제출 #917106

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
917106		coding_snorlax	Jakarta Skyscrapers (APIO15_skyscraper)	C++14	57 / 100	1069 ms	26492 KiB

skyscraper

#include<bits/stdc++.h>
using namespace std;
set<pair<int,int>> s;
vector<int> List[30005];
int vis[30005]={0};
int Move[30005];
int N,M;
int answer = 50000;
void add(){
    auto now = *(s.begin());
    vis[now.second]=1;
    s.erase(s.begin());
    for(int i:List[now.second]){
        if(i==1) answer = min(answer,now.first);
        // doge M
        for(int j=now.second;j<=N;j+=Move[i]){
            if(!vis[j]) s.insert(make_pair(now.first+(j-now.second)/Move[i],j));
        }
        for(int j=now.second;j>=0;j-=Move[i]){
            if(!vis[j]) s.insert(make_pair(now.first+(now.second-j)/Move[i],j));
        }
    }
}
int main(){
    cin>>N>>M;
    int Bos;
    for(int i=0;i<M;i++){
        int tmp1,tmp2;
        cin>>tmp1>>tmp2;
        List[tmp1].push_back(i);
        Move[i]=tmp2;
        if(i==0) Bos = tmp1;
    }
    s.insert(make_pair(0,Bos));
    while((int)s.size()) add();
    if(answer!=50000) cout << answer;
    else cout << -1;

}

컴파일 시 표준 에러 (stderr) 메시지

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:34:29: warning: 'Bos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |     s.insert(make_pair(0,Bos));
      |                             ^

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 21 / 21
• Subtask 5: 0 / 43