Submission #961301

#	Time	Username	Problem	Language	Result	Execution time	Memory
961301		mgch	Genetics (BOI18_genetics)	C++14	27 / 100	2037 ms	8808 KiB

genetics

    #include <bits/stdc++.h>
     
    using namespace std;
     
    const int N = 4107, L = 26, K = 66, MOD = 1000000007;
     
    char s[N][N];
     
    int main() {
    //  freopen("input.txt", "r", stdin);
    //    ios::sync_with_stdio(false); cin.tie(0);
        int n, m, k;
        scanf("%d%d%d\n", &n, &m, &k);
        vector <int> ord(n), rnk(n, 0);
        iota(ord.begin(), ord.end(), 0);
        for (int i = 0; i < n; ++i) {
            scanf("%s\n", s[i]);
        }
        auto diff = [&](int x, int y) {
            int ans = 0;
            for (int i = 0; i < m; ++i) {
                ans += s[x][i] != s[y][i];
            }
            return ans;
        };
        for (int it = 0; it < 3; ++it) {
            for (int i = 0; i + 1 < (int)ord.size(); ++i) {
                if (diff(ord[i], ord[i + 1]) != k) {
                    ++i;
                    continue;
                }
                rnk[ord[i]] += 1;
                rnk[ord[i + 1]] += 1;
            }
            sort(ord.begin(), ord.end(), [&](int x, int y) { return rnk[x] > rnk[y]; });
            while (ord.size() > 1 && rnk[ord.back()] == 0) ord.pop_back();
            reverse(ord.begin(), ord.end());
            //random_shuffle(ord.begin(), ord.end());
        }
        sort(ord.begin(), ord.end(), [&](int x, int y) { return rnk[x] > rnk[y]; });
        for (int j = 0; j < (int)ord.size(); ++j) {
            int x = ord[j];
            bool ok = true;
            for (int i = 0; i < n && ok; ++i) {
                if (i == x) continue;
                if (diff(x, i) != k) ok = false;
            }
            if (ok) { cout << x + 1 << '\n'; break; }
        }
    	return 0;
    }

Compilation message (stderr)

genetics.cpp: In function 'int main()':
genetics.cpp:13:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf("%d%d%d\n", &n, &m, &k);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
genetics.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |             scanf("%s\n", s[i]);
      |             ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 27 / 27
• Subtask 2: 0 / 19
• Subtask 3: 0 / 28
• Subtask 4: 0 / 26