Submission #730127

#	Time	Username	Problem	Language	Result	Execution time	Memory
730127		welleyth	Restore Array (RMI19_restore)	C++17	0 / 100	688 ms	134124 KiB

restore

#include <bits/stdc++.h>

using namespace std;

constexpr int M = 10000;
constexpr int N = 5000;

int n,m;
int l[M],r[M],k[M],value[M];
int a[N];
int sumL[N][N];
int sumR[N][N];
int pref[N];

bool ok(bool t = false){
    for(int i = 0; i < n; i++){
        pref[i] = a[i];
        if(i) pref[i] += pref[i-1];
    }

    for(int i = 0; i < m; i++){
        int S = pref[r[i]];
        if(l[i]) S -= pref[l[i]-1];
        if(S > sumR[l[i]][r[i]])
            return false;
        if(t && S < sumL[l[i]][r[i]])
            return false;
    }
    return true;
}

void solve(){
    cin >> n >> m;

    for(int i = 0; i < m; i++){
        cin >> l[i] >> r[i] >> k[i] >> value[i];
    }

    for(int i = 0; i < n; i++){
        for(int j = i; j < n; j++){
            sumL[i][j] = 0;
            sumR[i][j] = j - i + 1;
        }
    }

    for(int i = 0; i < m; i++){
        if(value[i] == 0)
            sumR[l[i]][r[i]] = min(sumR[l[i]][r[i]],r[i]-l[i]+1-k[i]);
        else
            sumL[l[i]][r[i]] = max(sumL[l[i]][r[i]],r[i]-l[i]+1-k[i]+1);
    }

//    for(int i = 0; i < m; i++){
//        cout << sumL[l[i]][r[i]] << " " << sumR[l[i]][r[i]] << "\n";
//    }

    for(int i = 0; i < n; i++){
        a[i] = 1;
        if(ok()) continue;
        a[i] = 0;
    }

    assert(ok(true));

    for(int i = 0; i < n; i++) cout << a[i] << " ";
    cout << "\n";

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
        solve();
    }
    return 0;
}
/**

k-th [l..r] = value

value == 0 -> cnt0 >= k
value == 1 -> cnt0 < k

cnt0 = (r - l + 1) - sum[l..r] = (r - l + 1) - cnt1

value == 0
cnt0 >= k
(r - l + 1) - cnt1 >= k
(r - l + 1) - k >= cnt1
cnt1 <= (r - l + 1) - k

value == 1
cnt0 < k
(r - l + 1) - cnt1 < k
(r - l + 1) - k < cnt1
cnt1 > (r - l + 1) - k

**/

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 25
• Subtask 4: 0 / 55