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답안 #637914

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
637914 2022-09-03T14:44:27 Z Cross_Ratio Reconstruction Project (JOI22_reconstruction) C++14
31 / 100
 5000 ms 42880 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e18;
ll A[100005];
ll B[100005];
ll C[100005]; // C[i] <= x < C[i+1], ans = x * A[i] + B[i];
typedef pair<ll, ll> P;
ll dis[505][505];
ll dis2[505][505];
struct UnionFind {
    vector<int> root;
    UnionFind(int n) {
        root.resize(n);
        fill(root.begin(),root.end(),-1);
    }
    int Find(int n) {
        if(root[n]<0) return n;
        int r = Find(root[n]);
        root[n] = r;
        return r;
    }
    void Merge(int x, int y) {
        x = Find(x), y = Find(y);
        if(x==y) return;
        if(root[x]>root[y]) swap(x, y);
        root[x] += root[y];
        root[y] = x;
    }
};
vector<array<ll, 4>> Tree[100005];
vector<set<array<ll, 4>>> adj;
array<ll, 4> Edge[100005];
bool S[100005];
void dfs(int c, int p, int rt) {
    for(auto n2 : adj[c]) {
        if(n2[0]==p) continue;
        dis[rt][n2[0]] = dis[rt][c];
        dis2[rt][n2[0]] = dis2[rt][c];
        if(dis[rt][n2[0]] > n2[1]) {
            dis[rt][n2[0]] = n2[1];
            dis2[rt][n2[0]] = n2[2];
        }
        dfs(n2[0], c, rt);
    }
}
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int N, M;
    cin >> N >> M;
    adj.resize(N);
    int i, j;
    for(i=0;i<M;i++) {
        int a, b, c;
        cin >> a>>b>>c;
        Edge[i] = {c, a-1, b-1, i};
    }
    sort(Edge, Edge+M);
    UnionFind UF(N);
  bool isSame = false;
    for(i=0;i<M;i++) {
        Edge[i][3] = i;
        if(UF.Find(Edge[i][1])==UF.Find(Edge[i][2])) continue;
        UF.Merge(Edge[i][1], Edge[i][2]);
        Tree[0].push_back(Edge[i]);
        S[i] = true;
        adj[Edge[i][1]].insert({Edge[i][2], Edge[i][0], i});
        adj[Edge[i][2]].insert({Edge[i][1], Edge[i][0], i});
    }
    int cnt = 0;
    ll time = 0;
    C[cnt] = 0;
    for(auto it : Tree[0]) {
        A[0]--;
        B[0] += it[0];
    }
    ll id = -2, ti = INF, id2 = -2;
    while(true) {
        cnt++;
        int i, j;
      if(!isSame) {
          for(i=0;i<N;i++) {
              for(j=0;j<N;j++) dis[i][j] = INF;
          }
          for(i=0;i<N;i++) {
              dfs(i, -1, i);
          }
      }
        if(id==-2) {
            id = -1, ti = INF, id2 = -1;
            for(i=0;i<M;i++) {
                if(!S[i]) {
                    ll mi = dis[Edge[i][1]][Edge[i][2]];
                    if(mi < Edge[i][0] && time < Edge[i][0]) {
                        ll t2 = (mi+Edge[i][0]+1)/2;
                        if(time > t2) continue;
                        if(t2 < ti) {
                            ti = t2;
                            id = i;
                            id2 = dis2[Edge[i][1]][Edge[i][2]];
                        }
                    }
                }
            }
        }
        ll t3 = INF;
        for(auto it : Tree[cnt-1]) {
            if(it[0]>time) t3 = min(t3, it[0]);
        }
        if(t3 != INF && t3 < ti) {
            C[cnt] = t3;
            Tree[cnt] = Tree[cnt-1];
            time = t3;
            for(auto it : Tree[cnt-1]) {
                if(it[0]<=time) {
                    A[cnt]++;
                    B[cnt] -= it[0];
                }
                else {
                    A[cnt]--;
                    B[cnt] += it[0];
                }
            }
            //cout << C[cnt] << " : " << A[cnt] << ' '<< B[cnt] << '\n';
          isSame = true;
            time = t3;
            continue;
        }
        if(id==-1) {
            C[cnt] = INF;
            break;
        }
        C[cnt] = ti;
        S[id] = true;
        S[id2] = false;
        adj[Edge[id2][1]].erase({Edge[id2][2], Edge[id2][0], id2});
        adj[Edge[id2][2]].erase({Edge[id2][1], Edge[id2][0], id2});
        adj[Edge[id][1]].insert({Edge[id][2], Edge[id][0], id});
        adj[Edge[id][2]].insert({Edge[id][1], Edge[id][0], id});
        for(auto it : Tree[cnt-1]) {
            if(it[3]!=id2) Tree[cnt].push_back(it);
        }
        Tree[cnt].push_back(Edge[id]);
        time = ti;
        for(auto it : Tree[cnt]) {
            //cout << it[0] << ' ' << it[1] << ' ' << it[2] << ' ' << it[3] << '\n';
            if(it[0]<=time) {
                A[cnt]++;
                B[cnt] -= it[0];
            }
            else {
                A[cnt]--;
                B[cnt] += it[0];
            }
        }
        id = -2;
        ti = INF;
        id2 = -2;
      isSame = false;
        //cout << C[cnt] << " : " << A[cnt] << ' '<< B[cnt] << '\n';
    }
    for(i=0;i<=cnt;i++) {
        //cout << C[i] << " : " << A[i] <<' ' << B[i] << '\n';
    }
    int Q;
    cin >> Q;
    int ct = 0;
    while(Q--) {
        ll x;
        cin >> x;
        while(x>=C[ct+1]) ct++;
        ll ans = 0;
        cout << x * A[ct] + B[ct] << '\n';
    }
}

