제출 #144662

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
144662		stefdasca	Burza (COCI16_burza)	C++14	0 / 160	2 ms	400 KiB

burza

#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#define fi first
#define se second
#define pb push_back
#define pf push_front
#define mod 1000000007

using namespace std;

typedef long long ll;


int add(int a, int b)
{
    ll x = a+b;
    if(x >= mod)
        x -= mod;
    if(x < 0)
        x += mod;
    return x;
}
ll mul(ll a, ll b)
{
    return (a*b) % mod;
}

ll pw(ll a, ll b)
{
    ll ans = 1;
    while(b)
    {
        if(b & 1)
            ans = (ans * a) % mod;
        a = (a * a) % mod;
        b >>= 1;
    }
    return ans;
}
vector<int>v[402];
int n, k, height[402], level[402];
void dfs(int dad, int nod)
{
    vector<int>he;
    height[nod] = 1;
    for(int i = 0; i < v[nod].size(); ++i)
    {
        int vecin = v[nod][i];
        if(vecin == dad)
            continue;
        dfs(nod, vecin);
        he.push_back(height[nod]);
    }
    sort(he.begin(), he.end());
    if(he.size())
        he.pop_back();
    if(he.size())
        height[nod] += he.back();
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> k;
    if(k * k >= n)
    {
        cout << "DA\n";
        return 0;
    }
    for(int i = 1; i < n; ++i)
    {
        int a, b;
        cin >> a >> b;
        v[a].pb(b);
        v[b].pb(a);
    }
    dfs(0, 1);
    cout << (height[1] <= k ? "DA" : "NE");
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

burza.cpp: In function 'void dfs(int, int)':
burza.cpp:46:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0; i < v[nod].size(); ++i)
                    ~~^~~~~~~~~~~~~~~

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