Submission #466756

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
466756	2021-08-20 15:51:13	M4mou	Handcrafted Gift (IOI20_gift)	C++17	35 / 100	189 ms	15188 KiB

gift

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#include <bits/stdc++.h>
#include "gift.h"
using namespace std;
vector<int>parent;
void init(int n) { parent.resize(n); for(int l=0;l<n;l++) parent[l]=l; }
int findset(int n) { return (parent[n]==n)?n:(parent[n]=findset(parent[n])); }
bool sameSet(int a, int b) { return findset(a)==findset(b); }
void unionSet(int a, int b) {
    if(sameSet(a, b)) return;
    a=findset(a); b=findset(b);
    if(a < b)
    parent[a]=b;
    else parent[b] = a;
}
int construct(int n, int r, std::vector<int> a, std::vector<int> b, std::vector<int> x) {
    init(n+1);
    for(int i = 0; i < r; i++){
        if(x[i] == 2) continue;
        int j = a[i];
        while(findset(j) != findset(b[i])){
            unionSet(j,b[i]);
            j++;
        }
    }
    for(int i=0;i<r;i++){
        if(x[i]==1){
            continue;
 
 
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• Subtask 1: 0 / 10
• Subtask 2: 15 / 15
• Subtask 3: 20 / 20
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30