Submission #1158849

#	Time	Username	Problem	Language	Result	Execution time	Memory
1158849		CodeLakVN	Pilot (NOI19_pilot)	C++17	100 / 100	334 ms	38992 KiB

pilot

#include <bits/stdc++.h>
using namespace std;

#define task "PILOT"
#define FOR(i, a, b) for (int i = (a); i <= (b); i++)
#define FOD(i, a, b) for (int i = (a); i >= (b); i--)
#define F first
#define S second

const int N = (int)1e6 + 6;

int n, q;
pair<int, int> mountains[N], planes[N];

int s[N], e[N];
long long ans[N];

int main() {
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    cin >> n >> q;
    FOR(i, 1, n) {
        cin >> mountains[i].F;
        mountains[i].S = i;
    }
    FOR(i, 1, q) {
        cin >> planes[i].F;
        planes[i].S = i;
    }

    sort(mountains + 1, mountains + n + 1);
    sort(planes + 1, planes + q + 1);

    memset(s, 0, sizeof(s));
    memset(e, 0, sizeof(e));

    long long cur = 0;
    int i = 1;
    FOR(j, 1, q) {
        while (i <= n && mountains[i].F <= planes[j].F) {
            int id = mountains[i].S;
            // cout << "mountain: " << id << ", " << mountains[i].F << "\n";

            if (s[id - 1] == 0 && e[id + 1] == 0) {
                s[id] = e[id] = id;
                cur++;
            }
            else if (s[id - 1] && e[id + 1]) {
                cur += 1LL * (e[id + 1] - (id + 1) + 2) * ((id - 1) - s[id - 1] + 2);
                e[s[id - 1]] = e[id + 1];
                s[e[id + 1]] = s[id - 1];
            }
            else if (s[id - 1] && !e[id + 1]) {
                cur += 1LL * ((id - 1) - s[id - 1] + 2);
                e[s[id - 1]] = e[id] = id;
                s[id] = s[id - 1];
            }
            else if (!s[id - 1] && e[id + 1]) {
                cur += 1LL * (e[id + 1] - (id + 1) + 2);
                s[id] = s[e[id + 1]] = id;
                e[id] = e[id + 1];
            }

            // cout << "cur: " << cur << "\n";

            i++;
        }
        ans[planes[j].S] = cur;
    }

    FOR(j, 1, q) cout << ans[j] << "\n"; 

    return 0;
}

Compilation message (stderr)

pilot.cpp: In function 'int main()':
pilot.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
pilot.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 3 / 3
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 5 / 5
• Subtask 6: 9 / 9
• Subtask 7: 14 / 14
• Subtask 8: 10 / 10
• Subtask 9: 11 / 11
• Subtask 10: 11 / 11