Submission #1252426

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252426		chr34	3개의 봉우리 (IOI25_triples)	C++20	Compilation error	0 ms	0 KiB

triples

#include <bits/stdc++.h>

using namespace std;

//#define int long long
#define endl "\n"
#define dbg(x) cout << #x << " = " << (x) << endl;
const long long INF = 1e18;
const int MAXN = 1e6 + 10;
const int MOD = 1e9 + 7;

bool match(vector<int> a, vector<int> b){
	sort(a.begin(), a.end());
	sort(b.begin(), b.end());
	
	for(int i = 0; i < 3; ++i) if(a[i] != b[i]) return false;
	
	return true;
}

long long count_triples(vector<int> h) {
    int n = h.size();
    long long ans = 0;

   	for(int i = 0; i < n; ++i) {
        for(int j = i + 1; j < n; ++j) {
            int hi = h[i];
            int hj = h[j];
            int di = j - i;
            // solve for k, and check
            
            // 1) hi=di, hj=dj, hk=dk
            if (hi == di) {
                int dj = hj;                     // so dj = H[j]
                int k  = j + dj;                 // k = j + (k-j)
                if (k < N && k > j && H[k] == di + dj)
                    ans++;
            }

            // 2) hi=di, hj=dk, hk=dj
            if (hi == di) {
                // hj = dk = di + dj  =>  dj = hj - di
                int dj = hj - di;
                int k  = j + dj;
                if (dj > 0 && k < N && k > j && H[k] == dj)
                    ans++;
            }

            // 3) hi=dj, hj=di, hk=dk
            if (hj == di) {
                int dj = hi;
                int k  = j + dj;
                if (k < N && k > j && H[k] == di + dj)
                    ans++;
            }

            // 4) hi=dj, hj=dk, hk=di
            // hi = dj
            // hj = dk = di + dj
            if (hj == di + hi) {
                int dj = hi;
                int k  = j + dj;
                if (k < N && k > j && H[k] == di)
                    ans++;
            }

            // 5) hi=dk, hj=di, hk=dj
            // hi = dk = di + dj  =>  dj = hi - di
            if (hj == di) {
                int dj = hi - di;
                int k  = j + dj;
                if (dj > 0 && k < N && k > j && H[k] == dj)
                    ans++;
            }

            // 6) hi=dk, hj=dj, hk=di
            // hi = di + dj  =>  dj = hi - di
            // hj = dj  =>  hj == hi - di
            if (hj == hi - di) {
                int dj = hi - di;
                int k  = j + dj;
                if (dj > 0 && k < N && k > j && H[k] == di)
                    ans++;
            }
        }
    }

    return ans;
}

vector<int> construct_range(int m, int k){
	return {};
}

/*int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	//freopen("input.in", "r", stdin);
	//freopen("input.out", "w", stdout);    
	cout<<count_triples({4, 1, 4, 3, 2, 6, 1});
    return 0;
}*/

Compilation message (stderr)

triples.cpp: In function 'long long int count_triples(std::vector<int>)':
triples.cpp:36:25: error: 'N' was not declared in this scope
   36 |                 if (k < N && k > j && H[k] == di + dj)
      |                         ^
triples.cpp:36:39: error: 'H' was not declared in this scope
   36 |                 if (k < N && k > j && H[k] == di + dj)
      |                                       ^
triples.cpp:45:35: error: 'N' was not declared in this scope
   45 |                 if (dj > 0 && k < N && k > j && H[k] == dj)
      |                                   ^
triples.cpp:45:49: error: 'H' was not declared in this scope
   45 |                 if (dj > 0 && k < N && k > j && H[k] == dj)
      |                                                 ^
triples.cpp:53:25: error: 'N' was not declared in this scope
   53 |                 if (k < N && k > j && H[k] == di + dj)
      |                         ^
triples.cpp:53:39: error: 'H' was not declared in this scope
   53 |                 if (k < N && k > j && H[k] == di + dj)
      |                                       ^
triples.cpp:63:25: error: 'N' was not declared in this scope
   63 |                 if (k < N && k > j && H[k] == di)
      |                         ^
triples.cpp:63:39: error: 'H' was not declared in this scope
   63 |                 if (k < N && k > j && H[k] == di)
      |                                       ^
triples.cpp:72:35: error: 'N' was not declared in this scope
   72 |                 if (dj > 0 && k < N && k > j && H[k] == dj)
      |                                   ^
triples.cpp:72:49: error: 'H' was not declared in this scope
   72 |                 if (dj > 0 && k < N && k > j && H[k] == dj)
      |                                                 ^
triples.cpp:82:35: error: 'N' was not declared in this scope
   82 |                 if (dj > 0 && k < N && k > j && H[k] == di)
      |                                   ^
triples.cpp:82:49: error: 'H' was not declared in this scope
   82 |                 if (dj > 0 && k < N && k > j && H[k] == di)
      |                                                 ^