Submission #337422

#	Time	Username	Problem	Language	Result	Execution time	Memory
337422		ryangohca	Naan (JOI19_naan)	C++17	100 / 100	435 ms	95468 KiB

naan

#include <bits/stdc++.h>
#define int long long
#define pii pair<int, int>
using namespace std;
 
int nums[2000][2000];
pii cuts[2000][2000];
vector<pii> confirmed;
vector<int> order;
bool ordered[2000];
inline int read() {
    int g; cin >> g;
    return g;
}
main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n = read(), l = read();
    for (int i = 0; i < n; i++){
        int need = 0;
        for (int j = 0; j < l; j++){
            cin >> nums[i][j]; nums[i][j] *= n;
            need += nums[i][j];
        }
        need /= n;
        cuts[i][0] = {0, 0};
        int idxwhole = 0, idxpart = 0;
        int curr = 0;
        for (int j = 1; j < n; j++){
            while (need > curr){
                int willtake = nums[i][idxwhole] - idxpart;
                if (curr + willtake <= need){
                    curr += willtake;
                    idxwhole++;
                    idxpart = 0;
                } else {
                    idxpart += need - curr;
                    curr = need;
                }
            }
            cuts[i][j] = pii(idxwhole*nums[i][idxwhole]+idxpart, nums[i][idxwhole]);
            curr = 0;
        }
    }
    for (int i = 1; i < n; i++){
        auto take = pair<pii, int>({1e9, 1}, -1);
        for (int j = 0; j < n; j++){
            if (ordered[j]) continue;
            pii curr = cuts[j][i];
            if ((__int128_t)take.first.first * curr.second - (__int128_t) take.first.second * curr.first <= 0) continue;
            take = {curr, j};
        }
        ordered[take.second] = true;
        confirmed.push_back({take.first.first, take.first.second});
        order.push_back(take.second);
    }
    for (int i = 0; i < n; i++){
        if (!ordered[i]) order.push_back(i);
    }
    for (auto [a, b] : confirmed){
        int f = __gcd(a, b);
        cout << a/f << ' ' << b/f << '\n';
    }
    for (auto i : order) cout << i + 1 << ' ';
    cout << endl;
}

Compilation message (stderr)

naan.cpp:15:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   15 | main(){
      |      ^

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