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답안 #584898

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
584898 2022-06-28T06:29:20 Z 박상훈(#8379) 도장 모으기 (JOI14_stamps) C++14
10 / 100
 1000 ms 144240 KB 
#include <bits/stdc++.h>

typedef long long ll;
using namespace std;
const ll INF = 4e18;
struct Seg{
    ll tree[6060];
    int sz;
    void init(int n){
        sz = n;
        fill(tree, tree+sz*2, INF);
    }
    void update(int p, ll x){
        p += sz;
        for (tree[p]=min(tree[p], x);p>1;p>>=1) tree[p>>1] = min(tree[p], tree[p^1]);
    }
    ll query(int l, int r){
        r++;
        ll ret = INF;
        for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
            if (l&1) ret = min(ret, tree[l++]);
            if (r&1) ret = min(ret, tree[--r]);
        }
        return ret;
    }
}M1, M3[3030];
struct Seg2{
    ll tree[6060];
    int sz;
    void init(int n){
        sz = n;
        fill(tree, tree+sz*2, INF);
    }
    ll query(int p){
        p += sz;
        ll ret = tree[p];
        for (p>>=1;p;p>>=1) ret = min(ret, tree[p]);
        return ret;
    }
    void update(int l, int r, ll x){
        r++;
        for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
            if (l&1){
                tree[l] = min(tree[l], x);
                l++;
            }
            if (r&1){
                --r;
                tree[r] = min(tree[r], x);
            }
        }
    }
}M2;
ll dp[3030][3030], cstS[3030], dcstS[3030], UD[3030], DU[3030], T;

ll cst(int l, int r){
    if (r<l) return 0;
    return cstS[r] - cstS[l-1];
}

ll dcst(int l, int r){
    if (r<l) return 0;
    return cstS[r] - cstS[l-1] - (dcstS[r] - dcstS[l-1]);
}

ll Tij(int r, int l){
    return T*(r-l)*2 + UD[r] + DU[l];
}

int main(){
    int n;
    scanf("%d %lld", &n, &T);
    for (int i=1;i<=n;i++){
        int u, v, d, e;
        scanf("%d %d %d %d", &u, &v, &d, &e);
        UD[i] = u + e;
        DU[i] = d + v;
        int uu = u+v, dd = d+e;
        cstS[i] = cstS[i-1] + uu;
        dcstS[i] = dcstS[i-1] + max(uu-dd, 0);

        M3[i].init(n+1);
    }

    M1.init(n+1);
    M2.init(n+1);

    ll ans = T*(n+1) + cst(1, n);

    for (int i=1;i<=n;i++){
        for (int j=1;j<i;j++){
            dp[i][j] = T*i + cst(1, j-1) + dcst(j+1, i-1) + Tij(i, j);

            ///case 1. k<=j
            dp[i][j] = min(dp[i][j], M1.query(1, j) + T*i - cst(j, n) + dcst(j+1, i-1) + Tij(i, j));

            ///case 2. k>j, l<j
            dp[i][j] = min(dp[i][j], M2.query(j) + T*i - dcst(i, n) + Tij(i, j) - dcst(j, j));

            ///case 3. k>j, l=j
            dp[i][j] = min(dp[i][j], M3[j].query(j+1, i-1) + T*i - dcst(i, n) + Tij(i, j));

            ///update
            M1.update(i, dp[i][j] - T*i + cst(i+1, n));
            M2.update(j+1, i-1, dp[i][j] - T*i + dcst(i+1, n));
            M3[j].update(i, dp[i][j] - T*i + dcst(i+1, n));

            ans = min(ans, dp[i][j] + T*(n+1-i) + cst(i+1, n));


            ll m1 = INF, m2 = INF, m3 = INF;

            for (int k=1;k<=j;k++){
                for (int l=1;l<k;l++){
                    ///case 1. k<=j
                    m1 = min(m1, dp[k][l] - T*k + cst(k+1, n));
                    //dp[i][j] = min(dp[i][j], dp[k][l] + T*(i-k) + cst(k+1, j-1) + dcst(j+1, i-1) + Tij(i, j));
                }
            }

            for (int k=j+1;k<=i;k++){
                for (int l=1;l<j;l++){
                    ///case 2. k>j, l<j
                    m2 = min(m2, dp[k][l] - T*k + dcst(k+1, n));
                    //dp[i][j] = min(dp[i][j], dp[k][l] + T*(i-k) + dcst(k+1, i-1) + Tij(i, j) - dcst(j, j));
                }

                if (k==i) break;
                ///case 3.k>j, l=j
                int l = j;
                m3 = min(m3, dp[k][l] - T*k + dcst(k+1, n));
                //dp[i][j] = min(dp[i][j], dp[k][l] + T*(i-k) + dcst(k+1, i-1) + Tij(i, j));
            }

            assert(m1==M1.query(1, j));
            assert(m2==M2.query(j));
            assert(m3==M3[j].query(j+1, i-1));


        }
    }

    //printf("%lld\n", dp[2][1]);
    printf("%lld\n", ans);
    return 0;
}

Compilation message

stamps.cpp: In function 'int main()':
stamps.cpp:72:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |     scanf("%d %lld", &n, &T);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
stamps.cpp:75:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   75 |         scanf("%d %d %d %d", &u, &v, &d, &e);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 436 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 0 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct

Subtask #2
0 / 75.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 1164 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 13 ms 1256 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 2 ms 852 KB Output is correct
7 Correct 10 ms 1208 KB Output is correct
8 Correct 12 ms 1236 KB Output is correct
9 Correct 13 ms 1320 KB Output is correct
10 Correct 13 ms 1236 KB Output is correct
11 Correct 14 ms 1332 KB Output is correct
12 Correct 13 ms 1364 KB Output is correct
13 Correct 13 ms 1260 KB Output is correct
14 Correct 13 ms 1252 KB Output is correct
15 Correct 13 ms 1336 KB Output is correct
16 Incorrect 12 ms 1236 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1102 ms 144240 KB Time limit exceeded
2 Halted 0 ms 0 KB -