Submission #165302

#	Time	Username	Problem	Language	Result	Execution time	Memory
165302		Segtree	Ancient Books (IOI17_books)	C++14	Compilation error	0 ms	0 KiB

books

#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
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;
    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;
	    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());
    vector<P> nv;
    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;
    ll bef=v[0].first;
    for(int i=0;i<v.size();i++){
	if(~rnd&&rnd<v[i].first){
	    v.push_back(make_pair(bef,rnd));
	    bef=v[i].first;
	    sum+=2*(v[i].first-rnd);
	}
	chmax(rnd,v[i].second);
    }
    if(th==1){
	int mi=1e9;
	for(int i=0;i<v.size();i++){
	    chmin(mi,abs(s-v[i].first));
	    chmin(mi,abs(s-v[i].second));
	}
	if(mi==1e9)return 0;
	if(mi==0)cout<<1/0<<endl;
	//sum+=mi*2;
    }
    return sum;
}

Compilation message (stderr)

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:37:12: error: 'P' was not declared in this scope
     vector<P> nv;
            ^
books.cpp:37:13: error: template argument 1 is invalid
     vector<P> nv;
             ^
books.cpp:37:13: error: template argument 2 is invalid
books.cpp:39:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~
books.cpp:41:9: error: request for member 'push_back' in 'nv', which is of non-class type 'int'
      nv.push_back(v[i]);
         ^~~~~~~~~
books.cpp:45:7: error: no match for 'operator=' (operand types are 'std::vector<std::pair<int, int> >' and 'int')
     v=nv;
       ^~
In file included from /usr/include/c++/7/vector:69:0,
                 from books.cpp:3:
/usr/include/c++/7/bits/vector.tcc:179:5: note: candidate: std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >]
     vector<_Tp, _Alloc>::
     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/7/bits/vector.tcc:179:5: note:   no known conversion for argument 1 from 'int' to 'const std::vector<std::pair<int, int> >&'
In file included from /usr/include/c++/7/vector:64:0,
                 from books.cpp:3:
/usr/include/c++/7/bits/stl_vector.h:461:7: note: candidate: std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >]
       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
       ^~~~~~~~
/usr/include/c++/7/bits/stl_vector.h:461:7: note:   no known conversion for argument 1 from 'int' to 'std::vector<std::pair<int, int> >&&'
/usr/include/c++/7/bits/stl_vector.h:482:7: note: candidate: std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = std::pair<int, int>; _Alloc = std::allocator<std::pair<int, int> >]
       operator=(initializer_list<value_type> __l)
       ^~~~~~~~
/usr/include/c++/7/bits/stl_vector.h:482:7: note:   no known conversion for argument 1 from 'int' to 'std::initializer_list<std::pair<int, int> >'
books.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<v.size();i++){
                 ~^~~~~~~~~
books.cpp:57:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v.size();i++){
              ~^~~~~~~~~
books.cpp:62:18: warning: division by zero [-Wdiv-by-zero]
  if(mi==0)cout<<1/0<<endl;
                 ~^~