oj.uz

Submission #1102907

# Submission time Handle Problem Language Result Execution time Memory
1102907 2024-10-19T08:38:26 Z alexdumitru Feast (NOI19_feast) C++17
12 / 100
 152 ms 10480 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 144 ms 10056 KB Output is correct
2 Correct 140 ms 10312 KB Output is correct
3 Correct 149 ms 10196 KB Output is correct
4 Correct 152 ms 10312 KB Output is correct
5 Correct 140 ms 10192 KB Output is correct
6 Correct 140 ms 10480 KB Output is correct
7 Correct 139 ms 8336 KB Output is correct
8 Correct 143 ms 10256 KB Output is correct
9 Correct 132 ms 8308 KB Output is correct
10 Correct 147 ms 10196 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 8264 KB Output is correct
2 Correct 91 ms 9572 KB Output is correct
3 Correct 89 ms 8264 KB Output is correct
4 Correct 94 ms 9596 KB Output is correct
5 Correct 132 ms 9820 KB Output is correct
6 Correct 95 ms 9032 KB Output is correct
7 Correct 94 ms 9396 KB Output is correct
8 Correct 134 ms 10312 KB Output is correct
9 Correct 128 ms 8264 KB Output is correct
10 Correct 93 ms 8376 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 129 ms 10312 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 144 ms 10056 KB Output is correct
2 Correct 140 ms 10312 KB Output is correct
3 Correct 149 ms 10196 KB Output is correct
4 Correct 152 ms 10312 KB Output is correct
5 Correct 140 ms 10192 KB Output is correct
6 Correct 140 ms 10480 KB Output is correct
7 Correct 139 ms 8336 KB Output is correct
8 Correct 143 ms 10256 KB Output is correct
9 Correct 132 ms 8308 KB Output is correct
10 Correct 147 ms 10196 KB Output is correct
11 Correct 90 ms 8264 KB Output is correct
12 Correct 91 ms 9572 KB Output is correct
13 Correct 89 ms 8264 KB Output is correct
14 Correct 94 ms 9596 KB Output is correct
15 Correct 132 ms 9820 KB Output is correct
16 Correct 95 ms 9032 KB Output is correct
17 Correct 94 ms 9396 KB Output is correct
18 Correct 134 ms 10312 KB Output is correct
19 Correct 128 ms 8264 KB Output is correct
20 Correct 93 ms 8376 KB Output is correct
21 Incorrect 129 ms 10312 KB Output isn't correct
22 Halted 0 ms 0 KB -