제출 #1072676

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1072676		PenguinsAreCute	Building Skyscrapers (CEOI19_skyscrapers)	C++17	22 / 100	89 ms	9600 KiB

skyscrapers

#include <bits/stdc++.h>
using namespace std;
using i2 = pair<int,int>;
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define all(v) begin(v),end(v)
#define sz(v) int(v.size())
vector<int> perm;
bitset<150005> vis;
vector<int> adj[150005];
void bfs(int x, vector<int> &r, vector<int> &c) {
  vis[x]=1;
  priority_queue<i2,vector<i2>,greater<i2>> pq;
  for(pq.push({r[x],x});pq.size();) {
    int y = pq.top().second; pq.pop();
    perm.push_back(y);
    for(auto z: adj[y]) if(!vis[z]) {
      vis[z]=1;
      pq.push({r[z],z});
    }
  }
}
struct block {int x, y, i;};
vector<int> build_skyscrapers(int t, vector<int> r, vector<int> c) {
  int n = r.size();
  block lst[n];
  for(int i=0;i<n;i++) lst[i]={r[i],c[i],i};
  auto lamb = [](block a, block b){return i2(a.x,a.y)<i2(b.x,b.y);};
  sort(lst,lst+n,lamb);
  int dx[8]={-1,-1,-1,0,0,1,1,1}, dy[8]={-1,0,1,-1,1,-1,0,1};
  for(int i=0;i<n;i++) for(int j=0;j<8;j++) {
    auto it=lb(lst,lst+n,block{r[i]+dx[j],c[i]+dy[j],0},lamb);
    if(it!=lst+n&&(*it).x==r[i]+dx[j]&&(*it).y==c[i]+dy[j]) adj[i].push_back((*it).i);
  }
  bfs(min_element(all(r))-begin(r),r,c);
  if(sz(perm)<n) return {-1};
  return perm;
}

// grader
main() {
  int n, t;
  assert(2==scanf("%d %d",&n,&t));
  vector<int> r(n), c(n);
  for(int i=0;i<n;i++) assert(2==scanf("%d %d",&r[i],&c[i]));
  vector<int> v = build_skyscrapers(t,r,c);
  if(v[0]==-1) printf("NO");
  else {
    printf("YES\n");
    for(auto i: v) printf("%d\n",i+1);
  }
}

컴파일 시 표준 에러 (stderr) 메시지

skyscrapers.cpp:43:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   43 | main() {
      | ^~~~

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