oj.uz

Submission #295029

# Submission time Handle Problem Language Result Execution time Memory
295029 2020-09-09T12:40:11 Z thebes Inspection (POI11_ins) C++14
70 / 100
 1713 ms 131076 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];
vector<int> adj[MN], dis;
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){
    dis.push_back(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){
        dis.clear();
        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];
            }
        }
        for(auto v : dis){
            ans[n] += 2*v;
            if(!hm) mx = max(mx, v);
        }
        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:55:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   55 |     scanf("%d",&N);
      |     ~~~~~^~~~~~~~~
ins.cpp:57:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 23808 KB Output is correct
2 Correct 17 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 16 ms 23808 KB Output is correct
5 Correct 16 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 18 ms 23936 KB Output is correct
2 Correct 16 ms 23808 KB Output is correct
3 Correct 17 ms 23808 KB Output is correct
4 Correct 16 ms 23808 KB Output is correct

Subtask #3
10.0 / 10.0

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

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 25216 KB Output is correct
2 Correct 33 ms 25592 KB Output is correct
3 Correct 31 ms 26232 KB Output is correct
4 Correct 29 ms 25344 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 26232 KB Output is correct
2 Correct 46 ms 27812 KB Output is correct
3 Correct 49 ms 28536 KB Output is correct
4 Correct 43 ms 26744 KB Output is correct

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 29684 KB Output is correct
2 Correct 106 ms 33772 KB Output is correct
3 Correct 104 ms 35184 KB Output is correct
4 Correct 90 ms 30708 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 793 ms 51640 KB Output is correct
2 Correct 771 ms 63336 KB Output is correct
3 Correct 735 ms 81380 KB Output is correct
4 Correct 583 ms 58268 KB Output is correct

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1710 ms 79196 KB Output is correct
2 Correct 1663 ms 115932 KB Output is correct
3 Runtime error 1076 ms 131076 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1690 ms 79196 KB Output is correct
2 Correct 1616 ms 116060 KB Output is correct
3 Runtime error 1064 ms 131072 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1713 ms 79268 KB Output is correct
2 Correct 1624 ms 115932 KB Output is correct
3 Runtime error 1066 ms 131072 KB Execution killed with signal 9
4 Halted 0 ms 0 KB -