Submission #1174835

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1174835	2025-03-27 12:40:09	khanhphucscratch	Stations (IOI20_stations)	C++20	0 / 100	2 ms	552 KiB

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#include "stations.h"
#include<bits/stdc++.h>
using namespace std;
//Subtask 1
vector<int> ad[1005];
int deg[1005], tin[1005], tout[1005], dfsc = 0;
bool visited[1005];
int decode(int x, int y)
{
    x--; y--;
    //x >= y
    int ans = x*(x+1)/2;
    return ans + y;
}
pair<int, int> encode(int x)
{
    int p = 0;
    while(p*(p+1)/2 <= x) p++;
    p--;
    return {p+1, x - p*(p+1)/2+1};
}
void dfs(int u)
{
    visited[u] = 1; tin[u] = dfsc;
    bool befchild = 0;
    for(int v : ad[u]) if(visited[v] == 0){
        dfs(v);
        if(befchild == 1) dfsc++;
        befchild = 1;
    }
 
 
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• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61