 'int construct2(std::vector<std::vector<int> >)':
supertrees.cpp:72:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |         for (int i = 0; i < vv.size(); ++i) {
      |                         ~~^~~~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 10 / 10
• Subtask 3: 19 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4