제출 #547384

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
547384		duality	Jail (JOI22_jail)	C++17	61 / 100	5067 ms	33616 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[120000];
int parent[120000][17],depth[120000],disc[120000],fin[120000],num = 0;
int doDFS(int u,int p,int d) {
    parent[u][0] = p,depth[u] = d,disc[u] = num++;
    for (int v: adjList[u]) {
        if (v != p) doDFS(v,u,d+1);
    }
    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);
}
int visited[120000],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);
        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;
        for (i = 0; i < M; i++) {
            int l = lca(S[i],T[i]);
            for (j = 0; j < M; j++) {
                if (i != j) {
                    if (onPath(S[i],T[i],S[j],l)) adjList2[j].pb(i);
                    if (onPath(S[i],T[i],T[j],l)) adjList2[i].pb(j);
                }
            }
        }
        fill(visited,visited+M,0),no = 0;
        for (i = 0; i < M; i++) {
            if (visited[i] == 0) doDFS2(i);
        }
        if (no) printf("No\n");
        else printf("Yes\n");

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

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

jail.cpp: In function 'int main()':
jail.cpp:105:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  105 |     scanf("%d",&Q);
      |     ~~~~~^~~~~~~~~
jail.cpp:107:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  107 |         scanf("%d",&N);
      |         ~~~~~^~~~~~~~~
jail.cpp:109:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |             scanf("%d %d",&A,&B);
      |             ~~~~~^~~~~~~~~~~~~~~
jail.cpp:114:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |         scanf("%d",&M);
      |         ~~~~~^~~~~~~~~
jail.cpp:115:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         for (i = 0; i < M; i++) scanf("%d %d",&S[i],&T[i]),S[i]--,T[i]--;
      |                                 ~~~~~^~~~~~~~~~~~~~~~~~~~~

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