oj.uz

답안 #367508

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
367508 2021-02-17T14:28:20 Z cpp219 Uzastopni (COCI15_uzastopni) C++14
160 / 160
 104 ms 25452 KB 
#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();
}

Compilation message

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
160.0 / 160.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1132 KB Output is correct
2 Correct 2 ms 1132 KB Output is correct
3 Correct 2 ms 1132 KB Output is correct
4 Correct 2 ms 1132 KB Output is correct
5 Correct 2 ms 1260 KB Output is correct
6 Correct 2 ms 1260 KB Output is correct
7 Correct 2 ms 1260 KB Output is correct
8 Correct 2 ms 1260 KB Output is correct
9 Correct 2 ms 1260 KB Output is correct
10 Correct 3 ms 1260 KB Output is correct
11 Correct 86 ms 18796 KB Output is correct
12 Correct 84 ms 18796 KB Output is correct
13 Correct 87 ms 18924 KB Output is correct
14 Correct 93 ms 25452 KB Output is correct
15 Correct 94 ms 25452 KB Output is correct
16 Correct 104 ms 25452 KB Output is correct
17 Correct 103 ms 18796 KB Output is correct
18 Correct 87 ms 18796 KB Output is correct
19 Correct 89 ms 21228 KB Output is correct
20 Correct 88 ms 21228 KB Output is correct