oj.uz

Submission #582368

# Submission time Handle Problem Language Result Execution time Memory
582368 2022-06-23T16:53:47 Z wiwiho Uplifting Excursion (BOI22_vault) C++14
20 / 100
 2804 ms 8376 KB 
#include <bits/stdc++.h>
#include <bits/extc++.h>

#define StarBurstStream ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define iter(a) a.begin(), a.end()
#define riter(a) a.rbegin(), a.rend()
#define lsort(a) sort(iter(a))
#define gsort(a) sort(riter(a))
#define pb(a) push_back(a)
#define eb(a) emplace_back(a)
#define pf(a) push_front(a)
#define ef(a) emplace_front(a)
#define pob pop_back()
#define pof pop_front()
#define mp(a, b) make_pair(a, b)
#define F first
#define S second
#define mt make_tuple
#define gt(t, i) get<i>(t)
#define tomax(a, b) ((a) = max((a), (b)))
#define tomin(a, b) ((a) = min((a), (b)))
#define topos(a) ((a) = (((a) % MOD + MOD) % MOD))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define printv(a, b) {bool pvaspace=false; \
for(auto pva : a){ \
    if(pvaspace) b << " "; pvaspace=true;\
    b << pva;\
}\
b << "\n";}

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<ld, ld>;
using tiii = tuple<int, int, int>;

const ll MOD = 1000000007;
const ll MAX = 1LL << 60;

template<typename A, typename B>
ostream& operator<<(ostream& o, pair<A, B> p){
    return o << '(' << p.F << ',' << p.S << ')';
}

ll ifloor(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a < 0) return (a - b + 1) / b;
    else return a / b;
}

ll iceil(ll a, ll b){
    if(b < 0) a *= -1, b *= -1;
    if(a > 0) return (a + b - 1) / b;
    else return a / b;
}

int M;
int S;
ll L;
vector<ll> dp;

void waassert(bool t){
    return;
    if(t) return;
    cout << "OAO\n";
    exit(0);
}

void upd_pos(int sz, ll cnt, int t){
    if(cnt == 0) return;
    //assert(sz > 0 && cnt > 0);
    vector<deque<pll>> dq(sz);
    for(int i = 0; i <= 2 * S; i++){
        int id = i % sz;
        while(!dq[id].empty() && dq[id].front().F / sz < i / sz - cnt) dq[id].pof;
        if(dp[i] != -MAX){
            ll tmp = dp[i] - i / sz * t;
            while(!dq[id].empty() && dq[id].back().S <= tmp) dq[id].pob;
            dq[id].eb(mp(i, tmp));
        }
        if(!dq[id].empty()){
            dp[i] = max(dp[i], dq[id].front().S + i / sz * t);
        }
    }
    /*cerr << "upd_pos " << sz << " " << cnt << "\n";
    printv(dp, cerr);*/
}

void upd_neg(int sz, ll cnt, int t){
    if(cnt == 0) return;
    //assert(sz > 0 && cnt > 0);
    vector<deque<pll>> dq(sz);
    for(int i = 2 * S; i >= 0; i--){
        int id = i % sz;
        while(!dq[id].empty() && dq[id].front().F / sz > i / sz + cnt) dq[id].pof;
        if(dp[i] != -MAX){
            ll tmp = dp[i] + i / sz * t;
            while(!dq[id].empty() && dq[id].back().S <= tmp) dq[id].pob;
            dq[id].eb(mp(i, tmp));
        }
        if(!dq[id].empty()){
            dp[i] = max(dp[i], dq[id].front().S - i / sz * t);
        }
    }
    /*cerr << "upd_neg " << sz << " " << cnt << "\n";
    printv(dp, cerr);*/
}

int main(){
    StarBurstStream

    cin >> M;
    cin >> L;
    
    ll sum = 0;
    ll total = 0;
    vector<ll> _a(2 * M + 1), _b(2 * M + 1);
    function<ll&(int)> a = [&](int x) -> ll&{
        waassert(M + x >= 0 && M + x <= 2 * M);
        return _a[M + x];
    };
    function<ll&(int)> b = [&](int x) -> ll&{
        waassert(M + x >= 0 && M + x <= 2 * M);
        return _b[M + x];
    };

