Submission #860049

#	Time	Username	Problem	Language	Result	Execution time	Memory
860049		Nhoksocqt1	Popeala (CEOI16_popeala)	C++17	0 / 100	11 ms	11356 KiB

popeala

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

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 20004;
const int MAXGROUP = 52;

int cnt[MAXN], sumP[MAXN], dp[MAXGROUP][MAXN], maxL[MAXGROUP][MAXN];
int point[MAXN], sum[MAXGROUP][MAXN], numTest, numPerson, maxGroup;
bool result[MAXGROUP][MAXN];

void DnC(int id, int l, int r, int optL, int optR) {
    if(l > r)
        return;

    int mid = (l + r) >> 1, opt(-1);
    for (int i = optL; i <= min(mid - 1, optR); ++i)
        cnt[i] = 0;

    int cntn(numPerson);
    for (int j = 1; j <= numPerson; ++j) {
        if(maxL[j][mid] > min(mid - 1, optR) + 1) {
            --cntn;
        } else {
            ++cnt[maxL[j][mid]];
        }
    }

    for (int i = min(mid - 1, optR); i >= optL; --i) {
        //cout << i << ' ' << mid << ' ' << cntn << '\n';
        if(minimize(dp[id][mid], dp[id - 1][i] + cntn * (sumP[mid] - sumP[i])))
            opt = i;

        cntn -= cnt[i + 1];
    }

    DnC(id, l, mid - 1, optL, opt);
    DnC(id, mid + 1, r, opt, optR);
}

void process(void) {
    cin >> numPerson >> numTest >> maxGroup;
    for (int i = 1; i <= numTest; ++i) {
        cin >> point[i];
        sumP[i] = sumP[i - 1] + point[i];
    }

    for (int j = 1; j <= numPerson; ++j) {
        for (int i = 1; i <= numTest; ++i) {
            char c;
            cin >> c;
            result[j][i] = (c == '1');
            sum[j][i] = sum[j][i - 1] + result[j][i];
        }
    }

    for (int j = 1; j <= maxGroup; ++j) {
        for (int i = 1; i <= numTest; ++i)
            dp[j][i] = 1e9+7;
    }

    for (int i = 1; i <= numTest; ++i) {
        int cnt(0);
        for (int j = 1; j <= numPerson; ++j)
            cnt += (sum[j][i] == i);

        dp[1][i] = cnt * sumP[i];
    }

    for (int i = 1; i <= numTest; ++i) {
        for (int j = 1; j <= numPerson; ++j)
            maxL[j][i] = (result[j][i] & result[j][i - 1]) ? maxL[j][i - 1] : i + (!result[j][i]);
    }

    /*for (int j = 1; j <= numPerson; ++j) {
        for (int i = 1; i <= numTest; ++i)
           cout << maxL[j][i] << " \n"[i == numTest];
    }*/

    for (int i = 2; i <= maxGroup; ++i)
        DnC(i, i, numTest, 1, numTest);

    for (int i = 1; i <= maxGroup; ++i)
        cout << dp[i][numTest] << '\n';
}

int main(void) {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);

    process();
    return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 9
• Subtask 4: 0 / 74