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답안 #212587

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
212587 2020-03-23T16:37:51 Z BThero 별자리 3 (JOI20_constellation3) C++17
100 / 100
 305 ms 28180 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;

vector<int> pos[MAXN];
vector<pii> stars[MAXN];
ll dp[MAXN], ext[MAXN];
ll fenw[MAXN];
int par[MAXN], L[MAXN], R[MAXN], sz[MAXN];
int arr[MAXN];
bool active[MAXN];
ll sum;
int n, m;

void fenwUpd(int p, ll x) {
    for (; p <= n; p |= (p + 1)) {
        fenw[p] += x;
    }
}

void update(int l, int r, ll x) {
    fenwUpd(l, x);
    fenwUpd(r + 1, -x);
}

ll getVal(int p) {
    ll ret = 0;
    
    for (; p > 0; --p) {
        ret += fenw[p];
        p &= (p + 1);
    }
    
    return ret;
}

int getPar(int x) {
    if (x == par[x]) {
        return x;
    }
    
    return par[x] = getPar(par[x]);
}

void uni(int a, int b) {
    a = getPar(a);
    b = getPar(b);
    
    if (a == b) {
        return;
    }
    
    if (sz[a] < sz[b]) {
        swap(a, b);
    }
    
    dp[a] += ext[a];
    ext[a] = 0;
    dp[b] += ext[b];
    ext[b] = 0;
    update(L[a], R[a], dp[b]);
    update(L[b], R[b], dp[a]);
    dp[a] += dp[b];
    sz[a] += sz[b];
    par[b] = a;
    L[a] = min(L[a], L[b]);
    R[a] = max(R[a], R[b]);
}

void solve() {
	scanf("%d", &n);
    
    for (int i = 1; i <= n; ++i) {
        scanf("%d", &arr[i]);
        pos[arr[i]].pb(i);
    }
    
    scanf("%d", &m);
    
    for (int i = 1; i <= m; ++i) {
        int x, y, c;
        scanf("%d %d %d", &x, &y, &c);
        stars[y].pb(mp(x, c));
        sum += c;
    }
    
    for (int i = 1; i <= n; ++i) {
        par[i] = L[i] = R[i] = i;
    }
    
    for (int y = 1; y <= n; ++y) {
        for (auto it : stars[y]) {
            int x, c;
            tie(x, c) = it;
            int p = getPar(x);
            ext[p] = max(ext[p], c + getVal(x) - dp[p]);
        }

        for (int x : pos[y]) {
            active[x] = 1;
        
            if (active[x - 1]) {
                uni(x - 1, x);
            }
            
            if (active[x + 1]) {
                uni(x, x + 1);
            }
        }
    }
    
    ll ans = 0;
    
    for (int i = 1; i <= n; ++i) {
        if (getPar(i) == i) {
            ans = max(ans, dp[i] + ext[i]);
        }
    }
    
