Submission #472188

#	Time	Username	Problem	Language	Result	Execution time	Memory
472188		abc864197532	Sateliti (COCI20_satellti)	C++17	10 / 110	19 ms	1228 KiB

Main

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#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pii pair <int, int>
#define X first
#define Y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define info() cout << __PRETTY_FUNCTION__ << ": " << __LINE__ << endl
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T a, U ...b) {
    cout << a << ' ', abc(b...);
}
template <typename T> void printv(T l, T r) {
    while (l != r) cout << *l << " \n"[++l == r];
}
template <typename A, typename B> istream& operator >> (istream& o, pair<A, B> &a) {
    return o >> a.X >> a.Y;
}
template <typename A, typename B> ostream& operator << (ostream& o, pair<A, B> a) {
    return o << '(' << a.X << ", " << a.Y << ')';
}
template <typename T> ostream& operator << (ostream& o, vector<T> a) {
    bool is = false;
    if (a.empty()) o << '{';
    for (T i : a) {o << (is ? ' ' : '{'), is = true, o << i;}
    return o << '}';
}
template <typename T> struct vv : vector <vector <T>> {
    vv(int n, int m, T v) : vector <vector <T>> (n, vector <T>(m, v)) {}
    vv() {}
};
template <typename T> struct vvv : vector <vv <T>> {
    vvv(int n, int m, int k, T v) : vector <vv <T>> (n, vv <T>(m, k, v)) {}
    vvv() {}
};
#ifdef Doludu
#define test(args...) info(), abc("[" + string(#args) + "]", args)
#define owo freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#else
#define test(args...) void(0)
#define owo ios::sync_with_stdio(false); cin.tie(0)
#endif
const int mod = 1e9 + 7, N = 200001, logN = 20, K = 48763;

int main () {
    owo;
    int n, m;
    cin >> n >> m;
    vector <int> id(n, 0), pw(2 * m + 1, 1);
    for (int i = 1; i <= 2 * m; ++i) pw[i] = 1ll * pw[i - 1] * K % mod;
    vector <string> s(n);
    vv <int> pre(n, 2 * m + 1, 0);
    auto query = [&](int i, int l, int r) {
        return (pre[i][r] - 1ll * pre[i][l] * pw[r - l] % mod + mod) % mod;
    };
    for (int i = 0; i < n; ++i) {
        cin >> s[i], s[i] += s[i];
        for (int j = 0; j < 2 * m; ++j) {
            pre[i][j + 1] = (1ll * pre[i][j] * K + s[i][j]) % mod;
        }
        for (int j = 1; j < m; ++j) {
            int l = 0, r = m;
            while (r - l > 1) {
                int mid = l + r >> 1;
                if (query(i, id[i], id[i] + mid) == query(i, j, j + mid)) l = mid;
                else r = mid;
            }
            if (s[i][id[i] + l] > s[i][j + l]) {
                id[i] = j;
            }
        }
    } 
    int ansr = 0, ansc = id[0];
    for (int i = 1; i < n; ++i) {
        int row = -1;
        for (int j = 0; j < n; ++j) {
            if (query((ansr + j) % n, ansc, ansc + m) != query((i + j) % n, id[i], id[i] + m)) {
                row = j;
                break;
            }
        }
        if (row == -1) continue;
        int l = 0, r = m;
        while (r - l > 1) {
            int mid = l + r >> 1;
            if (query((ansr + row) % n, ansc, ansc + mid) == query((i + row) % n, id[i], id[i] + mid)) l = mid;
            else r = mid;
        }
        if (s[(ansr + row) % n][ansc + l] > s[(i + row) % n][id[i] + l]) {
            ansr = i, ansc = id[i];
        }
    }
    for (int i = 0; i < n; ++i) for (int j = 0; j < m; ++j) {
        cout << s[(ansr + i) % n][ansc + j];
        if (j == m - 1) cout << '\n';
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:76:29: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   76 |                 int mid = l + r >> 1;
      |                           ~~^~~
Main.cpp:97:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   97 |             int mid = l + r >> 1;
      |                       ~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 60