제출 #295623

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
295623		zoooma13	늑대인간 (IOI18_werewolf)	C++14	0 / 100	396 ms	30704 KiB

werewolf

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

vector <vector <int>> adj;
vector <int> a ,pos;
int gt(int u ,int p=-1){
    a.push_back(u);
    if(adj[u].size() == 1 && ~p)
        return u;
    if(adj[u][0] != p)
        return gt(adj[u][0] ,u);
    return gt(adj[u][1] ,u);
}

int getlastzero(int l ,int r ,int q){
    for(int i=r; i>=l; i--) if(a[i] > q)
        return i;
    return -1;
}
int getfirsttwo(int l ,int r ,int q){
    for(int i=l; i<=r; i++) if(a[i] < q)
        return i;
    return -1;
}

int ex ,pl ,pr;
bool vis[2][3000];
bool go(int u ,bool st=0){
    vis[st][u] = 1;
    if(pl <= u && u <= pr && ~st && !vis[1][u] && go(u ,1))
        return 1;
    if(st && u > pr) return 0;
    if(!st && u < pl) return 0;
    if(u == ex) return 1;
    vis[st][u] = 1;
    for(int&v : adj[u]) if(!vis[st][v] && go(v ,st))
        return 1;
    return 0;
}

vector<int> check_validity(int N, vector<int> X, vector<int> Y,vector<int> S, vector<int> E,vector<int> L, vector<int> R) {
    assert(X.size() == N-1 || N <= 3000);
    adj.resize(N);
    for(int i=0; i<X.size(); i++){
        adj[X[i]].push_back(Y[i]);
        adj[Y[i]].push_back(X[i]);
    }
    if(X.size() != N-1){
        vector <int> ret(R.size());
        for(int q = 0; q < R.size(); q++){
            ex = E[q] ,pl = L[q] ,pr = R[q];
            memset(vis ,0 ,sizeof vis);
            ret[q] = go(S[q]);
        }
        return ret;
    }

    int lf = gt(0); a.clear(); gt(lf);

    pos.resize(N);
    for(int i=0; i<N; i++)
        pos[a[i]] = i ,printf("%d ",a[i]);
    printf("\n");
    ///bld

    vector <int> ret(R.size());
    for(int q = 0; q < R.size(); q++){
        int l = pos[S[q]] ,r = pos[E[q]];
        if(r < l) continue;
        if(R[q] < a[l] || a[r] < L[q]) { ret[q] = 0; continue; }

        int last0 = getlastzero(l ,r ,L[q]);
        int first2 = getfirsttwo(l ,r ,R[q]);
        ret[q] = (~last0 && ~first2? last0+1 < first2 : 1);
    }

    reverse(a.begin() ,a.end());
    for(int i=0; i<N; i++)
        pos[a[i]] = i;
    ///bld

    for(int q = 0; q < R.size(); q++){
        int l = pos[S[q]] ,r = pos[E[q]];
        if(r < l) continue;
        if(R[q] < a[l] || a[r] < L[q]) { ret[q] = 0; continue; }

        int last0 = getlastzero(l ,r ,L[q]);
        int first2 = getfirsttwo(l ,r ,R[q]);
        ret[q] = (~last0 && ~first2? last0+1 < first2 : 1);
    }

    return ret;
}

컴파일 시 표준 에러 (stderr) 메시지

werewolf.cpp: In function 'bool go(int, bool)':
werewolf.cpp:31:31: warning: '~' on an expression of type bool [-Wbool-operation]
   31 |     if(pl <= u && u <= pr && ~st && !vis[1][u] && go(u ,1))
      |                               ^~
werewolf.cpp:31:31: note: did you mean to use logical not ('!')?
In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from werewolf.cpp:1:
werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:43:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   43 |     assert(X.size() == N-1 || N <= 3000);
      |            ~~~~~~~~~^~~~~~
werewolf.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i=0; i<X.size(); i++){
      |                  ~^~~~~~~~~
werewolf.cpp:49:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   49 |     if(X.size() != N-1){
      |        ~~~~~~~~~^~~~~~
werewolf.cpp:51:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for(int q = 0; q < R.size(); q++){
      |                        ~~^~~~~~~~~~
werewolf.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int q = 0; q < R.size(); q++){
      |                    ~~^~~~~~~~~~
werewolf.cpp:83:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |     for(int q = 0; q < R.size(); q++){
      |                    ~~^~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 8
• Subtask 3: 0 / 34
• Subtask 4: 0 / 51