Compilation message

reconstruction.cpp: In function 'int main()':
reconstruction.cpp:174:12: warning: unused variable 'ans' [-Wunused-variable]
  174 |         ll ans = 0;
      |            ^~~
reconstruction.cpp:54:12: warning: unused variable 'j' [-Wunused-variable]
   54 |     int i, j;
      |            ^

Subtask #1
3.0 / 3.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2772 KB Output is correct
6 Correct 2 ms 2792 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 1 ms 2656 KB Output is correct
13 Correct 2 ms 2712 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct

Subtask #2
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2772 KB Output is correct
6 Correct 2 ms 2792 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 1 ms 2656 KB Output is correct
13 Correct 2 ms 2712 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 2 ms 2772 KB Output is correct
20 Execution timed out 5024 ms 38936 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 2 ms 2644 KB Output is correct
4 Execution timed out 5046 ms 42460 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2772 KB Output is correct
6 Correct 2 ms 2792 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 1 ms 2656 KB Output is correct
13 Correct 2 ms 2712 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 3 ms 2772 KB Output is correct
20 Correct 3110 ms 42852 KB Output is correct
21 Correct 3183 ms 42880 KB Output is correct
22 Correct 2995 ms 42756 KB Output is correct
23 Correct 2986 ms 42872 KB Output is correct
24 Correct 3023 ms 42752 KB Output is correct
25 Correct 3070 ms 42660 KB Output is correct
26 Correct 3085 ms 34536 KB Output is correct
27 Correct 3104 ms 27160 KB Output is correct
28 Correct 3098 ms 42760 KB Output is correct
29 Correct 3107 ms 42708 KB Output is correct
30 Correct 3176 ms 42684 KB Output is correct
31 Correct 3118 ms 42868 KB Output is correct
32 Correct 210 ms 19560 KB Output is correct
33 Correct 3008 ms 42788 KB Output is correct

Subtask #5
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2772 KB Output is correct
6 Correct 2 ms 2792 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 1 ms 2656 KB Output is correct
13 Correct 2 ms 2712 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 2 ms 2772 KB Output is correct
20 Execution timed out 5024 ms 38936 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 2 ms 2772 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2772 KB Output is correct
6 Correct 2 ms 2792 KB Output is correct
7 Correct 2 ms 2772 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 1 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 1 ms 2656 KB Output is correct
13 Correct 2 ms 2712 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 1 ms 2644 KB Output is correct
16 Correct 1 ms 2644 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 2 ms 2772 KB Output is correct
20 Execution timed out 5024 ms 38936 KB Time limit exceeded
21 Halted 0 ms 0 KB -