Submission #871911

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
871911	2023-11-11T20:46:46 Z	Ludissey	Catfish Farm (IOI22_fish)	C++17	Compilation error	0 ms	0 KB

fish

#include "fish.h"
#include <bits/stdc++.h>
#define int long long
using namespace std;
map<pair<int,int>, int> a;
vector<vector<int>> fsh;

map<pair<int,pair<int,int>>, int> memo;
int N,M;
int dp(int x, int last, int lastlast){
  if(memo.find({x,{last,lastlast}})!=memo.end()) return memo[{x,{last,lastlast}}];
  if(x==N) return 0;
 
  memo[{x,{last,lastlast}}] = 0;
  for (auto i:fsh[x])
  {
    int c=dp(x+1, i, last);
    if(x>0) for (int y = last; y < max(i,lastlast); y++) c+=a[{x-1,y}];
    if(x==N-1) for (int y = i; y < last; y++) c+=a[x][y];
    memo[{x,{last,lastlast}}]=max(c, memo[{x,{last,lastlast}}]);
  }
  return memo[{x,{last,lastlast}}];
}
 
long long max_weights(signed n, signed m, std::vector<signed> X, std::vector<signed> Y, std::vector<signed> W) {
  N=n; M=m; 
  fsh.resize(N+1, vector<int>(1,0));
  for (int i = 0; i < M; i++){
    a[{X[i],Y[i]}] = W[i];
    fsh[X[i]+1].push_back(Y[i]+1);
    if(X[i]>0) fsh[X[i]-1].push_back(Y[i]+1);
  }
  for (int i = 0; i < N; i++) sort(fsh[i].begin(),fsh[i].end());
  
  int p=dp(0,0,0);
  return p;
}

Compilation message

fish.cpp: In function 'long long int dp(long long int, long long int, long long int)':
fish.cpp:19:51: error: no match for 'operator[]' (operand types are 'std::map<std::pair<long long int, long long int>, long long int>' and 'long long int')
   19 |     if(x==N-1) for (int y = i; y < last; y++) c+=a[x][y];
      |                                                   ^
In file included from /usr/include/c++/10/map:61,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:81,
                 from fish.cpp:2:
/usr/include/c++/10/bits/stl_map.h:492:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](const key_type&) [with _Key = std::pair<long long int, long long int>; _Tp = long long int; _Compare = std::less<std::pair<long long int, long long int> >; _Alloc = std::allocator<std::pair<const std::pair<long long int, long long int>, long long int> >; std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type = long long int; std::map<_Key, _Tp, _Compare, _Alloc>::key_type = std::pair<long long int, long long int>]'
  492 |       operator[](const key_type& __k)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_map.h:492:34: note:   no known conversion for argument 1 from 'long long int' to 'const key_type&' {aka 'const std::pair<long long int, long long int>&'}
  492 |       operator[](const key_type& __k)
      |                  ~~~~~~~~~~~~~~~~^~~
/usr/include/c++/10/bits/stl_map.h:512:7: note: candidate: 'std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type& std::map<_Key, _Tp, _Compare, _Alloc>::operator[](std::map<_Key, _Tp, _Compare, _Alloc>::key_type&&) [with _Key = std::pair<long long int, long long int>; _Tp = long long int; _Compare = std::less<std::pair<long long int, long long int> >; _Alloc = std::allocator<std::pair<const std::pair<long long int, long long int>, long long int> >; std::map<_Key, _Tp, _Compare, _Alloc>::mapped_type = long long int; std::map<_Key, _Tp, _Compare, _Alloc>::key_type = std::pair<long long int, long long int>]'
  512 |       operator[](key_type&& __k)
      |       ^~~~~~~~
/usr/include/c++/10/bits/stl_map.h:512:29: note:   no known conversion for argument 1 from 'long long int' to 'std::map<std::pair<long long int, long long int>, long long int>::key_type&&' {aka 'std::pair<long long int, long long int>&&'}
  512 |       operator[](key_type&& __k)
      |                  ~~~~~~~~~~~^~~