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Submission #500856

# Submission time Handle Problem Language Result Execution time Memory
500856 2022-01-01T12:41:54 Z Halogen Palembang Bridges (APIO15_bridge) C++14
100 / 100
 108 ms 8680 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
typedef pair<int, int> ii;

main() {
    int K, N; scanf("%lld %lld", &K, &N);
    int ans = 0;
    vector<pair<int, int> > lst;
    
    for (int i = 0; i < N; i++) {
        char c1, c2;
        int i1, i2;
        scanf(" %c %lld %c %lld", &c1, &i1, &c2, &i2);
        if (c1 == c2) ans += abs(i2 - i1);
        else lst.emplace_back(i1, i2);
    }

    sort(lst.begin(), lst.end(), [](ii i, ii j) {
        return i.first + i.second < j.first + j.second;
    });

    N = lst.size();

    int pre[N + 5], suf[N + 5];
    memset(pre, 0, sizeof(pre));
    memset(suf, 0, sizeof(suf));

    int left = 0, right = 0;
    priority_queue<int> l;
    priority_queue<int, vector<int>, greater<int> > r;

    for (int i = 0; i < N; i++) {
        r.push(lst[i].first); r.push(lst[i].second);
        right += lst[i].first + lst[i].second;
        while (l.size() < r.size() || r.top() < l.top()) {
            right -= r.top();
            left += r.top();
            l.push(r.top()); r.pop();
        }
        while (l.size() > r.size()) {
            right += l.top();
            left -= l.top();
            r.push(l.top()); l.pop();
        }

        pre[i] = right - r.size() * l.top() + l.top() * l.size() - left;
    }

    left = right = 0;
    while (!r.empty()) r.pop();
    while (!l.empty()) l.pop();

    for (int i = N - 1; i >= 0; --i) {
        r.push(lst[i].first); r.push(lst[i].second);
        right += lst[i].first + lst[i].second;
        while (l.size() < r.size() || r.top() < l.top()) {
            right -= r.top();
            left += r.top();
            l.push(r.top()); r.pop();
        }
        while (l.size() > r.size()) {
            right += l.top();
            left -= l.top();
            r.push(l.top()); l.pop();
        }

        suf[i] = right - r.size() * l.top() + l.top() * l.size() - left;
    }

    int mini = min(suf[0], pre[N - 1]);
    
    // for (int i = 0; i < N; i++)
    //     printf("%lld %lld\n", pre[i], suf[i]);

    if (K == 1) {
        printf("%lld\n", mini + N + ans);
        return 0;
    }

    for (int i = 0; i < N - 1; i++)
        mini = min(mini, suf[i + 1] + pre[i]);

    printf("%lld\n", mini + N + ans);
}

Compilation message

bridge.cpp:7:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    7 | main() {
      | ^~~~
bridge.cpp: In function 'int main()':
bridge.cpp:8:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     int K, N; scanf("%lld %lld", &K, &N);
      |               ~~~~~^~~~~~~~~~~~~~~~~~~~~
bridge.cpp:15:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |         scanf(" %c %lld %c %lld", &c1, &i1, &c2, &i2);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 276 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 308 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 300 KB Output is correct
11 Correct 1 ms 336 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 2 ms 308 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 48 ms 7092 KB Output is correct
13 Correct 100 ms 8672 KB Output is correct
14 Correct 88 ms 7048 KB Output is correct
15 Correct 61 ms 4756 KB Output is correct
16 Correct 55 ms 8012 KB Output is correct
17 Correct 86 ms 8668 KB Output is correct
18 Correct 90 ms 8212 KB Output is correct
19 Correct 95 ms 8624 KB Output is correct
20 Correct 61 ms 8216 KB Output is correct
21 Correct 98 ms 8400 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 0 ms 204 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 292 KB Output is correct
3 Correct 0 ms 236 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 268 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 292 KB Output is correct
8 Correct 1 ms 288 KB Output is correct
9 Correct 1 ms 296 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 292 KB Output is correct
13 Correct 1 ms 296 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 292 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 280 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 312 KB Output is correct
24 Correct 1 ms 304 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 272 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 272 KB Output is correct
7 Correct 1 ms 272 KB Output is correct
8 Correct 0 ms 280 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 288 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 300 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 296 KB Output is correct
18 Correct 1 ms 296 KB Output is correct
19 Correct 1 ms 328 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 53 ms 7088 KB Output is correct
26 Correct 80 ms 7200 KB Output is correct
27 Correct 101 ms 8112 KB Output is correct
28 Correct 106 ms 8680 KB Output is correct
29 Correct 105 ms 8640 KB Output is correct
30 Correct 52 ms 4408 KB Output is correct
31 Correct 53 ms 7888 KB Output is correct
32 Correct 86 ms 8600 KB Output is correct
33 Correct 80 ms 8272 KB Output is correct
34 Correct 108 ms 8672 KB Output is correct
35 Correct 62 ms 8144 KB Output is correct
36 Correct 108 ms 8364 KB Output is correct
37 Correct 42 ms 7044 KB Output is correct