oj.uz

답안 #749439

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
749439 2023-05-28T03:36:34 Z ThMinh_ 3단 점프 (JOI19_jumps) C++14
100 / 100
 1841 ms 129576 KB 
#include<bits/stdc++.h>
#define forin(i,a,b) for(int i=a;i<=b;++i)
#define forde(i,a,b) for(int i=a;i>=b;--i)
#define ll long long
#define int long long
using namespace std;
const int N = 5e5 + 10;
int n, q;
ll d[N], tr[N << 2], lazy[N << 2], ans[N], sp[20][N];
struct query {
    int f, l, pos;
};
query r[N];
void build() {
    forin(i,1,n) sp[0][i] = d[i];
    forin(j,1,log2(n)) {
        forin(i,1,n - (1 << j - 1) + 1) {
            sp[j][i] = max(sp[j - 1][i], sp[j - 1][i + (1 << j - 1)]);
        }
    }
}
ll mx(int f, int l) {
    if(f == l) return d[f];
    int j = log2(l - f + 1);
    return max(sp[j][f], sp[j][l - (1 << j) + 1]);
}
void push(int id, int f, int l) {
    ll t = lazy[id];
    if(t) {
        tr[id] = max(tr[id], t + mx(f, l));
        if(f < l) {
            lazy[id << 1] = max(lazy[id << 1], t);
            lazy[id << 1 | 1] = max(lazy[id << 1 | 1], t);
        }
        lazy[id] = 0;
    }
}
void up(int u, int v, ll val, int id = 1, int f = 1, int l = n) {
    push(id, f, l);
    if(v < f || l < u) return;
    if(u <= f && l <= v) {
        lazy[id] = max(lazy[id], val);
        push(id, f, l);
        return;
    }
    int mid = f + l >> 1;
    up(u, v, val, id << 1, f, mid);
    up(u, v, val, id << 1 | 1, mid + 1, l);
    tr[id] = max(tr[id << 1], tr[id << 1 | 1]);
}
ll get(int u, int v, int id = 1, int f = 1, int l = n) {
    push(id, f, l);
    if(v < f || l < u) return 0;
    if(u <= f && l <= v) return tr[id];
    int mid = f + l >> 1;
    return max(get(u, v, id << 1, f, mid), get(u, v, id << 1 | 1, mid + 1, l));
}
int32_t main () {
    cin.tie(0)->sync_with_stdio(0);
    if(fopen("Task.inp","r")) {
        freopen("Task.inp","r",stdin);
        freopen("WA.out","w",stdout);
    }
    cin>>n;
    forin(i,1,n) cin>>d[i];
    build();
    cin>>q;
    forin(i,1,q) {
        r[i].pos = i;
        cin>>r[i].f>>r[i].l;
    }
    sort(r + 1, r + q + 1, [] (query a, query b) {
        return a.f > b.f;
    });
    stack<int> st;
    vector<pair<int, int>> vt;
    vt.push_back({0, 0});
    forde(i,n,1) {
        while(!st.empty() && d[st.top()] <= d[i]) {
            vt.push_back({i, st.top()});
            st.pop();
        }
        if(!st.empty()) vt.push_back({i, st.top()});
        st.push(i);
    }
    int j = 1;
    forin(i,1,q) {
        while(j <= vt.size() - 1 && vt[j].first >= r[i].f) {
            int a, b; tie(a, b) = vt[j++];
            if(2 * b - a > n) continue;
            up(2 * b - a, n, d[a] + d[b]);
        }
        ans[r[i].pos] = get(r[i].f, r[i].l);
    }
    forin(i,1,q) cout<<ans[i]<<"\n";
}

