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Submission #105313

# Submission time Handle Problem Language Result Execution time Memory
105313 2019-04-11T08:19:43 Z win11905 Palembang Bridges (APIO15_bridge) C++11
100 / 100
 111 ms 6408 KB 
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define pii pair<int, int>
#define x first
#define y second
#define long long long
using namespace std;

const int N = 1e5+5;

int k, n, sz;
vector<pii> vec;
long ans;
long dp[2][N];

void solve_median(int z) {
    priority_queue<int> Q1;
    priority_queue<int, vector<int>, greater<int> > Q2;
    long sum1 = 0, sum2 = 0;
    for(int i = 0; i < sz; ++i) {
        Q1.emplace(vec[i].x), sum1 += vec[i].x;
        Q2.emplace(vec[i].y), sum2 += vec[i].y;
        if(Q1.top() > Q2.top()) {
            int u = Q1.top(), v = Q2.top();
            Q1.pop(), Q2.pop(); sum1 += v - u, sum2 += u - v;
            Q1.emplace(v), Q2.emplace(u);
        }
        dp[z][i] = ((i+1ll) * (Q1.top()) - sum1) + (sum2 - (i+1ll) * Q1.top());
    }
}


int main() {
    scanf("%d %d", &k, &n);
    for(int i = 0; i < n; ++i) {
        char a[3], b[3]; int c, d;
        scanf("%s %d %s %d", a, &c, b, &d);
        if(a[0] == b[0]) ans += abs(c - d);
        else vec.emplace_back(c, d);
    }
    sz = vec.size();
    if(!sz) return !printf("%lld\n", ans);
    ans += sz;
    sort(all(vec), [&](const pii &a, const pii &b) {
        return a.x + a.y < b.x + b.y;
    });
    solve_median(0);
    if(k == 1) return !printf("%lld\n", ans + dp[0][sz-1]);
    reverse(all(vec)); solve_median(1);
    long val = dp[0][sz-1];
    for(int i = 0; i < sz-1; ++i) val = min(val, dp[0][i] + dp[1][sz-i-2]);
    return !printf("%lld\n", ans + val);
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &k, &n);
     ~~~~~^~~~~~~~~~~~~~~~~
bridge.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s %d %s %d", a, &c, b, &d);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 256 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 412 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 300 KB Output is correct
9 Correct 3 ms 424 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 4 ms 384 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 4 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 45 ms 3952 KB Output is correct
13 Correct 78 ms 5520 KB Output is correct
14 Correct 61 ms 4204 KB Output is correct
15 Correct 55 ms 3568 KB Output is correct
16 Correct 41 ms 4792 KB Output is correct
17 Correct 80 ms 5484 KB Output is correct
18 Correct 50 ms 5100 KB Output is correct
19 Correct 72 ms 5472 KB Output is correct
20 Correct 64 ms 4972 KB Output is correct
21 Correct 75 ms 5224 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 352 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 29 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 3 ms 260 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 356 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 3 ms 256 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 3 ms 256 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 276 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 4 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 4 ms 384 KB Output is correct
21 Correct 4 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 3 ms 384 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 356 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 404 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 3 ms 384 KB Output is correct
20 Correct 4 ms 384 KB Output is correct
21 Correct 4 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 3 ms 384 KB Output is correct
25 Correct 69 ms 4748 KB Output is correct
26 Correct 68 ms 4876 KB Output is correct
27 Correct 91 ms 5668 KB Output is correct
28 Correct 111 ms 6276 KB Output is correct
29 Correct 109 ms 6408 KB Output is correct
30 Correct 52 ms 3592 KB Output is correct
31 Correct 58 ms 5644 KB Output is correct
32 Correct 100 ms 6280 KB Output is correct
33 Correct 87 ms 5920 KB Output is correct
34 Correct 96 ms 6248 KB Output is correct
35 Correct 55 ms 5800 KB Output is correct
36 Correct 96 ms 6068 KB Output is correct
37 Correct 38 ms 4748 KB Output is correct