Submission #446230

#	Time	Username	Problem	Language	Result	Execution time	Memory
446230		qwerasdfzxcl	Building Skyscrapers (CEOI19_skyscrapers)	C++14	54 / 100	390 ms	15864 KiB

skyscrapers

#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
set<pair<int, int>> st;
int dx[8] = {1, 1, 1, 0, 0, -1, -1, -1}, dy[8] = {1, 0, -1, 1, -1, 1, 0, -1};
pair<int, int> a[150150];
map<pair<int, int>, int> mp;
bool visited[150150];

int main(){
    int n, t;
    scanf("%d %d", &n, &t);
    for (int i=0;i<n;i++){
        scanf("%d %d", &a[i].first, &a[i].second);
        mp[a[i]] = i;
    }
    auto iter = min_element(a, a+n);
    st.insert(*iter); visited[iter-a] = 1;
    vector<int> ans;
    while(!st.empty()){
        auto p = *st.begin(); st.erase(st.begin());
        ans.push_back(mp[p]);
        for (int k=0;k<8;k++){
            int nx = p.first + dx[k], ny = p.second + dy[k];
            if (mp.find(make_pair(nx, ny))!=mp.end()){
                pair<int, int> tmp = {nx, ny};
                if (!visited[mp[tmp]]){
                    st.insert(tmp);
                    visited[mp[tmp]] = 1;
                }
            }
        }
    }
    if ((int)ans.size()<n) printf("NO\n");
    else{
        printf("YES\n");
        for (auto &x:ans) printf("%d\n", x+1);
    }
    return 0;
}

Compilation message (stderr)

skyscrapers.cpp: In function 'int main()':
skyscrapers.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     scanf("%d %d", &n, &t);
      |     ~~~~~^~~~~~~~~~~~~~~~~
skyscrapers.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf("%d %d", &a[i].first, &a[i].second);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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