Submission #170118

#	Time	Username	Problem	Language	Result	Execution time	Memory
170118		gs18103	Naan (JOI19_naan)	C++14	29 / 100	38 ms	10456 KiB

naan

#include <bits/stdc++.h>
#define fi first
#define se second
#define eb emplace_back
#define em emplace
#define all(v) v.begin(), v.end()

using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

const int MAX = 2020;
const int INF = (1 << 30) - 1;
const ll LINF = 1LL << 60;

int n, k;
ll v[MAX][MAX], sum[MAX][MAX], p[MAX];
pll X[MAX];
bool chk[MAX];

bool cal(int j, int m, pii st) {
    return (sum[j][m] - sum[j][st.fi/st.se]) * n * st.se <= sum[j][k] * st.se + (st.fi % st.se) * v[j][st.fi/st.se+1] * n;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    cin >> n >> k;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= k; j++) {
            cin >> v[i][j];
            sum[i][j] = sum[i][j-1] + v[i][j];
        }
    }

    pll st = make_pair(0, 1);
    for(int i = 1; i <= n; i++) {
        int idx = 0;
        pll mi = make_pair(k, 1);
        for(int j = 1; j <= n; j++) {
            if(chk[j]) continue;
            int lb = 0, ub = k;
            while(lb < ub) {
                int m = (lb + ub + 1) / 2;
                if(cal(j, m, st)) lb = m;
                else ub = m - 1;
            }
            pll temp = make_pair((sum[j][st.fi/st.se] - sum[j][lb]) * n * st.se + (st.fi % st.se) * v[j][st.fi/st.se+1] * n + sum[j][k] * st.se, n * st.se * v[j][lb+1]);
            if(lb == k) {
                if(temp.fi == 0) {
                    temp = make_pair(0, 1);
                }
                else continue;
            }
            temp.fi += temp.se * lb;
            if(mi.fi * temp.se >= temp.fi * mi.se) mi = temp, idx = j;
        }
        if(idx == 0) return !(cout << -1);
        chk[idx] = true;
        p[i] = idx;
        ll g = __gcd(mi.fi, mi.se);
        mi.fi /= g, mi.se /= g;
        X[i] = mi;
        st = mi;
    }
    for(int i = 1; i < n; i++) {
        cout << X[i].fi << ' ' << X[i].se << endl;
    }
    for(int i = 1; i <= n; i++) {
        cout << p[i] << ' ';
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 24 / 24
• Subtask 3: 0 / 71