Submission #551498

#	Time	Username	Problem	Language	Result	Execution time	Memory
551498		PiejanVDC	Split the Attractions (IOI19_split)	C++17	0 / 100	1 ms	212 KiB

split

#include "split.h"
#include<bits/stdc++.h>

using namespace std;

vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {
    vector<int>adj[n];
    const int m = (int)p.size();
    for(int i = 0 ; i < m ; i++) {
        adj[p[i]].push_back(q[i]);
        adj[q[i]].push_back(p[i]);
    }

    vector<int>col(n,0);

    int start = 0;
    for(int i = 0 ; i < n ; i++)
        if((int)adj[i].size() == 1)
            start = i;

    stack<int>s;
    s.push(start);
    int sz = 1;
    col[start] = 2;
    vector<bool>vis(n,0);
    vis[start] = 1;
    vector<bool>real(n,0);
    while(sz < b) {
        int node = s.top();
        s.pop();
        real[node] = 1;
        col[node] = 2;
        sz++;
        for(auto z : adj[node]) if(!vis[z]) {
            s.push(z);
            vis[z] = 1;
        }
    }
    vis.clear();
    vis.resize(n,0);
    for(int i = 0 ; i < n ; i++) {
        if(!real[i]) {
            while(!s.empty())
                s.pop();
            s.push(i);
            sz = 1;
            vis[i] = 1;
            col[i] = 1;
            while(sz < a) {
                int node = s.top();
                s.pop();
                sz++;
                col[node] = 1;
                for(auto z : adj[node]) if(!vis[z]) {
                    s.push(z);
                    vis[z] = 1;
                }
            }
            break;
        }
    }
    for(int i = 0 ; i < n ; i++)
        if(!col[i])
            col[i] = 3;
        return col;
}

Compilation message (stderr)

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:62:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   62 |     for(int i = 0 ; i < n ; i++)
      |     ^~~
split.cpp:65:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   65 |         return col;
      |         ^~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36