Submission #597844

#	Time	Username	Problem	Language	Result	Execution time	Memory
597844		yanndev	The Big Prize (IOI17_prize)	C++17	Compilation error	0 ms	0 KiB

prize

#include "prize.h"
#include <bits/stdc++.h>
using namespace std;

vector<vector<int>> ans[200042];

vector<vector<int>> query(int i) {
    if (ans[i].empty())
        return ans[i] = ask(i);
    return ans[i];
}

int find_best(int n) {
    for (int i = 0; i < n; i++) {
        vector<int> a = query(i);
        if (a[0] == 0 && a[1] == 0)
            return i;
        
        int l = i;
        int r = n;
        while (l < r) {
            int m = (l + r + 1) / 2;
            vector<int> b = query(m);
            if (b[0] == a[0] && b[1] == a[1])
                l = m;
            else
                r = m - 1;
        }

		//cout << "poor range " << i << ' ' << l << '\n';
        i = l
    }
}

Compilation message (stderr)

prize.cpp: In function 'std::vector<std::vector<int> > query(int)':
prize.cpp:9:30: error: no match for 'operator=' (operand types are 'std::vector<std::vector<int> >' and 'std::vector<int>')
    9 |         return ans[i] = ask(i);
      |                              ^
In file included from /usr/include/c++/10/vector:72,
                 from prize.h:1,
                 from prize.cpp:1:
/usr/include/c++/10/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::vector<int>; _Alloc = std::allocator<std::vector<int> >]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::vector<int>' to 'const std::vector<std::vector<int> >&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/10/vector:67,
                 from prize.h:1,
                 from prize.cpp:1:
/usr/include/c++/10/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::vector<int>; _Alloc = std::allocator<std::vector<int> >]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::vector<std::vector<int> >&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = std::vector<int>; _Alloc = std::allocator<std::vector<int> >]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::vector<int>' to 'std::initializer_list<std::vector<int> >'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
prize.cpp: In function 'int find_best(int)':
prize.cpp:15:30: error: conversion from 'vector<std::vector<int>>' to non-scalar type 'vector<int>' requested
   15 |         vector<int> a = query(i);
      |                         ~~~~~^~~
prize.cpp:23:34: error: conversion from 'vector<std::vector<int>>' to non-scalar type 'vector<int>' requested
   23 |             vector<int> b = query(m);
      |                             ~~~~~^~~
prize.cpp:31:14: error: expected ';' before '}' token
   31 |         i = l
      |              ^
      |              ;
   32 |     }
      |     ~         
prize.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type]
   33 | }
      | ^