Submission #1254613

#TimeUsernameProblemLanguageResultExecution timeMemory
1254613ro9669Triple Peaks (IOI25_triples)C++20
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> #define sz(a) int(a.size()) #define all(a) a.begin(),a.end() using namespace std; int n; vector<int> a; bool ok(int i , int j , int k){ if (k >= sz(a)) return false; vector<int> X = {j - i , k - j , k - i}; vector<int> Y = {a[i] , a[j] , a[k]}; sort(all(X)); sort(all(Y)); bool check = true; for (int id = 0 ; id < 3 ; id++){ if (X[id] != Y[id]) return false; } return true; } namespace sub1{ bool check(){ return (sz(a) <= 100); } long long solve(){ int n = sz(a); long long ans = 0; for (int i = 0 ; i < n ; i++){ for (int j = i + 1 ; j < n ; j++){ for (int k = j + 1 ; k < n ; k++){ if (ok(i , j , k)) ans++; } } } return ans; } } namespace sub2{ bool check(){ for (int x : a){ if (x > 10) return false; } return true; } long long solve(){ int n = sz(a); long long ans = 0; for (int i = 0 ; i < n ; i++){ for (int j = i + 1 ; j <= min(i + 10 , n - 1) ; j++){ for (int k = j + 1 ; k <= min(j + 10 , n - 1) ; k++){ if (ok(i , j , k)) ans++; } } } return ans; } } namespace sub3{ bool check(){ return (sz(a) <= 2000); } long long solve(){ int n = sz(a); long long ans = 0; for (int i = 0 ; i < n ; i++){ for (int j = i + 1 ; j < n ; j++){ if ((j - i != a[i]) && (j - i != a[j])){ if (ok(i , j , j + min(a[i] , a[j]))) ans++; } else{ int x = (j - i == a[i]) ? a[j] : a[i]; if (ok(i , j , i + x)) ans++; if (ok(i , j , j + x)) ans++; } } } return ans; } } long long count_triples(vector<int> a){ if (sub1::check()) return sub1::solve(); if (sub2::check()) return sub2::solve(); if (sub3::check()) return sub3::solve(); return 0; } int main(){ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0); freopen("templete.inp" , "r" , stdin); freopen("templete.out" , "w" , stdout); cin >> n; a.resize(n); for (int &x : a) cin >> x; cout << count_triples(a) << "\n"; return 0; }

Compilation message (stderr)

triples.cpp: In function 'int main()':
triples.cpp:95:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   95 |     freopen("templete.inp" , "r" , stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
triples.cpp:96:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   96 |     freopen("templete.out" , "w" , stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccy6JEMy.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc4XMY0b.o:triples.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccy6JEMy.o: in function `main':
grader.cpp:(.text.startup+0x18a): undefined reference to `construct_range(int, int)'
collect2: error: ld returned 1 exit status