Submission #856320

#	Time	Username	Problem	Language	Result	Execution time	Memory
856320		JooDdae	Naan (JOI19_naan)	C++17	29 / 100	104 ms	25556 KiB

naan

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

bool operator < (const array<ll, 2> a, const array<ll, 2> b) {
    return a[0]*b[1] < b[0]*a[1];
}

int n, m, c[2020][2020];

bool chk[2020];
array<ll, 2> p[2020][2020];

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n >> m;
    for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) cin >> c[i][j];

    for(int i=1;i<=n;i++) {
        ll sum = 0;
        for(int j=1;j<=m;j++) sum += c[i][j];

        ll s = 0;
        for(int j=1, k=0;j<n;j++) {
            while(k < m && (s + c[i][k+1]) * n <= sum * j) s += c[i][++k];
            ll C = c[i][k+1];
            p[i][j] = {sum*j-s*n + k*C*n, C*n};
            assert(j == 1 || p[i][j-1] < p[i][j]);
        }
    }

    vector<int> ans;
    for(int i=1;i<n;i++) {
        int mn = 1;
        while(chk[mn]) mn++;
        for(int j=1;j<=n;j++) if(!chk[j] && p[j][i] < p[mn][i]) mn = j;
        assert(1 <= p[mn][i][1] && p[mn][i][1] <= (int)1e9);
        cout << p[mn][i][0] << " " << p[mn][i][1] << "\n";
        chk[mn] = 1, ans.push_back(mn);
    }

    for(auto x : ans) cout << x << " ";
    for(int i=1;i<=n;i++) if(!chk[i]) cout << i;
}

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