Submission #569739

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
569739	2022-05-27 17:11:19	ryangohca	Swapping Cities (APIO20_swap)	C++17	0 / 100	1229 ms	30532 KiB

swap

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#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
int p[100001], pweight[100001][20], st[100001], en[100001], lineWeight[100001][20], twok[100001][20];
void init(int N){
    iota(p, p+N, 0);
    iota(st, st+N, 0);
    iota(en, en+N, 0);
    for (int i = 0; i < N; i++) lineWeight[i][0] = 2e9;
    memset(twok, -1, sizeof twok);
    memset(pweight, -1, sizeof pweight);
}
int fs(int x){
    if (p[x] == x) return x;
    return p[x] = fs(p[x]);
}
void ms(int x, int y, int w){
    int px = fs(x), py = fs(y);
    if (px == py){
        st[px] = en[px] = -1;
        lineWeight[px][0] = min(lineWeight[px][0], w);
        return;
    }
    p[py] = px; // px -> py
    //cout << px << ' ' << py << ' ' << w << endl;
    twok[py][0] = px;
    pweight[py][0] = w;
    if (st[px] != -1 && st[py] != -1){
        if ((st[px] == x || en[px] == x) && (st[py] == y || en[py] == y)){
 
 
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• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 17
• Subtask 4: 0 / 20
• Subtask 5: 0 / 23
• Subtask 6: 0 / 27