Submission #1249612

#TimeUsernameProblemLanguageResultExecution timeMemory
1249612FernandoJC07Triple Peaks (IOI25_triples)C++20
Compilation error
0 ms0 KiB
#include <vector> #define ll long long #define vi vector<int> #define vl vector<ll> #define For(i, a, n) for(int i = a; i<n; ++i) using namespace std; ll count_triples(vi H){ int n = H.size(); int N = n; function<bool(int, int, int)> triple = [&](int a, int b, int c){ if(a>b || a>c || b>c) return false; if(c>=n) return false; if(a<0) return false; vi q1 = {b-a, c-b, c-a}; vi q2 = {H[a], H[b], H[c]}; sort(q1.begin(), q1.end()); sort(q2.begin(), q2.end()); return (q1 == q2); }; ll ans = 0; For(i, 0, n){ For(j, i+1, n){ if(H[i] == H[j]){ if(j-i != H[i]) continue; int k = j+H[i]; if(k>=N) continue; ans += (H[k] == 2*H[i]); continue; } if(j-i != H[i] && j-i != H[j]){ int k2 = i+j+H[i]+H[j]; if(k2&1) continue; k2/=2; if(k2>=N) continue; ans += (H[k2] == j-i && k2-j == min(H[i], H[j]) && k2-i == max(H[i], H[j])); continue; } if(j-i == H[i]){ ans += triple(i, j, i+H[j]); ans += triple(i, j, j+H[j]); } else if(j-i == H[j]){ ans += triple(i, j, i+H[i]); ans += triple(i, j, j+H[i]); } } } return ans; }

Compilation message (stderr)

triples.cpp: In function 'long long int count_triples(std::vector<int>)':
triples.cpp:11:5: error: 'function' was not declared in this scope
   11 |     function<bool(int, int, int)> triple = [&](int a, int b, int c){
      |     ^~~~~~~~
triples.cpp:2:1: note: 'std::function' is defined in header '<functional>'; did you forget to '#include <functional>'?
    1 | #include <vector>
  +++ |+#include <functional>
    2 | #define ll long long
triples.cpp:11:32: error: expression list treated as compound expression in functional cast [-fpermissive]
   11 |     function<bool(int, int, int)> triple = [&](int a, int b, int c){
      |                                ^
triples.cpp:11:14: error: expected primary-expression before 'bool'
   11 |     function<bool(int, int, int)> triple = [&](int a, int b, int c){
      |              ^~~~
triples.cpp:40:24: error: 'triple' was not declared in this scope
   40 |                 ans += triple(i, j, i+H[j]);
      |                        ^~~~~~
triples.cpp:44:24: error: 'triple' was not declared in this scope
   44 |                 ans += triple(i, j, i+H[i]);
      |                        ^~~~~~