Submission #1274725

#	Time	Username	Problem	Language	Result	Execution time	Memory
1274725		baotoan655	Pinball (JOI14_pinball)	C++20	100 / 100	202 ms	22800 KiB

pinball

#include <bits/stdc++.h>
#define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
using namespace std;

const int N = 3e5 + 5;
int n, m;
int a[N], b[N], c[N], d[N];

struct SEG {
    struct node {
        long long mn = 1e18;
        node() {}
        node operator + (const node& o) const {
            node res;
            res.mn = min(mn, o.mn);
            return res;
        }
    } it[N << 2];
    SEG() {
        for(int i = 0; i < (N << 2); ++i) it[i] = node();
    }
    void update(int k, int l, int r, int pos, long long val) {
        if(l == r) {
            it[k].mn = min(it[k].mn, val);
            return;
        }
        int mid = l + r >> 1;
        if(pos <= mid) update(k << 1, l, mid, pos, val);
        else update(k << 1 | 1, mid + 1, r, pos, val);
        it[k] = it[k << 1] + it[k <<1  | 1];
    }
    long long get(int k, int l, int r,int u, int v) {
        if(l > v || r < u) return 1e18;
        if(u <= l && r <= v) return it[k].mn;
        int mid = l + r >> 1;
        return min(get(k << 1, l, mid, u, v), get(k << 1 | 1, mid + 1, r, u, v));
    }
} sl, sr;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    file("A") else file("task");
    cin >> m >> n;
    int sz;
    long long ans = 1e18;
    vector<int> zip;
    for(int i = 1; i <= m; ++i) {
        cin >> a[i] >> b[i] >> c[i] >> d[i];
        zip.emplace_back(a[i]);
        zip.emplace_back(b[i]);
        zip.emplace_back(c[i]);
    }
    zip.emplace_back(1);
    zip.emplace_back(n);
    sort(zip.begin(), zip.end());
    zip.resize(unique(zip.begin(), zip.end()) - zip.begin());
    sz = zip.size();
    sl.update(1, 1, sz, 1, 0);
    sr.update(1, 1, sz, sz, 0);
    for(int i = 1; i <= m; ++i) {
        a[i] = lower_bound(zip.begin(), zip.end(), a[i]) - zip.begin() + 1;
        b[i] = lower_bound(zip.begin(), zip.end(), b[i]) - zip.begin() + 1;
        c[i] = lower_bound(zip.begin(), zip.end(), c[i]) - zip.begin() + 1;
        long long cl = sl.get(1, 1, sz, a[i], b[i]);
        long long cr = sr.get(1, 1, sz, a[i], b[i]);
        ans = min(ans, cl + cr + d[i]);
        sl.update(1, 1, sz, c[i], cl + d[i]);
        sr.update(1, 1, sz, c[i], cr + d[i]);
    }
    if(ans > (long long)1e17) ans = -1;
    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'int main()':
pinball.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:44:5: note: in expansion of macro 'file'
   44 |     file("A") else file("task");
      |     ^~~~
pinball.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:44:5: note: in expansion of macro 'file'
   44 |     file("A") else file("task");
      |     ^~~~
pinball.cpp:2:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:44:20: note: in expansion of macro 'file'
   44 |     file("A") else file("task");
      |                    ^~~~
pinball.cpp:2:91: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    2 | #define file(name)  if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
pinball.cpp:44:20: note: in expansion of macro 'file'
   44 |     file("A") else file("task");
      |                    ^~~~

• Subtask 1: 11 / 11
• Subtask 2: 18 / 18
• Subtask 3: 22 / 22
• Subtask 4: 49 / 49