제출 #469266

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
469266		Carmel_Ab1	Building Skyscrapers (CEOI19_skyscrapers)	C++17	8 / 100	399 ms	21584 KiB

skyscrapers

#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//using namespace __gnu_pbds;
using namespace std;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld, ld> pld;

//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T>
ostream &operator<<(ostream &os, vector<T> &a) {
    os << "[";
    for (int i = 0; i < ll(a.size()); i++) { os << a[i] << ((i != ll(a.size() - 1) ? " " : "")); }
    os << "]\n";
    return os;
}

#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map

template<typename T1, typename T2>
istream &operator>>(istream &is, pair<T1, T2> &p) {
    is >> p.first >> p.second;
    return is;
}

template<typename T1, typename T2>
ostream &operator<<(ostream &os, pair<T1, T2> &p) {
    os << "" << p.first << " " << p.second << "";
    return os;
}

void usaco(string taskname) {
    string fin = taskname + ".in";
    string fout = taskname + ".out";
    const char *FIN = fin.c_str();
    const char *FOUT = fout.c_str();
    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);
}

template<typename T>
void read(vector<T> &v) {
    int n = v.size();
    for (int i = 0; i < n; i++)
        cin >> v[i];
}

template<typename T>
vector<T> UNQ(vector<T> a) {
    vector<T> ans;
    for (T t:a)
        if (ans.empty() || t != ans.back())
            ans.push_back(t);
    return ans;
}

ll ceil(ll a, ll b) {
    ll ans = a / b;
    if (a % b)ans++;
    return ans;
}

ld log(ld a, ld b) { return log(b) / log(a); }

ll power(ll base, ll exp, ll M = 1e18) {//(base^exp)%M
    ll ans = 1;
    while (exp) {
        if (exp % 2 == 1)ans = ((ans % M) * (base % M)) % M;
        base = ((base % M) * (base % M)) % M;
        exp /= 2;
    }
    return ans;
}

string to_base(int n, int new_base) {
    string s;
    int nn = n;
    while (nn) {
        s += to_string(nn % new_base);
        nn /= new_base;
    }
    reverse(all(s));
    return s;
}

ll gcd(ll a, ll b) {
    if (a < b)swap(a, b);
    if (b == 0)return a;
    return gcd(b, a % b);
}

ll lcm(ll a, ll b) {
    ll x = (a / gcd(a, b));
    return b * x;
}

vl generate_array(ll n, ll mn = 1, ll mx = 1e18 + 1) {
    if (mx == 1e18 + 1)
        mx = n;
    vl ans(n);
    for (int i = 0; i < n; i++)
        ans[i] = (mn + rand() % (mx - mn + 1));
    return ans;
}

string substr(string s, int l, int r) {
    string ans;
    for (int i = l; i <= r; i++)
        ans += s[i];
    return ans;
}


void solve();

int main() {
    GLHF;
    int t = 1;
    //cin >> t;
    while (t--)
        solve();
}

umap<int,umap<int,bool>>vis,has;
umap<int,umap<int,int>>ix;
void dfs1(int i,int j){
    if(!has[i][j] || vis[i][j])
        return;
    vis[i][j]=1;
    for(int dx:{-1,0,1})
        for(int dy:{-1,0,1})
            if(dx || dy)
                dfs1(i+dx,j+dy);
}
queue<pl> out;
void dfs2(int i,int j){
    if(!has[i][j] || vis[i][j])
        return;
    vis[i][j]=1;
    int cnt=0;
    for(int dx:{-1,0,1})
        for(int dy:{-1,0,1})
            if((dx==0)^(dy==0) && !has[i+dx][j+dy])
                cnt++;
    if(cnt)
        out.push({i,j});
    for(int dx:{-1,0,1})
        for(int dy:{-1,0,1})
            if(dx || dy)
                dfs2(i+dx,j+dy);
}

vl ans;
void dfs3(int i,int j){
    if(!has[i][j] || vis[i][j])
        return;
    vis[i][j]=1;
    ans.pb(ix[i][j]);
    for(int dx:{-1,0,1})
        for(int dy:{-1,0,1})
            if(dx || dy)
                dfs3(i+dx,j+dy);
}

void solve() {
    int n,t;
    cin >> n >> t;
    vpl a(n);
    read(a);

    for(int i=0; i<n; i++)
        has[a[i].first][a[i].second]=1,ix[a[i].first][a[i].second]=i+1;
    dfs1(a[0].first,a[0].second);
    for(int i=0; i<n ;i++)
        if(!vis[a[i].first][a[i].second])NO
    cout << "YES\n";

    vis.clear();
    dfs2(a[0].first,a[0].second);
    vis.clear();

    pl lst;
    while(out.size()){
        pl src=out.front();
        out.pop();

        ll i=src.first,j=src.second;
        if(vis[i][j])
            continue;
        vis[i][j]=1;
        lst={i,j};
        for(int dx:{-1,0,1})
            for(int dy:{-1,0,1})
                if((dx || dy) && has[i+dx][j+dy] && !vis[i+dx][j+dy])
                    out.push({i+dx,j+dy});
    }
    vis.clear();
    dfs3(lst.first,lst.second);
    print(ans)
}

컴파일 시 표준 에러 (stderr) 메시지

skyscrapers.cpp: In function 'void usaco(std::string)':
skyscrapers.cpp:56:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |     freopen(FIN, "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~
skyscrapers.cpp:57:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |     freopen(FOUT, "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 12
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 10
• Subtask 7: 0 / 19