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Submission #295032

# Submission time Handle Problem Language Result Execution time Memory
295032 2020-09-09T12:43:13 Z thebes Inspection (POI11_ins) C++14
100 / 100
 1702 ms 131072 KB 
#include <bits/stdc++.h>
using namespace std;

const int MN = 1e6+5;
int N, i, x, y, sz[MN], zs[MN], md[MN], mx[MN], idx, cur;
vector<int> adj[MN];
long long ans[MN];

int dfs(int n,int p){
    sz[n] = 1;
    for(auto v : adj[n]){
        if(v==p) continue;
        sz[n] += dfs(v, n);
        mx[n] = max(mx[n], sz[v]);
    }
    return sz[n];
}

void acc(int n,int p,int d,int r){
    ans[idx] += 2*d; cur = max(cur, d);
    md[r] = max(md[r], d);
    zs[r] ++;
    for(auto v : adj[n]){
        if(v==p) continue;
        acc(v, n, d+1, r);
    }
}

void dfs2(int n,int p){
    if(2*mx[n]<=N&&2*(N-sz[n])<=N){
        idx = n, cur = 0;
        int mx = 0, hm = 0;
        for(auto v : adj[n]){
            zs[v] = md[v] = 0;
            acc(v, n, 1, v);
            if(zs[v]>N-zs[v]-1){
                hm = 1;
                mx = md[v];
            }
        }
        if(!hm) mx = max(mx, cur);
        ans[n] -= mx;
    }
    else ans[n] = -1;
    for(auto v : adj[n]){
        if(v==p) continue;
        dfs2(v, n);
    }
}

int main(){
    scanf("%d",&N);
    for(i=1;i<N;i++){
        scanf("%d%d",&x,&y);
        adj[x].push_back(y);
        adj[y].push_back(x);
    }
    dfs(1, 0); dfs2(1, 0);
    for(i=1;i<=N;i++)
        printf("%lld\n",ans[i]);
    return 0;
}

Compilation message

ins.cpp: In function 'int main()':
ins.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   52 |     scanf("%d",&N);
      |     ~~~~~^~~~~~~~~
ins.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23808 KB Output is correct
2 Correct 17 ms 23808 KB Output is correct
3 Correct 16 ms 23808 KB Output is correct
4 Correct 16 ms 23808 KB Output is correct
5 Correct 20 ms 23808 KB Output is correct
6 Correct 16 ms 23808 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23808 KB Output is correct
2 Correct 17 ms 23936 KB Output is correct
3 Correct 16 ms 23808 KB Output is correct
4 Correct 17 ms 23808 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 23936 KB Output is correct
2 Correct 18 ms 23936 KB Output is correct
3 Correct 17 ms 24064 KB Output is correct
4 Correct 20 ms 23936 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 24960 KB Output is correct
2 Correct 31 ms 25208 KB Output is correct
3 Correct 31 ms 25472 KB Output is correct
4 Correct 29 ms 24960 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 25976 KB Output is correct
2 Correct 45 ms 26616 KB Output is correct
3 Correct 44 ms 27136 KB Output is correct
4 Correct 43 ms 25848 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 29108 KB Output is correct
2 Correct 117 ms 31736 KB Output is correct
3 Correct 112 ms 33016 KB Output is correct
4 Correct 86 ms 29048 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 816 ms 49784 KB Output is correct
2 Correct 759 ms 57392 KB Output is correct
3 Correct 711 ms 64888 KB Output is correct
4 Correct 564 ms 49288 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1685 ms 75096 KB Output is correct
2 Correct 1610 ms 90520 KB Output is correct
3 Correct 1567 ms 131072 KB Output is correct
4 Correct 1229 ms 88020 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1689 ms 75128 KB Output is correct
2 Correct 1594 ms 90720 KB Output is correct
3 Correct 1561 ms 131072 KB Output is correct
4 Correct 1214 ms 88056 KB Output is correct

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1702 ms 75128 KB Output is correct
2 Correct 1599 ms 90616 KB Output is correct
3 Correct 1570 ms 131072 KB Output is correct
4 Correct 1229 ms 88312 KB Output is correct