Submission #1161511

#	Time	Username	Problem	Language	Result	Execution time	Memory
1161511		RiverFlow	The Big Prize (IOI17_prize)	C++20	Compilation error	0 ms	0 KiB

prize

#include <bits/stdc++.h>

#define LOCAL

#ifndef LOCAL
#include "prize.h"
#endif

#define nl "\n"
#define no "NO"
#define yes "YES"
#define fi first
#define se second
#define vec vector
#define task "main"
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)
#define unq(x) sort(all(x)); x.resize(unique(all(x)) - x.begin())

using namespace std;

template<typename U, typename V> bool maxi(U &a, V b) {
    if (a < b) { a = b; return 1; } return 0;
}
template<typename U, typename V> bool mini(U &a, V b) {
    if (a > b) { a = b; return 1; } return 0;
}

const int N = (int)2e5 + 9;
const int mod = (int)1e9 + 7;

void prepare(); void main_code();


#ifdef LOCAL
int n, a[N];
array<int, 2> ask(int i) {
    int x = 0, y = 0;
    for(int j = i - 1; j >= 0; --j) x += a[i] > a[j];
    for(int j = i + 1; j < n; ++j) y += a[i] > a[j];
    return {x, y};
}
#endif

vector<int> d[N];

int find_best(int n) {
    srand(time(NULL));
    vector<int> b(n);
    iota(all(b), 0);
    random_shuffle(all(b));

    FOR(i, 0, n - 1) d[i] = {-1, -1};

    int mx = 0, luu = -1;
    for(int i = 0; i < min(n, 500); ++i) {
        d[ b[i] ] = ask(b[i]);
        int x = d[b[i]][0] + d[b[i]][1];
        if (x == 0) return b[i];
        if (x > mx) {
            mx = x, luu = i;
        }
    }
    //chi can y ma tang len
    int x=d[luu][0], y=d[luu][1];
    int tx=x, ty=y;

    for(int i = luu; x>0; ){
        //tim vi tri tiep theo y thay doi
        int lb = 0, rb=i-1, pos=-1;
        while(lb<=rb){
            int mid=(lb+rb)>>1;
            if (d[mid][0]==-1)d[mid]=ask(mid);
            int v = d[mid][0] + d[mid][1];
            if (v == 0) return mid;
            if (v == mx) {
                if (d[mid][1] - y - (mx - (x + y)) > 0) {
                    rb=mid+1;
                }else{
                    lb=mid-1;
                }
            }else{
                pos=mid, lb=mid+1;
            }
        }
        i=pos;
        --x;
    }
    x=tx, y=ty;
    for(int i = luu; y>0; ){
        //tim vi tri tiep theo y thay doi
        int lb = i+1, rb=n-1, pos=-1;
        while(lb<=rb){
            int mid=(lb+rb)>>1;
            if (d[mid][0]==-1)d[mid]=ask(mid);
            int v = d[mid][0] + d[mid][1];
            if (v == 0) return mid;
            if (v == mx) {
                if (d[mid][0] - x - (mx - (x + y)) > 0) {
                    lb=mid-1;
                }else{
                    rb=mid+1;
                }
            }else{
                pos=mid, rb=mid-1;
            }
        }
        i=pos;
        --y;
    }
    return 0;
}

#ifdef LOCAL
int main() {
    freopen("main.inp", "r", stdin);
    cin >> n;
    for(int i = 0; i < n; ++i) cin >> a[i];
    int x = find_best(n);
    cout << x << nl;
}

#endif


/*     Let the river flows naturally     */

Compilation message (stderr)

prize.cpp: In function 'int find_best(int)':
prize.cpp:62:29: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'std::array<int, 2>')
   62 |         d[ b[i] ] = ask(b[i]);
      |                             ^
In file included from /usr/include/c++/11/vector:72,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'const std::vector<int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/vector:67,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::vector<int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/11/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::initializer_list<int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
prize.cpp:78:45: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'std::array<int, 2>')
   78 |             if (d[mid][0]==-1)d[mid]=ask(mid);
      |                                             ^
In file included from /usr/include/c++/11/vector:72,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'const std::vector<int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/vector:67,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::vector<int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/11/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::initializer_list<int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
prize.cpp:100:45: error: no match for 'operator=' (operand types are 'std::vector<int>' and 'std::array<int, 2>')
  100 |             if (d[mid][0]==-1)d[mid]=ask(mid);
      |                                             ^
In file included from /usr/include/c++/11/vector:72,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/vector.tcc:198:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  198 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/11/bits/vector.tcc:199:42: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'const std::vector<int>&'
  199 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/11/vector:67,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from prize.cpp:1:
/usr/include/c++/11/bits/stl_vector.h:709:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:709:26: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::vector<int>&&'
  709 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/11/bits/stl_vector.h:730:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>]'
  730 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:730:46: note:   no known conversion for argument 1 from 'std::array<int, 2>' to 'std::initializer_list<int>'
  730 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
prize.cpp: In function 'int main()':
prize.cpp:121:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |     freopen("main.inp", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~