oj.uz

답안 #242329

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242329 2020-06-27T08:55:29 Z dantoh000 Magic Tree (CEOI19_magictree) C++14
14 / 100
 83 ms 7800 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n,m,k;
int p[100005];
vector<int> G[100005];
int a[100005];
int L[100005];
int V[100005][2];
ll dp[100005][2];
bool isline = 1;
long long LEAFANS = 0;
void dfs(int u){
    dp[u][0] = dp[u][1] = 0;
    for (auto v: G[u]){
        dfs(v);
        dp[u][0] += dp[v][0];
        dp[u][1] += dp[v][1];
    }
    dp[u][0] += V[u][0];
    dp[u][1] += V[u][1];
    dp[u][0] = max(dp[u][0],dp[u][1]);
}
int main(){
    scanf("%d%d%d",&n,&m,&k);
    for (int i = 2; i <= n; i++){
        scanf("%d",&p[i]);
        G[p[i]].push_back(i);
        if (p[i] != i-1) isline = false;
    }
    for (int i = 0; i < m; i++){
        int v,d,w;
        scanf("%d%d%d",&v,&d,&w);
        a[v] = d;
        LEAFANS += w;
        V[v][d-1] += w;
    }
    if (k <= 2){
        dfs(1);
        printf("%lld\n",dp[1][0]);
    }
    else if (isline){
        int ans = 0;
        for (int i = 0; i <= n; i++) L[i] = 1000000005;
        for (int i = n; i >= 1; i--){
            if (a[i] == 0) continue;
            int pos = upper_bound(L,L+ans,a[i])-L;
            //printf("%d goes %d\n",a[i],pos);
            L[pos] = a[i];
            ans = max(ans,pos+1);
        }
        printf("%d\n",ans);
    }
    else printf("%lld\n",LEAFANS);
}

Compilation message

magictree.cpp: In function 'int main()':
magictree.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&m,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
magictree.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&p[i]);
         ~~~~~^~~~~~~~~~~~
magictree.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&v,&d,&w);
         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 50 ms 6112 KB Output is correct
2 Correct 38 ms 6264 KB Output is correct
3 Correct 68 ms 5320 KB Output is correct
4 Correct 62 ms 5104 KB Output is correct
5 Correct 65 ms 5368 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 2816 KB Output is correct
2 Correct 7 ms 2688 KB Output is correct
3 Correct 7 ms 2816 KB Output is correct
4 Correct 57 ms 7800 KB Output is correct
5 Correct 64 ms 7464 KB Output is correct
6 Correct 64 ms 7720 KB Output is correct

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 83 ms 7416 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 13 ms 3560 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 2688 KB Output isn't correct
2 Halted 0 ms 0 KB -