제출 #165315

#제출 시각아이디문제언어결과실행 시간메모리
165315Segtree고대 책들 (IOI17_books)C++14
컴파일 에러
0 ms0 KiB
#include<iostream> #include<algorithm> #include<vector> #include"books.h" using namespace std; typedef long long ll; #define chmin(a,b) a=min(a,b) #define chmax(a,b) a=max(a,b) #define N 1000010 int blg[N]; ll minimum_walk(vector<int> p,int s){ int n=p.size(); ll sum=0; for(int i=0;i<n;i++)sum+=abs(i-p[i]); if(sum==0)return 0; bool vis[N]; for(int i=0;i<n;i++)vis[i]=0; vector<pair<int,int> >v,nv; bool th=0; for(int i=0;i<n;i++){ if(vis[i])continue; ll x=i; ll mi=1e17,ma=-1e17; while(1){ chmin(mi,x); chmax(ma,x); vis[x]=1; blg[x]=i; x=p[x]; if(x==i)break; } if(mi!=ma){ v.push_back(make_pair(mi,ma)); if(mi<=s&&s<=ma)th=1; } } if(th==0)v.push_back(make_pair(s,s)); sort(v.begin(),v.end()); int rnd=-1; for(int i=0;i<v.size();i++){ if(rnd<v[i].second){ nv.push_back(v[i]); rnd=v[i].second; } } v=nv; if(th==1){ int mi=1e9; unordered_set<int> st; for(int i=0;i<v.size();i++){ st.insert(v[i].first); } for(int i=0;i<n;i++){ if(st.find(blg[i])!=st.end()){ chmin(mi,s-i); } } sum+=mi*2; } ll bef=v[0].first; rnd=-1; for(int i=0;i<v.size();i++){ if(~rnd&&rnd<v[i].first){ nv.push_back(make_pair(bef,rnd)); bef=v[i].first; sum+=2*(v[i].first-rnd); } chmax(rnd,v[i].second); } nv.push_back(make_pair(bef,rnd)); v=nv; return sum; }

컴파일 시 표준 에러 (stderr) 메시지

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~
books.cpp:50:2: error: 'unordered_set' was not declared in this scope
  unordered_set<int> st;
  ^~~~~~~~~~~~~
books.cpp:50:16: error: expected primary-expression before 'int'
  unordered_set<int> st;
                ^~~
books.cpp:51:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
              ~^~~~~~~~~
books.cpp:52:6: error: 'st' was not declared in this scope
      st.insert(v[i].first);
      ^~
books.cpp:52:6: note: suggested alternative: 's'
      st.insert(v[i].first);
      ^~
      s
books.cpp:55:9: error: 'st' was not declared in this scope
      if(st.find(blg[i])!=st.end()){
         ^~
books.cpp:55:9: note: suggested alternative: 's'
      if(st.find(blg[i])!=st.end()){
         ^~
         s
books.cpp:64:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~