Submission #547385

#	Time	Username	Problem	Language	Result	Execution time	Memory
547385		duality	Jail (JOI22_jail)	C++17	100 / 100	2195 ms	199044 KiB

jail

#define DEBUG 0

#include <bits/stdc++.h>
using namespace std;

#if DEBUG
// basic debugging macros
int __i__,__j__;
#define printLine(l) for(__i__=0;__i__<l;__i__++){cout<<"-";}cout<<endl
#define printLine2(l,c) for(__i__=0;__i__<l;__i__++){cout<<c;}cout<<endl
#define printVar(n) cout<<#n<<": "<<n<<endl
#define printArr(a,l) cout<<#a<<": ";for(__i__=0;__i__<l;__i__++){cout<<a[__i__]<<" ";}cout<<endl
#define print2dArr(a,r,c) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<a[__i__][__j__]<<" ";}cout<<endl;}
#define print2dArr2(a,r,c,l) cout<<#a<<":\n";for(__i__=0;__i__<r;__i__++){for(__j__=0;__j__<c;__j__++){cout<<setw(l)<<setfill(' ')<<a[__i__][__j__]<<" ";}cout<<endl;}

// advanced debugging class
// debug 1,2,'A',"test";
class _Debug {
    public:
        template<typename T>
        _Debug& operator,(T val) {
            cout << val << endl;
            return *this;
        }
};
#define debug _Debug(),
#else
#define printLine(l)
#define printLine2(l,c)
#define printVar(n)
#define printArr(a,l)
#define print2dArr(a,r,c)
#define print2dArr2(a,r,c,l)
#define debug
#endif

// define
#define MAX_VAL 999999999
#define MAX_VAL_2 999999999999999999LL
#define EPS 1e-6
#define mp make_pair
#define pb push_back

// typedef
typedef unsigned int UI;
typedef long long int LLI;
typedef unsigned long long int ULLI;
typedef unsigned short int US;
typedef pair<int,int> pii;
typedef pair<LLI,LLI> plli;
typedef vector<int> vi;
typedef vector<LLI> vlli;
typedef vector<pii> vpii;
typedef vector<plli> vplli;

// ---------- END OF TEMPLATE ----------

int S[120000],T[120000];
vi adjList[120000];
vi adjList2[2500000];
int parent[120000][17],depth[120000],disc[120000],fin[120000],num = 0,siz[120000],heavy[120000];
int chain[120000],head[120000],csize[120000],c = 0;
int doDFS(int u,int p,int d) {
    parent[u][0] = p,depth[u] = d,siz[u] = 1,heavy[u] = -1;
    for (int v: adjList[u]) {
        if (v != p) {
            doDFS(v,u,d+1);
            siz[u] += siz[v];
            if ((heavy[u] == -1) || (siz[heavy[u]] < siz[v])) heavy[u] = v;
        }
    }
    return 0;
}
int doHLD(int u,int p) {
    chain[u] = c,disc[u] = num++;
    if (csize[c] == 0) head[c] = u;
    csize[c]++;
    if (heavy[u] != -1) doHLD(heavy[u],u);
    for (int v: adjList[u]) {
        if ((v != p) && (v != heavy[u])) c++,doHLD(v,u);
    }
    fin[u] = num;
    return 0;
}
int logn;
int lca(int u,int v) {
    int i;
    if (depth[u] < depth[v]) swap(u,v);
    for (i = logn-1; i >= 0; i--) {
        if ((parent[u][i] != -1) && (depth[parent[u][i]] >= depth[v])) u = parent[u][i];
    }
    if (u == v) return u;
    for (i = logn-1; i >= 0; i--) {
        if (parent[u][i] != parent[v][i]) u = parent[u][i],v = parent[v][i];
    }
    return parent[u][0];
}
int anc(int u,int v) {
    return ((disc[v] >= disc[u]) && (disc[v] < fin[u]));
}
int onPath(int u,int v,int w,int l) {
    if (!anc(l,w)) return 0;
    return anc(w,u) || anc(w,v);
}
vi tree1[1 << 18],tree2[1 << 18];
int node1[1 << 18],node2[1 << 18];
int update(int s,int e,int ai,int i,int u,int t) {
    if ((s > ai) || (e < ai)) return 0;
    else if (s == e) {
        if (t == 1) tree1[i].pb(u);
        else tree2[i].pb(u);
        return 0;
    }

    int mid = (s+e) / 2;
    update(s,mid,ai,2*i+1,u,t),update(mid+1,e,ai,2*i+2,u,t);
    if (t == 1) tree1[i].pb(u);
    else tree2[i].pb(u);
    return 0;
}
int build(int s,int e,int i) {
    if (s == e) {
        node1[i] = num++;
        for (int u: tree1[i]) adjList2[u].pb(node1[i]);
        node2[i] = num++;
        for (int u: tree2[i]) adjList2[node2[i]].pb(u);
        return 0;
    }

