Submission #362404

#	Time	Username	Problem	Language	Result	Execution time	Memory
362404		knightron0	Traffic (IOI10_traffic)	C++14	0 / 100	2 ms	2668 KiB

traffic

#include <bits/stdc++.h>
using namespace std;

#define pb push_back
#define fr first
#define sc second
#define clr(a, x) memset(a, x, sizeof(a))
#define dbg(x) cout<<"("<<#x<<"): "<<x<<endl;
#define printvector(arr) for (auto it = arr.begin(); it != arr.end(); ++it) cout<<*it<<" "; cout<<endl;
#define all(v) v.begin(), v.end()
#define lcm(a, b) (a * b)/__gcd(a, b)
#define printvecpairs(vec) for(auto it: vec) cout<<it.fr<<' '<<it.sc<<endl;
#define endl '\n'
#define float long double

const int MOD = 1e9 + 7;
const int INF = 2e15;
const int MAXN = 1e5 + 5;

vector<int> adj[MAXN];
int value[MAXN];
int sz[MAXN] = {0};

int dfs(int s, int p){
	int ans = value[s];
	for(auto v: adj[s]){
		if(v ==p) continue;
		ans += dfs(v, s);
	}
	sz[s] = ans;
	return ans;
}
int ans = INT_MAX;


void dfs2(int s, int p, int last){
	int mx = last;
	int sum = last;
	for(auto v: adj[s]){
		if(v==p) continue;
		sum += sz[v];
		mx = max(mx, sz[v]);
	}
	ans = min(ans, mx);
	for(auto v: adj[s]){
		if(v==p) continue;
		int newlast = sum-sz[v];
		newlast += value[s];
		dfs2(v, s, newlast);
	}
}

int LocateCentre(int n, int p[], int d[], int s[]) {
	sz[0] = 0;
	value[0]= 0;
	for(int i= 0;i<n-1;i++){
		d[i]++; s[i]++;
		adj[d[i]].pb(s[i]);
		adj[s[i]].pb(d[i]);
	}
	for(int i= 0;i<n;i++){
		value[i+1] = p[i];
	}
	dfs(1, -1);
	dfs2(1, 0, 0);
	cout<<ans<<endl;
	return 0;
}

// signed main() {
//     ios_base::sync_with_stdio(false);
//     cin.tie(NULL);
//     #ifdef LOCAL
//     freopen("input.txt", "r", stdin);
//     #endif
//     int n;
//     cin>>n;
//     int val[n];
//     for(int i= 0;i<n;i++){
//     	cin>>val[i];
//     }
//     int a[n], b[n];
//     for(int i= 0;i<n-1;i++){
//     	cin>>a[i]>>b[i];
//     }
//     LocateCentre(n, val, a, b);
//     return 0;
// }

Compilation message (stderr)

traffic.cpp:17:17: warning: overflow in conversion from 'double' to 'int' changes value from '2.0e+15' to '2147483647' [-Woverflow]
   17 | const int INF = 2e15;
      |                 ^~~~

• Subtask 1: 0 / 25
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25