제출 #367508

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
367508		cpp219	Uzastopni (COCI15_uzastopni)	C++14	160 / 160	104 ms	25452 KiB

uzastopni

#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 1e4 + 9;
const ll inf = 1e9 + 7;
typedef pair<int,int> LL;
vector<ll> g[N],q[N];
ll n,v[N],x,y;
bitset<110> flag[N][110];
vector<LL> s[N];
void DFS(ll u){
    for (auto i : g[u]) DFS(i);
    for (ll i = 1;i <= 100;i++) q[i].clear();
    for (auto i : g[u]){
        for (auto j : s[i]) q[j.fs].push_back(j.sc);
    }
    for (ll l = 109;l > 0;l--){
        if (l == v[u]){
            flag[u][l] |= flag[u][l + 1]; flag[u][l].set(l);
        }
        else{
            for (auto i : q[l]){
                if (l > v[u] || i < v[u]){
                    flag[u][l] |= flag[u][i + 1]; flag[u][l].set(i);
                }
            }
        }
        for (ll i = 100;i >= l;i--) if (flag[u][l][i] == 1 && l <= v[u] && i >= v[u]) s[u].push_back({l,i});
    }
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    #define task "tst"
    if (fopen(task".INP","r")){
        freopen(task".INP","r",stdin);
        //freopen(task".OUT","w",stdout);
    }
    cin>>n;
    for (ll i = 1;i <= n;i++) cin>>v[i];
    for (ll i = 1;i < n;i++) cin>>x>>y,g[x].push_back(y);
    DFS(1); cout<<s[1].size();
}

컴파일 시 표준 에러 (stderr) 메시지

uzastopni.cpp: In function 'int main()':
uzastopni.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   40 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 160 / 160