oj.uz

Submission #1102919

# Submission time Handle Problem Language Result Execution time Memory
1102919 2024-10-19T08:50:32 Z alexdumitru Feast (NOI19_feast) C++17
12 / 100
 183 ms 8640 KB 
#include <iostream>

using ll = int64_t;

const int NMAX = 3e5;

int n, k;
int a[NMAX + 1];
ll sp[NMAX + 1];
ll ans;


void read() {
    std::cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        std::cin >> a[i];
        sp[i] = sp[i - 1] + a[i];
    }
}

std::pair<ll, int> dp[NMAX + 1];

bool operator < (const std::pair<ll, int> & a, const std::pair<ll, int> & b) {
    if (a.first != b.first)
        return a.first < b.first;
    return a.second > b.second;
}

bool operator > (const std::pair<ll, int> & a, const std::pair<ll, int> & b) {
    if (a.first != b.first)
        return a.first > b.first;
    return a.second < b.second;
}

std::pair<ll, int> operator + (const std::pair<ll, int> & a, const std::pair<ll, int> & b) {
    return std::make_pair(a.first + b.first, a.second + b.second);
}

std::pair<ll, int> ok(ll pen) {
    int idx = 0;
    for (int i = 1; i <= n; i++) {
        //dp[i] = dp[j] + sp[i] - sp[j]
        dp[i] = std::max(dp[i - 1], dp[idx] + std::make_pair(sp[i] - sp[idx] - pen, 1));
        if (dp[i] + std::make_pair(-sp[i], 0) > dp[idx])
            idx = i;
    }
    return dp[n];
}

void solve() {
    ll st = 1;
    ll dr = 3e14;
    while (st <= dr) {
        ll mij = (st + dr) / 2;
        auto v = ok(mij);
        if (v.second <= k) {
            ans = v.first + mij * v.second;
            dr = mij - 1;
        } else {
            st = mij + 1;
        }
    }
}

void write_ans() {
    std::cout << ans << '\n';
}

int main() {
    read();
    solve();
    write_ans();
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 8160 KB Output is correct
2 Correct 177 ms 8520 KB Output is correct
3 Correct 148 ms 8640 KB Output is correct
4 Correct 148 ms 8476 KB Output is correct
5 Correct 157 ms 8520 KB Output is correct
6 Correct 144 ms 8264 KB Output is correct
7 Correct 160 ms 8324 KB Output is correct
8 Correct 147 ms 8520 KB Output is correct
9 Correct 150 ms 8264 KB Output is correct
10 Correct 151 ms 8444 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 8240 KB Output is correct
2 Correct 109 ms 8408 KB Output is correct
3 Correct 111 ms 8432 KB Output is correct
4 Correct 109 ms 8268 KB Output is correct
5 Correct 142 ms 8268 KB Output is correct
6 Correct 97 ms 8264 KB Output is correct
7 Correct 105 ms 8576 KB Output is correct
8 Correct 140 ms 8448 KB Output is correct
9 Correct 130 ms 8148 KB Output is correct
10 Correct 93 ms 8520 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 132 ms 8380 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 8160 KB Output is correct
2 Correct 177 ms 8520 KB Output is correct
3 Correct 148 ms 8640 KB Output is correct
4 Correct 148 ms 8476 KB Output is correct
5 Correct 157 ms 8520 KB Output is correct
6 Correct 144 ms 8264 KB Output is correct
7 Correct 160 ms 8324 KB Output is correct
8 Correct 147 ms 8520 KB Output is correct
9 Correct 150 ms 8264 KB Output is correct
10 Correct 151 ms 8444 KB Output is correct
11 Correct 99 ms 8240 KB Output is correct
12 Correct 109 ms 8408 KB Output is correct
13 Correct 111 ms 8432 KB Output is correct
14 Correct 109 ms 8268 KB Output is correct
15 Correct 142 ms 8268 KB Output is correct
16 Correct 97 ms 8264 KB Output is correct
17 Correct 105 ms 8576 KB Output is correct
18 Correct 140 ms 8448 KB Output is correct
19 Correct 130 ms 8148 KB Output is correct
20 Correct 93 ms 8520 KB Output is correct
21 Incorrect 132 ms 8380 KB Output isn't correct
22 Halted 0 ms 0 KB -