Submission #344565

#	Time	Username	Problem	Language	Result	Execution time	Memory
344565		DavidZ122	Traffic (IOI10_traffic)	C++14	Compilation error	0 ms	0 KiB

traffic

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi; 
typedef vector<pair<int,int>> vpi;
typedef long long ll; 
#define FIO ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define F1R(i,a) FOR(i,1,a)
#define ROF(i,a,b) for ( i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
#define rsz resize
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define f first
#define s second
#define mp make_pair
#define pb push_back
void setIO(string name = "") { 
    ios_base::sync_with_stdio(0); cin.tie(0); 
   
    if (sz(name)) {
        freopen((name+".in").c_str(), "r", stdin); 
        freopen((name+".out").c_str(), "w", stdout);
    }
}
bool cmp(const pair<pair<int,int>,int>&a, const pair<pair<int,int>,int> &b)
{
	return a.s>b.s;
}
bool cmp2(const pair<pair<int,int>,int>&a, const pair<pair<int,int>,int> &b)
{
	return a.f.s>b.f.s;
}
const int SZ=1e6+1;
const int MOD=1e9+7;
int fans[SZ];
vi adj[SZ];
ll dfs(int node)
{
	ll ans=fans[node];
	trav(x, adj[node])
	{
		ans+=dfs(x);
	}
	return ans;
}
ll solve(int node)
{
	ll m=INT_MAX;
	trav(x, adj[node])
	{
		m=fmin(m, dfs(x));
	}
	return m;
}
int main() {
    FIO;
   	ll n; cin>>n;
   	F0R(i, n) cin>>fans[i];
	F0R(i, n-1)
	{
		ll a, b; cin>>a>>b;
		adj[a].pb(b);
		adj[b].pb(a);
	}
	ll ans=0, ansMin=INT_MAX;
	F0R(i, n)
	{
		ll a=solve(i);
		if(a<ansMin)
		{
			ans=i;
			ansMin=a;
		}
	}
	cout<<ans+1<<endl;
}

Compilation message (stderr)

traffic.cpp: In function 'void setIO(std::string)':
traffic.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   24 |         freopen((name+".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
traffic.cpp:25:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   25 |         freopen((name+".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/ccPnb8zI.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccukFcKU.o:traffic.cpp:(.text.startup+0x0): first defined here
/tmp/ccPnb8zI.o: In function `main':
grader.cpp:(.text.startup+0xd9): undefined reference to `LocateCentre(int, int*, int*, int*)'
collect2: error: ld returned 1 exit status