Compilation message

jumps.cpp: In function 'void build()':
jumps.cpp:17:31: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   17 |         forin(i,1,n - (1 << j - 1) + 1) {
      |                             ~~^~~
jumps.cpp:2:37: note: in definition of macro 'forin'
    2 | #define forin(i,a,b) for(int i=a;i<=b;++i)
      |                                     ^
jumps.cpp:18:64: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   18 |             sp[j][i] = max(sp[j - 1][i], sp[j - 1][i + (1 << j - 1)]);
      |                                                              ~~^~~
jumps.cpp: In function 'void up(long long int, long long int, long long int, long long int, long long int, long long int)':
jumps.cpp:46:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   46 |     int mid = f + l >> 1;
      |               ~~^~~
jumps.cpp: In function 'long long int get(long long int, long long int, long long int, long long int, long long int)':
jumps.cpp:55:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |     int mid = f + l >> 1;
      |               ~~^~~
jumps.cpp: In function 'int32_t main()':
jumps.cpp:88:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |         while(j <= vt.size() - 1 && vt[j].first >= r[i].f) {
      |               ~~^~~~~~~~~~~~~~~~
jumps.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen("Task.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen("WA.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

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

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 385 ms 22088 KB Output is correct
12 Correct 366 ms 22016 KB Output is correct
13 Correct 368 ms 22100 KB Output is correct
14 Correct 374 ms 22064 KB Output is correct
15 Correct 387 ms 22132 KB Output is correct
16 Correct 380 ms 21512 KB Output is correct
17 Correct 370 ms 21460 KB Output is correct
18 Correct 368 ms 21448 KB Output is correct
19 Correct 373 ms 21956 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 227 ms 43712 KB Output is correct
2 Correct 126 ms 42160 KB Output is correct
3 Correct 148 ms 40644 KB Output is correct
4 Correct 235 ms 43800 KB Output is correct
5 Correct 240 ms 43820 KB Output is correct
6 Correct 240 ms 43720 KB Output is correct
7 Correct 224 ms 43740 KB Output is correct
8 Correct 232 ms 43768 KB Output is correct
9 Correct 230 ms 43740 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 385 ms 22088 KB Output is correct
12 Correct 366 ms 22016 KB Output is correct
13 Correct 368 ms 22100 KB Output is correct
14 Correct 374 ms 22064 KB Output is correct
15 Correct 387 ms 22132 KB Output is correct
16 Correct 380 ms 21512 KB Output is correct
17 Correct 370 ms 21460 KB Output is correct
18 Correct 368 ms 21448 KB Output is correct
19 Correct 373 ms 21956 KB Output is correct
20 Correct 227 ms 43712 KB Output is correct
21 Correct 126 ms 42160 KB Output is correct
22 Correct 148 ms 40644 KB Output is correct
23 Correct 235 ms 43800 KB Output is correct
24 Correct 240 ms 43820 KB Output is correct
25 Correct 240 ms 43720 KB Output is correct
26 Correct 224 ms 43740 KB Output is correct
27 Correct 232 ms 43768 KB Output is correct
28 Correct 230 ms 43740 KB Output is correct
29 Correct 1776 ms 129448 KB Output is correct
30 Correct 1432 ms 125904 KB Output is correct
31 Correct 1451 ms 121760 KB Output is correct
32 Correct 1806 ms 129504 KB Output is correct
33 Correct 1735 ms 129480 KB Output is correct
34 Correct 1841 ms 128752 KB Output is correct
35 Correct 1751 ms 128808 KB Output is correct
36 Correct 1783 ms 128760 KB Output is correct
37 Correct 1695 ms 129316 KB Output is correct
38 Correct 1210 ms 129544 KB Output is correct
39 Correct 1147 ms 129432 KB Output is correct
40 Correct 1124 ms 127904 KB Output is correct
41 Correct 1122 ms 127512 KB Output is correct
42 Correct 1113 ms 127600 KB Output is correct
43 Correct 1154 ms 128448 KB Output is correct
44 Correct 1226 ms 129516 KB Output is correct
45 Correct 1218 ms 129556 KB Output is correct
46 Correct 1254 ms 128008 KB Output is correct
47 Correct 1226 ms 127828 KB Output is correct
48 Correct 1222 ms 127820 KB Output is correct
49 Correct 1240 ms 129164 KB Output is correct
50 Correct 1376 ms 129428 KB Output is correct
51 Correct 1415 ms 129576 KB Output is correct
52 Correct 1409 ms 128664 KB Output is correct
53 Correct 1346 ms 128568 KB Output is correct
54 Correct 1339 ms 128560 KB Output is correct
55 Correct 1404 ms 129312 KB Output is correct