oj.uz

Submission #212479

# Submission time Handle Problem Language Result Execution time Memory
212479 2020-03-23T06:15:46 Z BThero Constellation 3 (JOI20_constellation3) C++17
35 / 100
 1381 ms 524292 KB 
#define DBG 1
// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>
//#include<ext/pb_ds/tree_policy.hpp>
//#include<ext/pb_ds/assoc_container.hpp>

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) if (DBG) cerr << #x << " = " << x << endl;

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;
typedef pair<int, int> pii;

//template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

const int MAXN = (int)2e5 + 5;

struct Node {
    Node *c1, *c2;
    ll x;
    int sz;
    
    Node() {
        c1 = c2 = 0;
        x = sz = 0;
    }
} *root[MAXN];

pii t[MAXN << 2];
vector<pii> S[MAXN];
ll dp[MAXN];
vector<int> adj[MAXN];
pii seg[MAXN];
int n, m, sz;
int arr[MAXN];

void ptUpd(Node *&v, int tl, int tr, int p, ll x) {
    if (p < tl || p > tr) {
        return;
    } 
    
    if (!v) {
        v = new Node();
        v -> x = 0;
        v -> sz = 1;
    }
    
    v -> x += x;
    
    if (tl == tr) {
        return;
    }
    
    int mid = (tl + tr) >> 1;
    
    if (p <= mid) {
        ptUpd(v -> c1, tl, mid, p, x);
    }
    else {
        ptUpd(v -> c2, mid + 1, tr, p, x);
    }
    
    v -> sz = 0;
    
    if (v -> c1) {
        v -> sz += v -> c1 -> sz;
    }
    
    if (v -> c2) {
        v -> sz += v -> c2 -> sz;
    }
}

ll segSum(Node *&v, int tl, int tr, int l, int r) {
    if (l > r || tl > r || tr < l || !v) {
        return 0;
    }
    
    if (l <= tl && tr <= r) {
        return v -> x;
    }
    
    int mid = (tl + tr) >> 1;
    return segSum(v -> c1, tl, mid, l, r)
    + segSum(v -> c2, mid + 1, tr, l, r);
}

void mergeT(Node *&v, Node *&v2) {
    if (!v2) {
        return;
    }
    
    if (!v) {
        v = v2;
        return;
    }
    
    v -> x += v2 -> x;
    mergeT(v -> c1, v2 -> c1);
    mergeT(v -> c2, v2 -> c2);
    
    v -> sz = 0;
    
    if (v -> c1) {
        v -> sz += v -> c1 -> sz;
    }
    
    if (v -> c2) {
        v -> sz += v -> c2 -> sz;
    }
}

void build(int v, int tl, int tr) {
    if (tl == tr) {
        t[v] = mp(arr[tl], tl);
        return;
    }
    
    int mid = (tl + tr) >> 1;
    int c1 = (v << 1), c2 = (c1 | 1);
    
    build(c1, tl, mid);
    build(c2, mid + 1, tr);
    
    t[v] = max(t[c1], t[c2]);
}

pii segMax(int v, int tl, int tr, int l, int r) {
    if (l > r || tl > r || tr < l) {
        return mp(-1, 0);
    }
    
    if (l <= tl && tr <= r) {
        return t[v];
    }
    
    int mid = (tl + tr) >> 1;
    int c1 = (v << 1), c2 = (c1 | 1);
    
    return max(segMax(c1, tl, mid, l, r), segMax(c2, mid + 1, tr, l, r));
}

void del(int v, int tl, int tr, int p) {
    if (tl == tr) {
        t[v] = mp(-1, tl);
        return;
    }
    
    int mid = (tl + tr) >> 1;
    int c1 = (v << 1), c2 = (c1 | 1);
    
    if (p <= mid) {
        del(c1, tl, mid, p);
    }
    else {
        del(c2, mid + 1, tr, p);
    }
    
    t[v] = max(t[c1], t[c2]);
}

ll go(int v, int x) {
    if (seg[v].fi > x || seg[v].se < x) {
        return dp[v];
    }
    
    ll ret = 0;
    
    for (int to : adj[v]) {
        ret += go(to, x);
    }
    
    return ret;
}

int calc(int l, int r, int h = n) {
    int v = ++sz;
    seg[v] = mp(l, r);
    pii tmp = segMax(1, 1, n, l, r);
    int mx = tmp.fi;
    vector<int> hi;
    hi.pb(tmp.se);
    hi.pb(l - 1);
    hi.pb(r + 1);
    del(1, 1, n, tmp.se);
    
    while (1) {
        tmp = segMax(1, 1, n, l, r);
        
        if (tmp.fi < mx) {
            break;
        }
        
        hi.pb(tmp.se);
        del(1, 1, n, tmp.se);
    }
    
    sort(all(hi));
    ll best = 0;
    vector<int> opt(r - l + 1, -1);
    
    for (int i = 0; i + 1 < hi.size(); ++i) {
        if (i > 0) {
            int x = hi[i];
            
            while (!S[x].empty()) {
                best = max(best, (ll)S[x].back().se);
                S[x].pop_back();
            }
        }
        
        int cl = hi[i] + 1;
        int cr = hi[i + 1] - 1;
        
        if (cl <= cr) {        
            for (int x = cl; x <= cr; ++x) {
                while (!S[x].empty() && S[x].back().fi > mx) {
                    opt[x - l] = max(opt[x - l], S[x].back().se);
                    S[x].pop_back();
                } 
            }
        
            int to = calc(cl, cr, mx);
            adj[v].pb(to);
            dp[v] += dp[to];
        
            for (int x = cl; x <= cr; ++x) {
                if (opt[x - l] != -1) {
                    best = max(best, -dp[to] + opt[x - l] + segSum(root[to], 1, n, 1, x));
                }
            }
            
