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답안 #369154

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
369154 2021-02-20T15:29:23 Z wiwiho Collecting Stamps 3 (JOI20_ho_t3) C++14
0 / 100
 1 ms 384 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 iceil(a, b) (((a) + (b) - 1) / (b))
#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 << ')';
}

int n;
ll L;
vector<ll> x;

ll dis(int a, int b){
    if(a > b) swap(a, b);
    return min(x[b] - x[a], L - x[b] + x[a]);
}

int main(){
    StarBurstStream

    cin >> n >> L;
    x.resize(n + 1);
    for(int i = 1; i <= n; i++) cin >> x[i];
    vector<ll> t(n + 1);
    for(int i = 1; i <= n; i++) cin >> t[i];

    vector<vector<vector<ll>>> dpl(n + 1, vector<vector<ll>>(n + 1, vector<ll>(n + 1, MAX)));
    vector<vector<vector<ll>>> dpr(n + 1, vector<vector<ll>>(n + 1, vector<ll>(n + 1, MAX)));
    dpl[0][0][0] = 0;
    dpr[0][0][0] = 0;

    for(int len = 0; len <= n; len++){
        for(int l = 0; l <= n; l++){
            int r = (l + len) % (n + 1);
            if(l < r && l != 0) continue;

            int tl = (l + 1) % (n + 1);
            int tr = (r - 1 + n + 1) % (n + 1);

            for(int k = 1; k <= n; k++){
                if(dpl[tl][r][k - 1] + dis(tl, l) <= t[l]) dpl[l][r][k] = min(dpl[l][r][k], dpl[tl][r][k - 1] + dis(tl, l));
                if(dpr[tl][r][k - 1] + dis(r, l) <= t[l]) dpl[l][r][k] = min(dpl[l][r][k], dpr[tl][r][k - 1] + dis(r, l));
                dpl[l][r][k] = min({dpl[l][r][k], dpl[tl][r][k] + dis(tl, l), dpr[tl][r][k] + dis(r, l)});

                if(dpl[l][tr][k - 1] + dis(l, r) <= t[r]) dpr[l][r][k] = min(dpr[l][r][k], dpl[l][tr][k - 1] + dis(l, r));
                if(dpr[l][tr][k - 1] + dis(tr, r) <= t[r]) dpr[l][r][k] = min(dpr[l][r][k], dpr[l][tr][k - 1] + dis(tr, r));
                dpr[l][r][k] = min({dpr[l][r][k], dpl[l][tr][k] + dis(l, r), dpr[l][tr][k] + dis(tr, r)});
            }
        }
    }

    int ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 0; j <= n; j++){
            for(int k = 0; k <= n; k++){
                if(dpl[j][k][i] < MAX || dpr[j][k][i] < MAX) ans = i;
            }
        }
    }
    cout << ans << "\n";

    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 364 KB Output isn't correct
4 Halted 0 ms 0 KB -