    ll pos = 0, neg = 0;
    for(int i = -M; i <= M; i++){
        cin >> a(i);
        sum += a(i) * i;
        if(i < 0) neg += i * a(i);
        else pos += i * a(i);
    }

    if(sum <= L){
        for(int i = -M; i < 0; i++){
            swap(a(i), a(-i));
        }
        L = -L;
    }

    int p = -M - 1;
    sum = 0;
    for(int i = -M; i <= M; i++){
        sum += a(i) * i;
        if(sum <= L) p = i;
    }
    sum = 0;
    for(int i = -M; i <= p; i++){
        sum += a(i) * i;
        b(i) = a(i);
        total += b(i);
    }
    if(p == -M - 1){
        cout << "impossible\n";
        return 0;
    }
    if(p < M){
        b(p + 1) = (L - sum) / (p + 1);
        sum += b(p + 1) * (p + 1);
        total += b(p + 1);
    }
    //total = a(0);

    /*cerr << "test " << sum << " " << L << " " << L - sum << "\n";
    printv(_a, cerr);
    printv(_b, cerr);*/

    S = max({pos, -neg, (ll)M * M});
    dp.resize(2 * S + 1, -MAX);
    //assert(pos <= S && -neg <= S);
    dp[S] = 0;

    //printv(dp, cerr);
    for(int i = -M; i <= M; i++){
        if(i == 0) continue;
        if(i < 0){
            upd_pos(-i, b(i), -1);
            upd_neg(-i, a(i) - b(i), 1);
        }
        else{
            upd_pos(i, a(i) - b(i), 1);
            upd_neg(i, b(i), -1);
        }
    }

    ll ans = L - sum > S || L - sum < -S ? -MAX : dp[S + L - sum];
    ans += total;
    if(ans < 0) cout << "impossible\n";
    else cout << ans << "\n";

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 98 ms 892 KB Output is correct
7 Correct 19 ms 648 KB Output is correct
8 Correct 87 ms 900 KB Output is correct
9 Correct 171 ms 1436 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 98 ms 892 KB Output is correct
7 Correct 19 ms 648 KB Output is correct
8 Correct 87 ms 900 KB Output is correct
9 Correct 171 ms 1436 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 95 ms 896 KB Output is correct
18 Correct 20 ms 632 KB Output is correct
19 Correct 87 ms 900 KB Output is correct
20 Correct 167 ms 1292 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1422 ms 4620 KB Output is correct
25 Correct 236 ms 2280 KB Output is correct
26 Correct 2804 ms 8376 KB Output is correct
27 Correct 2731 ms 8244 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 3 ms 596 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 3 ms 596 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 3 ms 596 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 98 ms 892 KB Output is correct
7 Correct 19 ms 648 KB Output is correct
8 Correct 87 ms 900 KB Output is correct
9 Correct 171 ms 1436 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Runtime error 3 ms 596 KB Execution killed with signal 6
14 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 3 ms 596 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 98 ms 892 KB Output is correct
7 Correct 19 ms 648 KB Output is correct
8 Correct 87 ms 900 KB Output is correct
9 Correct 171 ms 1436 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 95 ms 896 KB Output is correct
18 Correct 20 ms 632 KB Output is correct
19 Correct 87 ms 900 KB Output is correct
20 Correct 167 ms 1292 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1422 ms 4620 KB Output is correct
25 Correct 236 ms 2280 KB Output is correct
26 Correct 2804 ms 8376 KB Output is correct
27 Correct 2731 ms 8244 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Runtime error 3 ms 596 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 3 ms 596 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 98 ms 892 KB Output is correct
7 Correct 19 ms 648 KB Output is correct
8 Correct 87 ms 900 KB Output is correct
9 Correct 171 ms 1436 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 95 ms 896 KB Output is correct
18 Correct 20 ms 632 KB Output is correct
19 Correct 87 ms 900 KB Output is correct
20 Correct 167 ms 1292 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1422 ms 4620 KB Output is correct
25 Correct 236 ms 2280 KB Output is correct
26 Correct 2804 ms 8376 KB Output is correct
27 Correct 2731 ms 8244 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 2 ms 596 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Runtime error 3 ms 596 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -