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Submission #54863

# Submission time Handle Problem Language Result Execution time Memory
54863 2018-07-05T08:23:54 Z FLDutchman Rice Hub (IOI11_ricehub) C++14
100 / 100
 68 ms 3452 KB 
#include "bits/stdc++.h"
#include "ricehub.h"
using namespace std;

typedef long long ll;
typedef vector<ll> vi;

vi prefix, suffix;
vi rice;

ll MAX;

ll cost(ll l, ll r){
    ll m = (l+r)/2;
    ll c = prefix[r] - prefix[m] - rice[m] * (r-m);
    c += suffix[l] - suffix[m] - (MAX - rice[m]) * (m-l);
    return c;
}

bool possible(int l, int r, ll B){
    //cout <<l << " " << r << " " << cost(l,r) << endl;
    return cost(l, r) <= B;
}

int besthub(int R, int L, int X[], ll B)
{
    MAX = L;
    rice.resize(R);
    for(int i = 0; i < R; i++) rice[i] = X[i];
    prefix.assign(R+1, 0); suffix.assign(R+1, 0);
    for(int i = 1; i <= R; i++) prefix[i] = prefix[i-1] + rice[i-1];
    for(int i = R-1; i >= 0; i--) suffix[i] = suffix[i+1] + L - rice[i];
    ll l = 0, r = 0;
    ll best = -1;
    while(!(l == R and r == R)){
        while(possible(l, r, B)){
            best = max(best, r-l);
            if(r < R) r++;
            else break;
        }
        l++;
    }

    return best;
}
/*
int test[] = {1, 2, 10, 12, 14};
int main(){
    
    cout << besthub(5, 20, test, 6)<<endl;
}
*/

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 392 KB Output is correct
3 Correct 2 ms 572 KB Output is correct
4 Correct 2 ms 572 KB Output is correct
5 Correct 2 ms 572 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 572 KB Output is correct
2 Correct 2 ms 572 KB Output is correct
3 Correct 2 ms 572 KB Output is correct
4 Correct 2 ms 572 KB Output is correct
5 Correct 3 ms 572 KB Output is correct
6 Correct 2 ms 572 KB Output is correct
7 Correct 2 ms 608 KB Output is correct
8 Correct 3 ms 608 KB Output is correct
9 Correct 2 ms 608 KB Output is correct
10 Correct 2 ms 608 KB Output is correct
11 Correct 2 ms 612 KB Output is correct
12 Correct 2 ms 620 KB Output is correct
13 Correct 2 ms 620 KB Output is correct
14 Correct 3 ms 620 KB Output is correct
15 Correct 2 ms 620 KB Output is correct
16 Correct 3 ms 620 KB Output is correct
17 Correct 2 ms 620 KB Output is correct
18 Correct 2 ms 620 KB Output is correct
19 Correct 3 ms 620 KB Output is correct
20 Correct 2 ms 620 KB Output is correct
21 Correct 3 ms 620 KB Output is correct
22 Correct 2 ms 620 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 2 ms 620 KB Output is correct
25 Correct 2 ms 620 KB Output is correct
26 Correct 3 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 2 ms 620 KB Output is correct

Subtask #3
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 3 ms 620 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 2 ms 620 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 3 ms 620 KB Output is correct
9 Correct 2 ms 624 KB Output is correct
10 Correct 2 ms 624 KB Output is correct
11 Correct 3 ms 624 KB Output is correct
12 Correct 2 ms 624 KB Output is correct
13 Correct 2 ms 624 KB Output is correct
14 Correct 2 ms 624 KB Output is correct
15 Correct 2 ms 748 KB Output is correct
16 Correct 2 ms 748 KB Output is correct
17 Correct 3 ms 748 KB Output is correct
18 Correct 3 ms 748 KB Output is correct
19 Correct 2 ms 748 KB Output is correct
20 Correct 2 ms 748 KB Output is correct
21 Correct 3 ms 748 KB Output is correct
22 Correct 3 ms 764 KB Output is correct
23 Correct 3 ms 764 KB Output is correct
24 Correct 5 ms 764 KB Output is correct
25 Correct 3 ms 764 KB Output is correct
26 Correct 3 ms 764 KB Output is correct
27 Correct 2 ms 764 KB Output is correct
28 Correct 3 ms 764 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 1148 KB Output is correct
2 Correct 5 ms 1148 KB Output is correct
3 Correct 42 ms 3324 KB Output is correct
4 Correct 68 ms 3324 KB Output is correct
5 Correct 9 ms 3324 KB Output is correct
6 Correct 19 ms 3324 KB Output is correct
7 Correct 19 ms 3324 KB Output is correct
8 Correct 34 ms 3324 KB Output is correct
9 Correct 12 ms 3324 KB Output is correct
10 Correct 10 ms 3324 KB Output is correct
11 Correct 28 ms 3452 KB Output is correct
12 Correct 24 ms 3452 KB Output is correct
13 Correct 11 ms 3452 KB Output is correct
14 Correct 12 ms 3452 KB Output is correct
15 Correct 31 ms 3452 KB Output is correct
16 Correct 24 ms 3452 KB Output is correct
17 Correct 23 ms 3452 KB Output is correct
18 Correct 35 ms 3452 KB Output is correct
19 Correct 27 ms 3452 KB Output is correct
20 Correct 26 ms 3452 KB Output is correct