    int mid = (s+e) / 2;
    build(s,mid,2*i+1),build(mid+1,e,2*i+2);
    node1[i] = num++;
    for (int u: tree1[i]) adjList2[u].pb(node1[i]);
    node2[i] = num++;
    for (int u: tree2[i]) adjList2[node2[i]].pb(u);
    return 0;
}
int add(int s,int e,int as,int ae,int i,int u,int t) {
    if ((s > ae) || (e < as)) return 0;
    else if ((s >= as) && (e <= ae)) {
        if (t == 1) adjList2[node1[i]].pb(u);
        else adjList2[u].pb(node2[i]);
        return 0;
    }

    int mid = (s+e) / 2;
    add(s,mid,as,ae,2*i+1,u,t),add(mid+1,e,as,ae,2*i+2,u,t);
    return 0;
}
int clear(int s,int e,int i) {
    if (s == e) {
        tree1[i].clear(),tree2[i].clear();
        return 0;
    }

    int mid = (s+e) / 2;
    clear(s,mid,2*i+1),clear(mid+1,e,2*i+2);
    tree1[i].clear(),tree2[i].clear();
    return 0;
}
int visited[2500000],no = 0;
int doDFS2(int u) {
    if (visited[u] != 0) {
        if (visited[u] == 1) no = 1;
        return 0;
    }

    visited[u] = 1;
    for (int v: adjList2[u]) doDFS2(v);
    visited[u] = 2;
    return 0;
}
int main() {
    int i,j;
    int Q,N,M,A,B;
    scanf("%d",&Q);
    while (Q--) {
        scanf("%d",&N);
        for (i = 0; i < N-1; i++) {
            scanf("%d %d",&A,&B);
            A--,B--;
            adjList[A].pb(B);
            adjList[B].pb(A);
        }
        scanf("%d",&M);
        for (i = 0; i < M; i++) scanf("%d %d",&S[i],&T[i]),S[i]--,T[i]--;

        num = 0,doDFS(0,-1,0);
        doHLD(0,-1),c++;
        for (i = 1; (1 << i) < N; i++) {
            for (j = 0; j < N; j++) {
                if (parent[j][i-1] != -1) parent[j][i] = parent[parent[j][i-1]][i-1];
                else parent[j][i] = -1;
            }
        }
        logn = i;
        num = M;
        for (i = 0; i < M; i++) {
            update(0,N-1,disc[S[i]],0,i,1);
            update(0,N-1,disc[T[i]],0,i,2);
        }
        build(0,N-1,0);
        for (i = 0; i < M; i++) {
            int l = lca(S[i],T[i]);
            for (int o: {S[i],T[i]}) {
                int u = o;
                while (chain[u] != chain[l]) {
                    int s = disc[head[chain[u]]],e = disc[u];
                    if (disc[S[i]] == s) s++;
                    if (disc[S[i]] == e) e--;
                    if (s <= e) add(0,N-1,s,e,0,i,1);
                    s = disc[head[chain[u]]],e = disc[u];
                    if (disc[T[i]] == s) s++;
                    if (disc[T[i]] == e) e--;
                    if (s <= e) add(0,N-1,s,e,0,i,2);
                    add(0,N-1,s,e,0,i,2);
                    u = parent[head[chain[u]]][0];
                }
                int s = disc[l],e = disc[u];
                if (disc[S[i]] == s) s++;
                if (disc[S[i]] == e) e--;
                if (s <= e) add(0,N-1,s,e,0,i,1);
                s = disc[l],e = disc[u];
                if (disc[T[i]] == s) s++;
                if (disc[T[i]] == e) e--;
                if (s <= e) add(0,N-1,s,e,0,i,2);
            }
        }
        fill(visited,visited+num,0),no = 0;
        for (i = 0; i < num; i++) {
            if (visited[i] == 0) doDFS2(i);
        }
        if (no) printf("No\n");
        else printf("Yes\n");

        clear(0,N-1,0);
        for (i = 0; i < N; i++) adjList[i].clear();
        for (i = 0; i < num; i++) adjList2[i].clear();
    }

    return 0;
}

Compilation message (stderr)

jail.cpp: In function 'int main()':
jail.cpp:176:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  176 |     scanf("%d",&Q);
      |     ~~~~~^~~~~~~~~
jail.cpp:178:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  178 |         scanf("%d",&N);
      |         ~~~~~^~~~~~~~~
jail.cpp:180:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  180 |             scanf("%d %d",&A,&B);
      |             ~~~~~^~~~~~~~~~~~~~~
jail.cpp:185:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  185 |         scanf("%d",&M);
      |         ~~~~~^~~~~~~~~
jail.cpp:186:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  186 |         for (i = 0; i < M; i++) scanf("%d %d",&S[i],&T[i]),S[i]--,T[i]--;
      |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 16 / 16
• Subtask 4: 28 / 28
• Subtask 5: 12 / 12
• Subtask 6: 11 / 11
• Subtask 7: 23 / 23