Submission #278763

#	Time	Username	Problem	Language	Result	Execution time	Memory
278763		caoash	Naan (JOI19_naan)	C++14	0 / 100	74 ms	126456 KiB

naan

#include <bits/stdc++.h> 
using namespace std;

using ll = long long;

using vi = vector<int>;
#define pb push_back
#define rsz resize
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()

using pi = pair<int,int>;
#define f first
#define s second
#define mp make_pair

struct fr{
    __int128 x, y;
    
    fr(__int128 X = 0, __int128 Y = 1){
        x = X, y = Y;
        ll g = __gcd(x, y);
        x /= g, y /= g;
    }
    
    friend fr operator+(fr a, fr b){
        return fr(a.x * b.y + b.x * a.y, a.y * b.y);
    }
    
    friend fr operator-(fr a, fr b){
        return fr(a.x * b.y - b.x * a.y, a.y * b.y);
    }
    
    friend fr operator*(fr a, fr b){
        return fr(a.x * b.x, a.y * b.y);
    }
    
    friend fr operator/(fr a, fr b){
        return fr(a.x * b.y, a.y * b.x);
    }
    
    friend bool operator<(fr a, fr b){
        return a.x * b.y < b.x * a.y;
    }
};

const int MX = 2005;

bool used[MX]; fr V[MX][MX]; fr need[MX], dist[MX], ans[MX]; int ind[MX];

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N, L; cin >> N >> L;
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < L; j++) {
            int x; cin >> x; 
            V[i][j] = fr(x);
            if (j != 0) V[i][j] = V[i][j] + V[i][j - 1];
        }
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if (used[j]) {
                continue;
            }
            fr need = V[i][L] * fr(i + 1, N);
            int it = lower_bound(V[j], V[j] + L, need) - V[j] - 1;
            fr to_add = fr(it) + fr(need - V[j][it]) / fr(V[j][it + 1] - V[j][it]);
            if (to_add < ans[i]) {
                ans[i] = to_add;
                ind[i] = j;
            }
        }
        if(i < N - 1) cout << (int) ans[i].x << " " << (int) ans[i].y << '\n';
        used[ind[i]] = true;
    }
    for (int i = 0; i < N - 1; i++) {
        cout << ind[i] + 1 << " ";
    }
    cout << '\n';
}

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