Submission #1276192

#TimeUsernameProblemLanguageResultExecution timeMemory
1276192wedonttalkanymorePinball (JOI14_pinball)C++20
0 / 100
1 ms332 KiB
#include <bits/stdc++.h> /* Brute to win */ using namespace std; using ll = long long; #define int long long #define pii pair<ll, ll> #define fi first #define se second const ll N = 2e5 + 5, inf = 1e18, mod = 1e9 + 7, block = 320, lim = 19; int m, n, sz; struct item { int l, r, x, c; }; item a[N]; vector <int> comp; struct ST { vector <int> st; ST(int _n) { st.assign(4 * (_n + 1), inf); } void update(int i, int l, int r, int pos, int val) { if (l == r) { st[i] = val; return; } int mid = (l + r) / 2; if (pos <= mid) update(2 * i, l, mid, pos, val); else update(2 * i + 1, mid + 1, r, pos, val); st[i] = min(st[2 * i], st[2 * i + 1]); } int get(int i, int l, int r, int u, int v) { if (u > r || v < l) return inf; if (u <= l && r <= v) return st[i]; int mid = (l + r) / 2; return min(get(2 * i, l, mid, u, v), get(2 * i + 1, mid + 1, r, u, v)); } }; signed main() { ios::sync_with_stdio(false); cin.tie(0); if (fopen(".inp", "r")) { freopen(".inp", "r", stdin); freopen(".out", "w", stdout); } cin >> m >> n; comp.push_back(1); comp.push_back(n); for (int i = 1; i <= m; i++) { cin >> a[i].l >> a[i].r >> a[i].x >> a[i].c; comp.push_back(a[i].l); comp.push_back(a[i].r); comp.push_back(a[i].x); } sort(comp.begin(), comp.end()); comp.erase(unique(comp.begin(), comp.end()), comp.end()); sz = comp.size(); for (int i = 1; i <= m; i++) { a[i].l = lower_bound(comp.begin(), comp.end(), a[i].l) - comp.begin() + 1; a[i].r = lower_bound(comp.begin(), comp.end(), a[i].r) - comp.begin() + 1; a[i].x = lower_bound(comp.begin(), comp.end(), a[i].x) - comp.begin() + 1; } ST st(sz), st1(sz); st.update(1, 1, sz, 1, 0); st1.update(1, 1, sz, sz, 0); int ans = inf; for (int i = 1; i <= m; i++) { auto val = st.get(1, 1, sz, a[i].l, a[i].r); if (val < inf) st.update(1, 1, sz, a[i].x, val + a[i].c); auto val1 = st1.get(1, 1, sz, a[i].l, a[i].r); if (val1 < inf) st1.update(1, 1, sz, a[i].x, val1 + a[i].c); if (val < inf && val1 < inf) ans = min(ans, val + val1 + a[i].c); } cout << (ans >= inf ? -1 : ans); return 0; }

Compilation message (stderr)

pinball.cpp: In function 'int main()':
pinball.cpp:49:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |         freopen(".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
pinball.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |         freopen(".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
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