Submission #415907

#	Time	Username	Problem	Language	Result	Execution time	Memory
415907		snasibov05	Jousting tournament (IOI12_tournament)	C++14	0 / 100	1087 ms	5660 KiB

tournament

#include <vector>

using namespace std;

#define pb push_back

struct range{
    int l, r;
    int idx;
};

vector<int> val;
vector<vector<int>> ed;

int buildTree(int n, int c, int*& s, int*& e){
    int idx = n;
    vector<range> cur(n);

    for (int i = 0; i < n; ++i) {
        cur[i].l = cur[i].r = cur[i].idx = i;
    }

    for (int i = 0; i < c; ++i) {
        for (int j = s[i]; j <= e[i]; ++j) {
            ed[idx].pb(cur[j].idx);
        }

        cur[s[i]].r = cur[e[i]].r;
        cur[s[i]].idx = idx;

        int k = e[i] - s[i];
        for (int j = s[i] + 1; j <= e[i]; ++j) {
            cur[j] = cur[j + k];
        }
        idx++;
    }

    return idx-1;
}

void dfs(int v){
    for (auto x : ed[v]){
        dfs(x);
        val[v] = max(val[v], val[x]);
    }
}

int GetBestPosition(int n, int c, int r, int *k, int *s, int *e) {
    val.resize(2*n);
    ed.resize(2*n);

    int m = buildTree(n, c, s, e);

    int mx = 0, ans = 0;

    for (int i = 0; i < n; ++i) {
        val.assign(2*n+1, 0);
        for (int j = 0; j < i; ++j) {
            val[j] = k[j];
        }
        val[i] = r;
        for (int j = i; j < n-1; ++j) {
            val[j+1] = k[j];
        }

        dfs(m);

        int cnt = 0;

        for (int j = 0; j <= m; ++j) {
            if (val[j] == r) cnt++;
        }

        if (cnt > mx) {
            ans = i;
            mx = cnt;
        }
    }

    return ans;

}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 32
• Subtask 3: 0 / 51