Submission #383081

#	Time	Username	Problem	Language	Result	Execution time	Memory
383081		DarkVoid	Traffic (IOI10_traffic)	C++11	100 / 100	1298 ms	225772 KiB

This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.

traffic

#pragma GCC optimize("unroll-loops, O3")
#pragma GCC target("avx")
#include <bits/stdc++.h>
using namespace std;

int n, a[1000000], cnt[1000000], mx[1000000];
vector<int> adj[1000000];

void dfs(int vtx, int pre, vector<vector<int>> &adj, vector<int> &cnt, vector<int> &mx, int a[]){
    mx[vtx] = 0, cnt[vtx] = a[vtx];
    for(int i : adj[vtx])
        if(i != pre){
            dfs(i, vtx, adj, cnt, mx, a);
            cnt[vtx] += cnt[i];
            mx[vtx] = max(mx[vtx], cnt[i]);
        }
}

int LocateCentre(int n, int a[], int s[], int d[]){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    vector<vector<int>> adj(n);
    vector<int> cnt(n), mx(n);
    for(int i = 0; i < n - 1; i++){
        adj[s[i]].push_back(d[i]);
        adj[d[i]].push_back(s[i]);
    }
    dfs(0, -1, adj, cnt, mx, a);
    pair<int, int> ans(INT_MAX, -1);
    for(int i = 0; i < n; i++)
        ans = min(ans, make_pair(max(cnt[0] - cnt[i], mx[i]), i));
    return ans.second;
}

Compilation message (stderr)

traffic.cpp:1:40: warning: bad option '-f O3' to pragma 'optimize' [-Wpragmas]
    1 | #pragma GCC optimize("unroll-loops, O3")
      |                                        ^
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
    2 | #pragma GCC target("avx")
      |                         ^
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
traffic.cpp:2:25: warning: bad option '-f O3' to attribute 'optimize' [-Wattributes]
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