            if (!root[v] || root[v] -> sz < root[to] -> sz) {
                swap(root[v], root[to]);
            }
            
            mergeT(root[v], root[to]);
        }
    }
    
    dp[v] += best;
    ptUpd(root[v], 1, n, 1, best);
    ptUpd(root[v], 1, n, l, -best);
    ptUpd(root[v], 1, n, r + 1, best);
    return v;
}

void solve() {
	scanf("%d", &n);
    
    for (int i = 1; i <= n; ++i) {
        scanf("%d", &arr[i]);
    }
    
    ll sum = 0;
    scanf("%d", &m);
    
    for (int i = 1; i <= m; ++i) {
        int x, y, c;
        scanf("%d %d %d", &x, &y, &c);
        S[x].pb(mp(y, c));
        sum += c;
    }
    
    for (int i = 1; i <= n; ++i) {
        sort(all(S[i]));
    }
    
    build(1, 1, n);
    printf("%lld\n", sum - dp[calc(1, n)]);
}

int main() {
	int tt = 1;
	
	while (tt--) {
		solve();
	}

	return 0;
}

Compilation message

constellation3.cpp: In function 'int calc(int, int, int)':
constellation3.cpp:209:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i + 1 < hi.size(); ++i) {
                     ~~~~~~^~~~~~~~~~~
constellation3.cpp: In function 'void solve()':
constellation3.cpp:256:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
constellation3.cpp:259:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~
constellation3.cpp:263:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
constellation3.cpp:267:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d %d", &x, &y, &c);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9984 KB Output is correct
11 Correct 10 ms 9984 KB Output is correct
12 Correct 10 ms 9984 KB Output is correct
13 Correct 11 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9984 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9984 KB Output is correct
19 Correct 12 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9984 KB Output is correct
11 Correct 10 ms 9984 KB Output is correct
12 Correct 10 ms 9984 KB Output is correct
13 Correct 11 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9984 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9984 KB Output is correct
19 Correct 12 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct
23 Correct 14 ms 10752 KB Output is correct
24 Correct 14 ms 10752 KB Output is correct
25 Correct 14 ms 10732 KB Output is correct
26 Correct 15 ms 10752 KB Output is correct
27 Correct 17 ms 10752 KB Output is correct
28 Correct 15 ms 10752 KB Output is correct
29 Correct 14 ms 10752 KB Output is correct
30 Correct 14 ms 10752 KB Output is correct
31 Correct 14 ms 10752 KB Output is correct
32 Correct 23 ms 15488 KB Output is correct
33 Correct 21 ms 14336 KB Output is correct
34 Correct 20 ms 13440 KB Output is correct
35 Correct 18 ms 12928 KB Output is correct
36 Correct 12 ms 9856 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 24 ms 18176 KB Output is correct
39 Correct 14 ms 10496 KB Output is correct
40 Correct 20 ms 14976 KB Output is correct
41 Correct 14 ms 10496 KB Output is correct
42 Correct 14 ms 10496 KB Output is correct
43 Correct 22 ms 15104 KB Output is correct
44 Correct 13 ms 10496 KB Output is correct

Subtask #3
0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9856 KB Output is correct
2 Correct 10 ms 9856 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9856 KB Output is correct
5 Correct 10 ms 9856 KB Output is correct
6 Correct 10 ms 9856 KB Output is correct
7 Correct 10 ms 9856 KB Output is correct
8 Correct 10 ms 9856 KB Output is correct
9 Correct 10 ms 9856 KB Output is correct
10 Correct 10 ms 9984 KB Output is correct
11 Correct 10 ms 9984 KB Output is correct
12 Correct 10 ms 9984 KB Output is correct
13 Correct 11 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9984 KB Output is correct
17 Correct 10 ms 9856 KB Output is correct
18 Correct 10 ms 9984 KB Output is correct
19 Correct 12 ms 9856 KB Output is correct
20 Correct 10 ms 9856 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9856 KB Output is correct
23 Correct 14 ms 10752 KB Output is correct
24 Correct 14 ms 10752 KB Output is correct
25 Correct 14 ms 10732 KB Output is correct
26 Correct 15 ms 10752 KB Output is correct
27 Correct 17 ms 10752 KB Output is correct
28 Correct 15 ms 10752 KB Output is correct
29 Correct 14 ms 10752 KB Output is correct
30 Correct 14 ms 10752 KB Output is correct
31 Correct 14 ms 10752 KB Output is correct
32 Correct 23 ms 15488 KB Output is correct
33 Correct 21 ms 14336 KB Output is correct
34 Correct 20 ms 13440 KB Output is correct
35 Correct 18 ms 12928 KB Output is correct
36 Correct 12 ms 9856 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 24 ms 18176 KB Output is correct
39 Correct 14 ms 10496 KB Output is correct
40 Correct 20 ms 14976 KB Output is correct
41 Correct 14 ms 10496 KB Output is correct
42 Correct 14 ms 10496 KB Output is correct
43 Correct 22 ms 15104 KB Output is correct
44 Correct 13 ms 10496 KB Output is correct
45 Correct 647 ms 152404 KB Output is correct
46 Correct 653 ms 150512 KB Output is correct
47 Correct 633 ms 148892 KB Output is correct
48 Correct 653 ms 152776 KB Output is correct
49 Correct 634 ms 148368 KB Output is correct
50 Correct 636 ms 147956 KB Output is correct
51 Correct 620 ms 148436 KB Output is correct
52 Correct 656 ms 152172 KB Output is correct
53 Correct 661 ms 151168 KB Output is correct
54 Runtime error 1381 ms 524292 KB Execution killed with signal 9 (could be triggered by violating memory limits)
55 Halted 0 ms 0 KB -