Submission #1258082

#TimeUsernameProblemLanguageResultExecution timeMemory
1258082_rain_Drvca (COCI19_drvca)C++20
0 / 110
17 ms2372 KiB
#include<bits/stdc++.h> using namespace std; typedef long long LL; #define FOR(i,a,b) for(int i = (a) , _b = (b); i <= _b; ++i) #define BIT(maks , x) (((mask) >> (x)) & (1)) #define MASK(x) ((LL)(1)<<(x)) template<class X,class Y> bool maximize(X &x , Y y){ if (x < y) return x = y , true; else return false; } template<class X,class Y> bool minimize(X &x,Y y){ if (x > y) return x = y , true; else return false; } const int N = (int) 1e5; int h[N + 2]; bool mark[N + 2] = {}; int n; bool check_possible(vector<int>&data){ if (data.size() < 3) return true; for(int i = 2; i < data.size(); ++i) if (h[data[i]] - h[data[i - 1]] != h[data[i - 1]] - h[data[i - 2]]) return false; return true; } bool check(int id1 , int id2){ vector<int>v; for(int i = 1; i <= n; ++i) mark[i] = false; v.push_back(id1) , v.push_back(id2); int cur_sz = 1; for(int i = id2 + 1; i <= n; ++i) { if (h[i] - h[v[cur_sz]] == h[v[cur_sz]] - h[v[cur_sz - 1]]) { v.push_back(i); ++cur_sz; } } for(auto& id : v) mark[id] = true; vector<int>nxt; for(int i = 1; i <= n; ++i) if (!mark[i]) nxt.push_back(i); bool ok = check_possible(nxt); if (ok){ if (nxt.size() == 0) nxt.push_back(v.back()) , v.pop_back(); cout << nxt.size() << '\n'; for(auto& x : nxt) cout << h[x] << ' '; cout << '\n'; cout << v.size() << '\n'; for(auto& x : v) cout << h[x] << ' '; cout << '\n'; } return ok; } int main(){ ios::sync_with_stdio(false); cin.tie(0) ; cout.tie(0) ; #define name "main" if (fopen(name".inp","r")){ freopen(name".inp","r",stdin); freopen(name".out","w",stdout); } cin >> n; for(int i = 1; i <= n; ++i) cin >> h[i]; sort(h+1,h+n+1); // for(int i = 1; i <= n; ++i) cout << h[i] << ' '; cout << '\n'; if (check(1,2)) return 0; if (check(1,3)) return 0; if (check(2,3)) return 0; cout << -1; return 0; }

Compilation message (stderr)

drvca.cpp: In function 'int main()':
drvca.cpp:59:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |                         freopen(name".inp","r",stdin);
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
drvca.cpp:60:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |                         freopen(name".out","w",stdout);
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
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