답안 #667770

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
667770 2022-12-02T02:44:14 Z Lobo Prize (CEOI22_prize) C++17
10 / 100
3500 ms 1002984 KB
#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

const int maxn = 1e6+10;
const int LOG = 20;

int n, k, q, t;
int pp1[maxn][LOG+1], pp2[maxn][LOG+1], tin1[maxn], tin2[maxn], withtin1[maxn], withtin2[maxn], h1[maxn], h2[maxn];
int timer1, timer2, dist1[maxn], dist2[maxn], r1, r2, p1[maxn], p2[maxn];
vector<int> g1[maxn], g2[maxn];
vector<pair<int,pair<int,int>>> g1d[maxn];
void dfstin1(int u) {
    for(int i = 1; i <= LOG; i++) {
        pp1[u][i] = pp1[pp1[u][i-1]][i-1];
    }
    tin1[u] = ++timer1;
    withtin1[tin1[u]] = u;
    for(auto v : g1[u]) {
        pp1[v][0] = u;
        h1[v] = h1[u]+1;
        dfstin1(v);
    }
}

int lca1(int u, int v) {
    if(h1[u] < h1[v]) swap(u,v);

    for(int i = LOG; i >= 0; i--) {
        if(h1[pp1[u][i]] >= h1[v]) {
            u = pp1[u][i];
        }
    }
    if(u == v) return u;

    for(int i = LOG; i >= 0; i--) {
        if(pp1[u][i] != pp1[v][i]) {
            u = pp1[u][i];
            v = pp1[v][i];
        }
    }
    return pp1[u][0];
}

void dfstin2(int u) {
    for(int i = 1; i <= LOG; i++) {
        pp2[u][i] = pp2[pp2[u][i-1]][i-1];
    }
    tin2[u] = ++timer2;
    withtin2[tin2[u]] = u;
    for(auto v : g2[u]) {
        h2[v] = h2[u]+1;
        pp2[v][0] = u;
        dfstin2(v);
    }
}

int lca2(int u, int v) {
    if(h2[u] < h2[v]) swap(u,v);

    for(int i = LOG; i >= 0; i--) {
        if(h2[pp2[u][i]] >= h2[v]) {
            u = pp2[u][i];
        }
    }
    if(u == v) return u;

    for(int i = LOG; i >= 0; i--) {
        if(pp2[u][i] != pp2[v][i]) {
            u = pp2[u][i];
            v = pp2[v][i];
        }
    }
    return pp2[u][0];
}

void dfsd1(int u, int ant) {
    int v = -1;
    int d1u, d1v;
    for(auto V : g1d[u]) if(V.fr != ant) {
        v = V.fr;
        d1u = V.sc.fr;
        d1v = V.sc.sc;
    }
    if(v == -1) return;

    int l1 = lca1(u,v);
    dist1[l1] = dist1[u]-d1u;
    dist1[v] = dist1[l1]+d1v;
    dfsd1(v,u);
}


void solve() {
    cin >> n >> k >> q >> t;
    for(int i = 1; i <= n; i++) {
        // int wtf; cin >> wtf;
        cin >> p1[i];
        if(p1[i] == -1) {
            r1 = i;
        }
        else {
            g1[p1[i]].pb(i);
        }
    }

    for(int i = 1; i <= n; i++) {
        // int wtf; cin >> wtf;
        cin >> p2[i];
        if(p2[i] == -1) {
            r2 = i;
        }
        else {
            g2[p2[i]].pb(i);
        }
    }

    pp1[r1][0] = r1; dfstin1(r1);
    pp2[r2][0] = r2; dfstin2(r2);

    vector<pair<int,int>> vrt;
    for(int i = 1; i <= k; i++) {
        vrt.pb(mp(tin2[withtin1[i]],withtin1[i]));
    }

    if(tin1[r2] > k) {
        vrt.pop_back();
        vrt.pb(mp(tin2[r2],r2));
    }

