Submission #403832

#	Time	Username	Problem	Language	Result	Execution time	Memory
403832		Victor	Triangles (CEOI18_tri)	C++17	15 / 100	3 ms	348 KiB

tri

#include <bits/stdc++.h>

#include "trilib.h"

using namespace std;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define per(i, a, b) for (int i = b - 1; i >= (a); --i)
#define trav(a, x) for (auto &a : x)

#define all(x) x.begin(), x.end()
#define sz(x) x.size()
#define pb push_back

#define umap unordered_map
#define uset unordered_set

typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef long long ll;

const int INF = 1000000007;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin.exceptions(cin.failbit);

    int city;
    int n=get_n();
    if (50 < n) return 0;
    int arr[n][n][n], nxt[n];
    rep(i, 0, n) {
        rep(j, 0, n) {
            if (i == j) continue;
            bool skip = 0;

            rep(k, 0, n) {
                if (i == k || j == k) continue;
                skip |= is_clockwise(i + 1, k + 1, j + 1);
            }

            if (!skip) {
                city=i;
                nxt[i] = j;
                break;
            }
        }
    }

    int layer[n], cur = 0;
    memset(layer, -1, n * 4);

    while (1) {
        if (layer[city] != -1) {
            give_answer(cur - layer[city]);
            break;
        }
        layer[city] = cur++;
        city = nxt[city];
    }

    return 0;
}

Compilation message (stderr)

tri.cpp: In function 'int main()':
tri.cpp:34:9: warning: unused variable 'arr' [-Wunused-variable]
   34 |     int arr[n][n][n], nxt[n];
      |         ^~~
tri.cpp:57:23: warning: 'city' may be used uninitialized in this function [-Wmaybe-uninitialized]
   57 |         if (layer[city] != -1) {
      |             ~~~~~~~~~~^

• Subtask 1: 15 / 15
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 25