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답안 #212478

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
212478 2020-03-23T06:12:15 Z BThero 별자리 3 (JOI20_constellation3) C++17
35 / 100
 1404 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;

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 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()) {
                assert(S[x].back().fi <= h);
                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) {
                    assert(S[x].back().fi <= h);
                    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] + go(to, x));
                }
            }
        }
    }
    
    dp[v] += 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:122:27: 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:162:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
constellation3.cpp:165:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~
constellation3.cpp:169:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
constellation3.cpp:173:14: 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

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 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 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 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 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9728 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 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 ms 9984 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 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 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 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 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9728 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 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 ms 9984 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 12 ms 9856 KB Output is correct
24 Correct 16 ms 9984 KB Output is correct
25 Correct 12 ms 9856 KB Output is correct
26 Correct 13 ms 9856 KB Output is correct
27 Correct 13 ms 9856 KB Output is correct
28 Correct 13 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 15 ms 9984 KB Output is correct
31 Correct 12 ms 9856 KB Output is correct
32 Correct 31 ms 15104 KB Output is correct
33 Correct 27 ms 13824 KB Output is correct
34 Correct 24 ms 13056 KB Output is correct
35 Correct 24 ms 12544 KB Output is correct
36 Correct 11 ms 9856 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 22 ms 18176 KB Output is correct
39 Correct 12 ms 9856 KB Output is correct
40 Correct 32 ms 14848 KB Output is correct
41 Correct 14 ms 9856 KB Output is correct
42 Correct 13 ms 9856 KB Output is correct
43 Correct 31 ms 14848 KB Output is correct
44 Correct 12 ms 9856 KB Output is correct

Subtask #3
0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 10 ms 9728 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 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 10 ms 9728 KB Output is correct
8 Correct 10 ms 9728 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 9856 KB Output is correct
12 Correct 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 10 ms 9856 KB Output is correct
15 Correct 10 ms 9728 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 9856 KB Output is correct
19 Correct 10 ms 9856 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 ms 9984 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 12 ms 9856 KB Output is correct
24 Correct 16 ms 9984 KB Output is correct
25 Correct 12 ms 9856 KB Output is correct
26 Correct 13 ms 9856 KB Output is correct
27 Correct 13 ms 9856 KB Output is correct
28 Correct 13 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 15 ms 9984 KB Output is correct
31 Correct 12 ms 9856 KB Output is correct
32 Correct 31 ms 15104 KB Output is correct
33 Correct 27 ms 13824 KB Output is correct
34 Correct 24 ms 13056 KB Output is correct
35 Correct 24 ms 12544 KB Output is correct
36 Correct 11 ms 9856 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 22 ms 18176 KB Output is correct
39 Correct 12 ms 9856 KB Output is correct
40 Correct 32 ms 14848 KB Output is correct
41 Correct 14 ms 9856 KB Output is correct
42 Correct 13 ms 9856 KB Output is correct
43 Correct 31 ms 14848 KB Output is correct
44 Correct 12 ms 9856 KB Output is correct
45 Correct 389 ms 27696 KB Output is correct
46 Correct 402 ms 27248 KB Output is correct
47 Correct 378 ms 28540 KB Output is correct
48 Correct 383 ms 27276 KB Output is correct
49 Correct 374 ms 28048 KB Output is correct
50 Correct 370 ms 27420 KB Output is correct
51 Correct 371 ms 27836 KB Output is correct
52 Correct 389 ms 28840 KB Output is correct
53 Correct 399 ms 27620 KB Output is correct
54 Runtime error 1404 ms 524292 KB Execution killed with signal 9 (could be triggered by violating memory limits)
55 Halted 0 ms 0 KB -