oj.uz

Submission #534406

# Submission time Handle Problem Language Result Execution time Memory
534406 2022-03-08T06:40:26 Z idas Feast (NOI19_feast) C++11
12 / 100
 99 ms 9680 KB 
#include <bits/stdc++.h>
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr)
#define f first
#define s second
#define pb push_back
#define sz(x) ((int)((x).size()))
#define le(vec) vec[vec.size()-1]
#define all(x) (x).begin(), (x).end()
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()

using namespace std;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;
typedef map<int, int> mii;
typedef vector<int> vi;
typedef long double ld;
typedef long long ll;

const int INF=1e9, MOD=1e9+7, mod=998244353;
const ll LINF=1e18;

void setIO()
{
    FAST_IO;
}

void setIO(string s)
{
    FAST_IO;
    freopen((s+".in").c_str(), "r", stdin);
    freopen((s+".out").c_str(), "w", stdout);
}

#define int long long

const int N=3e5+10;
int n, k;
ll a[N], p[N];
pair<ll, int> dp[N];

void calc(ll x)
{
    FOR(i, 0, n+1) dp[i]={0,0};
    pair<ll, int> best={0,0};
    FOR(i, 1, n+1)
    {
        dp[i]=max(dp[i-1], {best.f-x+p[i],best.s-1});
        best=max(best, {dp[i].f-p[i],dp[i].s});
    }
}

signed main()
{
    setIO();
    cin >> n >> k;
    FOR(i, 1, n+1) cin >> a[i];
    FOR(i, 1, n+1) p[i]=p[i-1]+a[i];

    int l=0, r=INF;
    while(l<r){
        int m=(l+r)/2;
        calc(m);
        if(-dp[n].s<=k) r=m;
        else l=m+1;
    }

    calc(l);
    ll ans=dp[n].f-dp[n].s*l;
    cout << ans;
}

Compilation message

feast.cpp: In function 'void setIO(std::string)':
feast.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s+".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s+".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 9396 KB Output is correct
2 Correct 57 ms 9572 KB Output is correct
3 Correct 58 ms 9680 KB Output is correct
4 Correct 58 ms 9616 KB Output is correct
5 Correct 64 ms 9540 KB Output is correct
6 Correct 61 ms 9416 KB Output is correct
7 Correct 58 ms 9408 KB Output is correct
8 Correct 60 ms 9592 KB Output is correct
9 Correct 57 ms 9416 KB Output is correct
10 Correct 60 ms 9444 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 9464 KB Output is correct
2 Correct 52 ms 9672 KB Output is correct
3 Correct 48 ms 9472 KB Output is correct
4 Correct 46 ms 9480 KB Output is correct
5 Correct 58 ms 9332 KB Output is correct
6 Correct 51 ms 9444 KB Output is correct
7 Correct 50 ms 9588 KB Output is correct
8 Correct 62 ms 9580 KB Output is correct
9 Correct 53 ms 9380 KB Output is correct
10 Correct 47 ms 9628 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 99 ms 9596 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 332 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 9396 KB Output is correct
2 Correct 57 ms 9572 KB Output is correct
3 Correct 58 ms 9680 KB Output is correct
4 Correct 58 ms 9616 KB Output is correct
5 Correct 64 ms 9540 KB Output is correct
6 Correct 61 ms 9416 KB Output is correct
7 Correct 58 ms 9408 KB Output is correct
8 Correct 60 ms 9592 KB Output is correct
9 Correct 57 ms 9416 KB Output is correct
10 Correct 60 ms 9444 KB Output is correct
11 Correct 62 ms 9464 KB Output is correct
12 Correct 52 ms 9672 KB Output is correct
13 Correct 48 ms 9472 KB Output is correct
14 Correct 46 ms 9480 KB Output is correct
15 Correct 58 ms 9332 KB Output is correct
16 Correct 51 ms 9444 KB Output is correct
17 Correct 50 ms 9588 KB Output is correct
18 Correct 62 ms 9580 KB Output is correct
19 Correct 53 ms 9380 KB Output is correct
20 Correct 47 ms 9628 KB Output is correct
21 Incorrect 99 ms 9596 KB Output isn't correct
22 Halted 0 ms 0 KB -