    sort(all(vrt));
    for(auto x : vrt) {
        cout << x.sc << " ";
    }cout << endl;
    // for(int i = 1; i <= k; i++) {
    //     cout << i << " ";
    // }cout << endl;
    cout.flush();
    assert(vrt[0].sc == r2);

    vector<pair<int,int>> asks;

    for(int i = 0; i+1 < vrt.size(); i++) {
        int u = vrt[i].sc;
        int v = vrt[i+1].sc;
        cout << "? " << u << " " << v << endl;
        asks.pb(mp(u,v));        
    }
    // for(int i = 1; i <= k-1; i++) {
    //     cout << "? " << i << " " << i+1 << endl;
    // }
    cout << "!" << endl;
    cout.flush();
    // for(int i = 1; i <= k-1; i++) {
    //     int x; cin >> x >> x >> x >> x;
    // }

    for(int i = 1; i <= n; i++) dist1[i] = -1;
    for(int i = 1; i <= n; i++) dist2[i] = -1;
    dist2[r2] = 0;

    for(int i = 0; i < asks.size(); i++) {
        int u = asks[i].fr;
        int v = asks[i].sc;
        int l2 = lca2(u,v);
        int d1u, d1v, d2u, d2v;
        cin >> d1u >> d1v >> d2u >> d2v;

        dist2[l2] = dist2[u]-d2u;
        dist2[v] = dist2[l2]+d2v;

        g1d[u].pb(mp(v,mp(d1u,d1v)));
        g1d[v].pb(mp(u,mp(d1v,d1u)));
    }

    dist1[r1] = 0;
    dfsd1(r1,-1);

    vector<pair<int,int>> ans;
    for(int i = 1; i <= t; i++) {
        int u,v; cin >> u >> v;
        assert(dist2[lca2(u,v)] != -1);
        assert(dist2[v] != -1);
        assert(dist2[u] != -1);
        assert(dist1[lca1(u,v)] != -1);
        assert(dist1[v] != -1);
        assert(dist1[u] != -1);
        ans.pb(mp(dist1[u]+dist1[v]-2*dist1[lca1(u,v)],dist2[u]+dist2[v]-2*dist2[lca2(u,v)]));
    }

    for(int i = 1; i <= t; i++) {
        // int u,v; cin >> u >> v;
        // cout << dist1[u]+dist1[v]-2*dist1[lca1(u,v)] << " " << dist2[u]+dist2[v]-2*dist2[lca2(u,v)] << endl;
        cout << ans[i-1].fr << " " << ans[i-1].sc << endl;
    }
    cout.flush();
}

int32_t main() {
    // ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    int tt = 1;
    // cin >> tt;
    while(tt--) {
        solve();
    }
    return 0;

}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:152:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  152 |     for(int i = 0; i+1 < vrt.size(); i++) {
      |                    ~~~~^~~~~~~~~~~~
Main.cpp:171:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  171 |     for(int i = 0; i < asks.size(); i++) {
      |                    ~~^~~~~~~~~~~~~
# 결과 실행 시간 메모리 Grader output
1 Correct 1820 ms 337476 KB Output is correct
2 Correct 1968 ms 340760 KB Output is correct
3 Correct 1355 ms 302668 KB Output is correct
4 Correct 1277 ms 301292 KB Output is correct
5 Correct 1356 ms 304528 KB Output is correct
6 Correct 1843 ms 310584 KB Output is correct
7 Correct 1767 ms 310424 KB Output is correct
8 Correct 1827 ms 309940 KB Output is correct
9 Correct 1352 ms 302392 KB Output is correct
10 Correct 1410 ms 304080 KB Output is correct
11 Correct 1337 ms 300520 KB Output is correct
12 Correct 1335 ms 303572 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Runtime error 1785 ms 655536 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Runtime error 1420 ms 647244 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Runtime error 3115 ms 944636 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -
# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3520 ms 1002984 KB Time limit exceeded
2 Halted 0 ms 0 KB -