oj.uz

답안 #212531

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
212531 2020-03-23T11:50:46 Z BThero 별자리 3 (JOI20_constellation3) C++17
35 / 100
 1500 ms 31868 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;

ll t2[MAXN << 2];
pii t[MAXN << 2];
vector<pii> S[MAXN];
ll dp[MAXN], ext[MAXN];
vector<int> adj[MAXN];
pii seg[MAXN];
int n, m, sz;
int arr[MAXN];

void segUpd(int v, int tl, int tr, int l, int r, ll x) {
    if (l > r || tl > r || tr < l) {
        return;
    } 
    
    if (l <= tl && tr <= r) {
        t2[v] += x;
        return;
    }
    
    int mid = (tl + tr) >> 1;
    int c1 = (v << 1), c2 = (c1 | 1);
    segUpd(c1, tl, mid, l, r, x);
    segUpd(c2, mid + 1, tr, l, r, x);
}

ll getVal(int v, int tl, int tr, int p) {
    if (tl == tr) {
        return t2[v];
    }
    
    int mid = (tl + tr) >> 1;
    int c1 = (v << 1), c2 = (c1 | 1);
    
    if (p <= mid) {
        return t2[v] + getVal(c1, tl, mid, p);
    }
    else {
        return t2[v] + getVal(c2, mid + 1, tr, p);
    }
}

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;
    int last = l - 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) {                
            ll cbest = 0;
            vector<pii> V;
        
            for (int x = cl; x <= cr; ++x) {
                while (!S[x].empty() && S[x].back().fi > mx) {
                    V.pb(mp(x, S[x].back().se));
                    S[x].pop_back();
                } 
            }
        
            int to = calc(cl, cr, mx);
            
            for (auto it : V) {
                best = max(best, -dp[to] + it.se + getVal(1, 1, n, it.fi));
            }
            
            adj[v].pb(to);
            dp[v] += dp[to];
        }
    }
    
    for (int to : adj[v]) {
        int cl, cr;
        tie(cl, cr) = seg[to];
        segUpd(1, 1, n, l, cl - 1, ext[to]);
        segUpd(1, 1, n, cr + 1, r, ext[to]);
        ext[v] += ext[to];
    }   
    
    dp[v] += best;
    ext[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:155:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i + 1 < hi.size(); ++i) {
                     ~~~~~~^~~~~~~~~~~
constellation3.cpp:169:16: warning: unused variable 'cbest' [-Wunused-variable]
             ll cbest = 0;
                ^~~~~
constellation3.cpp:153:9: warning: unused variable 'last' [-Wunused-variable]
     int last = l - 1;
         ^~~~
constellation3.cpp: In function 'void solve()':
constellation3.cpp:204:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
constellation3.cpp:207:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~
constellation3.cpp:211:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
constellation3.cpp:215:14: 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 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 11 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 11 ms 9728 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 12 ms 9856 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 9728 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 11 ms 9856 KB Output is correct
20 Correct 13 ms 9728 KB Output is correct
21 Correct 11 ms 9856 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 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 11 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 11 ms 9728 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 12 ms 9856 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 9728 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 11 ms 9856 KB Output is correct
20 Correct 13 ms 9728 KB Output is correct
21 Correct 11 ms 9856 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 13 ms 9984 KB Output is correct
24 Correct 14 ms 9984 KB Output is correct
25 Correct 13 ms 9984 KB Output is correct
26 Correct 13 ms 9984 KB Output is correct
27 Correct 15 ms 9984 KB Output is correct
28 Correct 14 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 14 ms 9984 KB Output is correct
31 Correct 14 ms 9984 KB Output is correct
32 Correct 17 ms 10240 KB Output is correct
33 Correct 17 ms 10240 KB Output is correct
34 Correct 15 ms 10112 KB Output is correct
35 Correct 15 ms 10112 KB Output is correct
36 Correct 12 ms 9856 KB Output is correct
37 Correct 12 ms 9856 KB Output is correct
38 Correct 17 ms 10496 KB Output is correct
39 Correct 13 ms 9984 KB Output is correct
40 Correct 17 ms 10240 KB Output is correct
41 Correct 13 ms 9984 KB Output is correct
42 Correct 13 ms 9984 KB Output is correct
43 Correct 17 ms 10240 KB Output is correct
44 Correct 13 ms 9984 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 9728 KB Output is correct
4 Correct 11 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 11 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 11 ms 9728 KB Output is correct
10 Correct 10 ms 9856 KB Output is correct
11 Correct 10 ms 9856 KB Output is correct
12 Correct 12 ms 9856 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 9728 KB Output is correct
16 Correct 10 ms 9856 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9856 KB Output is correct
19 Correct 11 ms 9856 KB Output is correct
20 Correct 13 ms 9728 KB Output is correct
21 Correct 11 ms 9856 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 13 ms 9984 KB Output is correct
24 Correct 14 ms 9984 KB Output is correct
25 Correct 13 ms 9984 KB Output is correct
26 Correct 13 ms 9984 KB Output is correct
27 Correct 15 ms 9984 KB Output is correct
28 Correct 14 ms 9984 KB Output is correct
29 Correct 13 ms 9984 KB Output is correct
30 Correct 14 ms 9984 KB Output is correct
31 Correct 14 ms 9984 KB Output is correct
32 Correct 17 ms 10240 KB Output is correct
33 Correct 17 ms 10240 KB Output is correct
34 Correct 15 ms 10112 KB Output is correct
35 Correct 15 ms 10112 KB Output is correct
36 Correct 12 ms 9856 KB Output is correct
37 Correct 12 ms 9856 KB Output is correct
38 Correct 17 ms 10496 KB Output is correct
39 Correct 13 ms 9984 KB Output is correct
40 Correct 17 ms 10240 KB Output is correct
41 Correct 13 ms 9984 KB Output is correct
42 Correct 13 ms 9984 KB Output is correct
43 Correct 17 ms 10240 KB Output is correct
44 Correct 13 ms 9984 KB Output is correct
45 Correct 431 ms 31868 KB Output is correct
46 Correct 413 ms 31480 KB Output is correct
47 Correct 439 ms 31416 KB Output is correct
48 Correct 399 ms 31608 KB Output is correct
49 Correct 404 ms 31352 KB Output is correct
50 Correct 417 ms 31240 KB Output is correct
51 Correct 409 ms 31388 KB Output is correct
52 Correct 416 ms 31736 KB Output is correct
53 Correct 406 ms 31608 KB Output is correct
54 Execution timed out 1538 ms 19336 KB Time limit exceeded
55 Halted 0 ms 0 KB -