Submission #778655

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
778655	2023-07-10T14:18:15 Z	benjaminkleyn	The Big Prize (IOI17_prize)	C++17	Compilation error	0 ms	0 KB

prize

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

bool asked[200000] = {false};
int L[200000], R[200000];

unorderd_map<int, set<int>> queries;

bool Ask(int i)
{
    if (asked[i]) return L[i] + R[i] == 0;
    
    asked[i] = true;
    vector<int> res = ask(i);
    L[i] = res[0], R[i] = res[1];

    if (queries.find(L[i] + R[i]) == queries.end())
        queries[L[i] + R[i]] = set<int>();
    queries[L[i] + R[i]].insert(i);

    return L[i] + R[i] == 0;
}


int Find(int l, int r)
{
    if (Ask(l)) return l;
    if (Ask(r)) return r;
    if (l + 1 == r)
        return -1;

    for (auto [x, s] : queries)
    {
        auto it1 = s.upper_bound(l), it2 = s.lower_bound(r);
        if (it1 == s.begin() || it2 == s.end()) continue;
        if (L[*prev(it1)] == L[*it2]) return -1;
    }

    int m = (l + r) / 2;

    int x = Find(l, m);
    if (x >= 0) return x;

    int y = Find(m, r);
    if (y >= 0) return y;

    return -1;
}

int find_best(int n) 
{
    return Find(0, n - 1);
}

Compilation message

prize.cpp:8:1: error: 'unorderd_map' does not name a type
    8 | unorderd_map<int, set<int>> queries;
      | ^~~~~~~~~~~~
prize.cpp: In function 'bool Ask(int)':
prize.cpp:18:9: error: 'queries' was not declared in this scope
   18 |     if (queries.find(L[i] + R[i]) == queries.end())
      |         ^~~~~~~
prize.cpp:20:5: error: 'queries' was not declared in this scope
   20 |     queries[L[i] + R[i]].insert(i);
      |     ^~~~~~~
prize.cpp: In function 'int Find(int, int)':
prize.cpp:33:24: error: 'queries' was not declared in this scope
   33 |     for (auto [x, s] : queries)
      |                        ^~~~~~~
prize.cpp:36:33: error: 'it2' was not declared in this scope
   36 |         if (it1 == s.begin() || it2 == s.end()) continue;
      |                                 ^~~
prize.cpp:37:33: error: 'it2' was not declared in this scope
   37 |         if (L[*prev(it1)] == L[*it2]) return -1;
      |                                 ^~~