Submission #366593

#	Time	Username	Problem	Language	Result	Execution time	Memory
366593		parsabahrami	Pinball (JOI14_pinball)	C++17	100 / 100	452 ms	25964 KiB

pinball

// Call my Name and Save me from The Dark
#include <bits/stdc++.h>
 
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second
#define lc                          id << 1
#define rc                          lc | 1

const int N = 3e5 + 10;
ll seg[2][N << 2], ret = 1e18; int n, m, A[N], B[N], C[N], D[N];
vector<int> vec;

void upd(int p, ll x, int t, int id = 1, int l = 0, int r = SZ(vec)) {
    if (r - l < 2) {
        seg[t][id] = min(seg[t][id], x);
        return;
    }
    int mid = (l + r) >> 1;
    if (p < mid) upd(p, x, t, lc, l, mid);
    else upd(p, x, t, rc, mid, r);
    seg[t][id] = min(seg[t][lc], seg[t][rc]);
}

ll get(int ql, int qr, int t, int id = 1, int l = 0, int r = SZ(vec)) {
    if (qr <= l || r <= ql) return 1e18;
    if (ql <= l && r <= qr) return seg[t][id];
    int mid = (l + r) >> 1;
    return min(get(ql, qr, t, lc, l, mid), get(ql, qr, t, rc, mid, r));
}

int main() {
    scanf("%d%d", &m, &n);
    if (n == 1) return !printf("0\n");
    for (int i = 1; i <= m; i++) {
        scanf("%d%d%d%d", &A[i], &B[i], &C[i], &D[i]);
        vec.push_back(A[i]);
        vec.push_back(B[i]);
        vec.push_back(C[i]);
    }
    sort(vec.begin(), vec.end());
    vec.resize(unique(vec.begin(), vec.end()) - vec.begin());
    if (vec.back() < n || vec[0] > 1) return !printf("-1\n");
    fill(seg[0], seg[0] + N * 4, 1e18), fill(seg[1], seg[1] + N * 4, 1e18);
    upd(0, 0, 0), upd(SZ(vec) - 1, 0, 1);
    for (int i = 1; i <= m; i++) {
        int a = lower_bound(vec.begin(), vec.end(), A[i]) - vec.begin();
        int b = lower_bound(vec.begin(), vec.end(), B[i]) - vec.begin();
        int c = lower_bound(vec.begin(), vec.end(), C[i]) - vec.begin();
        int d = D[i];
        upd(c, get(a, b + 1, 0) + d, 0), upd(c, get(a, b + 1, 1) + d, 1);
        //printf("%lld %lld\n", get(c, c + 1, 0), get(c, c + 1, 1));
        ret = min(ret, d + get(a, b + 1, 0) + get(a, b + 1, 1));
    }
    printf("%lld\n", ret == 1e18 ? -1 : ret);
    return 0;
}

Compilation message (stderr)

pinball.cpp: In function 'int main()':
pinball.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("%d%d", &m, &n);
      |     ~~~~~^~~~~~~~~~~~~~~~
pinball.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |         scanf("%d%d%d%d", &A[i], &B[i], &C[i], &D[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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