    printf("%lld\n", sum - ans);
}

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

	return 0;
}

Compilation message

constellation3.cpp: In function 'void solve()':
constellation3.cpp:91:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
constellation3.cpp:94:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &arr[i]);
         ~~~~~^~~~~~~~~~~~~~~
constellation3.cpp:98:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
constellation3.cpp:102:14: 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 11 ms 9728 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 11 ms 9856 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 14 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 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 11 ms 9600 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9728 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9728 KB Output is correct
19 Correct 10 ms 9728 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 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 11 ms 9728 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 11 ms 9856 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 14 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 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 11 ms 9600 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9728 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9728 KB Output is correct
19 Correct 10 ms 9728 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 11 ms 9984 KB Output is correct
24 Correct 12 ms 9980 KB Output is correct
25 Correct 12 ms 9984 KB Output is correct
26 Correct 12 ms 9984 KB Output is correct
27 Correct 11 ms 9984 KB Output is correct
28 Correct 12 ms 9984 KB Output is correct
29 Correct 12 ms 9984 KB Output is correct
30 Correct 14 ms 10104 KB Output is correct
31 Correct 16 ms 9984 KB Output is correct
32 Correct 12 ms 9984 KB Output is correct
33 Correct 11 ms 9984 KB Output is correct
34 Correct 15 ms 9984 KB Output is correct
35 Correct 11 ms 9984 KB Output is correct
36 Correct 15 ms 9984 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 15 ms 9984 KB Output is correct
39 Correct 11 ms 9984 KB Output is correct
40 Correct 11 ms 9984 KB Output is correct
41 Correct 11 ms 9984 KB Output is correct
42 Correct 11 ms 9984 KB Output is correct
43 Correct 13 ms 9984 KB Output is correct
44 Correct 11 ms 9984 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 9728 KB Output is correct
2 Correct 11 ms 9728 KB Output is correct
3 Correct 10 ms 9856 KB Output is correct
4 Correct 10 ms 9728 KB Output is correct
5 Correct 10 ms 9728 KB Output is correct
6 Correct 10 ms 9728 KB Output is correct
7 Correct 11 ms 9856 KB Output is correct
8 Correct 10 ms 9728 KB Output is correct
9 Correct 14 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 10 ms 9856 KB Output is correct
13 Correct 10 ms 9856 KB Output is correct
14 Correct 11 ms 9600 KB Output is correct
15 Correct 10 ms 9856 KB Output is correct
16 Correct 10 ms 9728 KB Output is correct
17 Correct 10 ms 9728 KB Output is correct
18 Correct 10 ms 9728 KB Output is correct
19 Correct 10 ms 9728 KB Output is correct
20 Correct 10 ms 9728 KB Output is correct
21 Correct 10 ms 9856 KB Output is correct
22 Correct 10 ms 9728 KB Output is correct
23 Correct 11 ms 9984 KB Output is correct
24 Correct 12 ms 9980 KB Output is correct
25 Correct 12 ms 9984 KB Output is correct
26 Correct 12 ms 9984 KB Output is correct
27 Correct 11 ms 9984 KB Output is correct
28 Correct 12 ms 9984 KB Output is correct
29 Correct 12 ms 9984 KB Output is correct
30 Correct 14 ms 10104 KB Output is correct
31 Correct 16 ms 9984 KB Output is correct
32 Correct 12 ms 9984 KB Output is correct
33 Correct 11 ms 9984 KB Output is correct
34 Correct 15 ms 9984 KB Output is correct
35 Correct 11 ms 9984 KB Output is correct
36 Correct 15 ms 9984 KB Output is correct
37 Correct 12 ms 9984 KB Output is correct
38 Correct 15 ms 9984 KB Output is correct
39 Correct 11 ms 9984 KB Output is correct
40 Correct 11 ms 9984 KB Output is correct
41 Correct 11 ms 9984 KB Output is correct
42 Correct 11 ms 9984 KB Output is correct
43 Correct 13 ms 9984 KB Output is correct
44 Correct 11 ms 9984 KB Output is correct
45 Correct 305 ms 26336 KB Output is correct
46 Correct 260 ms 25976 KB Output is correct
47 Correct 262 ms 25852 KB Output is correct
48 Correct 259 ms 26452 KB Output is correct
49 Correct 248 ms 25720 KB Output is correct
50 Correct 267 ms 25720 KB Output is correct
51 Correct 273 ms 25976 KB Output is correct
52 Correct 255 ms 26104 KB Output is correct
53 Correct 262 ms 26232 KB Output is correct
54 Correct 228 ms 28156 KB Output is correct
55 Correct 243 ms 28180 KB Output is correct
56 Correct 200 ms 28096 KB Output is correct
57 Correct 208 ms 27896 KB Output is correct
58 Correct 196 ms 22904 KB Output is correct
59 Correct 190 ms 23032 KB Output is correct
60 Correct 155 ms 27260 KB Output is correct
61 Correct 150 ms 21752 KB Output is correct
62 Correct 217 ms 25792 KB Output is correct
63 Correct 147 ms 21736 KB Output is correct
64 Correct 146 ms 21624 KB Output is correct
65 Correct 211 ms 25848 KB Output is correct
66 Correct 150 ms 21360 KB Output is correct