oj.uz

답안 #543442

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
543442 2022-03-30T15:18:56 Z SmolBrain Fuel Station (NOI20_fuelstation) C++17
43 / 100
 304 ms 52444 KB 
// Om Namah Shivaya
// GM in 125 days

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define endl '\n'
#define pb push_back
#define conts continue
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "YES" << endl
#define no cout << "NO" << endl
#define ff first
#define ss second
#define ceil2(x,y) ((x+y-1) / (y))
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#ifndef ONLINE_JUDGE
#define debug(x) cout << #x <<" = "; print(x); cout << endl
#else
#define debug(x)
#endif

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

bool iseven(ll n) {if ((n & 1) == 0) return true; return false;}

void print(ll t) {cout << t;}
void print(int t) {cout << t;}
void print(string t) {cout << t;}
void print(char t) {cout << t;}
void print(double t) {cout << t;}
void print(ld t) {cout << t;}

template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(pair <T, V> p) {cout << "{"; print(p.ff); cout << ","; print(p.ss); cout << "}";}
template <class T> void print(vector <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T> void print(set <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T> void print(multiset <T> v) {cout << "[ "; for (T i : v) {print(i); cout << " ";} cout << "]";}
template <class T, class V> void print(map <T, V> v) {cout << "[ "; for (auto i : v) {print(i); cout << " ";} cout << "]";}
template<typename T> void amin(T &a, T b) { a = min(a, b); }
template<typename T> void amax(T &a, T b) { a = max(a, b); }

void usaco(string filename) {
    freopen((filename + ".in").c_str(), "r", stdin);
    freopen((filename + ".out").c_str(), "w", stdout);
}

const int MOD = 1e9 + 7;
const int maxn = 1e5 + 5;
const int inf1 = 1e9 + 5;
const ll inf2 = ll(1e18) + 5;

template<typename T>
struct segtree {
    /*=======================================================*/

    struct data {
        ll sum, mnpref;
    };

    data neutral = {0, inf2};

    void merge(data &curr, data &left, data &right) {
        curr.sum = left.sum + right.sum;
        curr.mnpref = min(left.mnpref, left.sum + right.mnpref);
    }

    void create(int x, int lx, int rx, T v) {
        tr[x] = {v, v};
    }

    void modify(int x, int lx, int rx, T v) {
        tr[x] = {v, v};
    }

    /*=======================================================*/

    int siz = 1;
    vector<data> tr;

    segtree(int n) {
        init(n);
    }

    segtree() {

    };

    void init(int n) {
        while (siz < n) siz *= 2;
        tr.assign(2 * siz, neutral);
    }

    void build(vector<T> &a, int n, int x, int lx, int rx) {
        if (rx - lx == 1) {
            if (lx < n) {
                create(x, lx, rx, a[lx]);
            }

            return;
        }

        int mid = (lx + rx) / 2;

        build(a, n, 2 * x + 1, lx, mid);
        build(a, n, 2 * x + 2, mid, rx);

        merge(tr[x], tr[2 * x + 1], tr[2 * x + 2]);
    }

    void build(vector<T> &a, int n) {
        build(a, n, 0, 0, siz);
    }

    void pupd(int i, T v, int x, int lx, int rx) {
        if (rx - lx == 1) {
            modify(x, lx, rx, v);
            return;
        }

        int mid = (lx + rx) / 2;

        if (i < mid) {
            pupd(i, v, 2 * x + 1, lx, mid);
        }
        else {
            pupd(i, v, 2 * x + 2, mid, rx);
        }

        merge(tr[x], tr[2 * x + 1], tr[2 * x + 2]);
    }

    void pupd(int i, T v) {
        pupd(i, v, 0, 0, siz);
    }

    data query(int l, int r, int x, int lx, int rx) {
        if (lx >= r or rx <= l) return neutral;
        if (lx >= l and rx <= r) return tr[x];

        int mid = (lx + rx) / 2;

        data curr;
        data left = query(l, r, 2 * x + 1, lx, mid);
        data right = query(l, r, 2 * x + 2, mid, rx);

        merge(curr, left, right);
        return curr;
    }

    data query(int l, int r) {
        return query(l, r + 1, 0, 0, siz);
    }
};

void solve(int test_case)
{
    ll n, d; cin >> n >> d;
    vector<array<ll, 3>> a(n);
    rep(i, n) rep(j, 3) cin >> a[i][j];

    sort(all(a));

    vector<ll> diff(n + 5);
    diff[0] = a[0][0];
    rep1(i, n - 1) diff[i] = a[i][0] - a[i - 1][0];
    diff[n] = d - a[n - 1][0];

    auto check = [&](ll f) {
        ll prev = 0, fuel = f;

        rep(i, n) {
            auto [x, add, mx] = a[i];
            ll dis = x - prev;
            fuel -= dis;

            if (fuel < 0) {
                return false;
            }

            if (f <= mx) {
                fuel += add;
            }

            prev = x;
        }

        ll dis = d - prev;
        fuel -= dis;

        if (fuel < 0) return false;

        return true;
    };

    vector<ll> b(n);
    rep(i, n) b[i] = a[i][0];

    sort(all(b));
    auto it = unique(all(b));
    b.resize(it - b.begin());

    segtree<ll> st(2 * n + 5);
    rep(i, n + 1) st.pupd(2 * (i + 1), -diff[i]);

    ll ans = d;

    vector<array<ll, 3>> c(n);
    rep(i, n) {
        auto [x, toadd, mx] = a[i];
        x = lower_bound(all(b), x) - b.begin() + 1;
        c[i] = {mx, x, toadd};
    }

    sort(rall(c));

    ll l = -1, r = -1;

    rep(i, n) {
        auto [mx, x, toadd] = c[i];
        st.pupd(2 * x + 1, toadd);

        ll f = mx;
        st.pupd(0, f);

        ll mnpref = st.query(0, 2 * n + 2).mnpref;
        if (mnpref < 0) conts;

        amin(ans, f - mnpref);

        // if (mnpref >= 0) {
        //     if (i + 1 < n) {
        //         l = c[i + 1][0] + 1;
        //     }
        //     else {
        //         l = 1;
        //     }

        //     r = f;
        //     debug(l);
        //     debug(r);

        //     while (l <= r) {
        //         ll mid = (l + r) / 2;
        //         st.pupd(0, mid);

        //         mnpref = st.query(0, 2 * n + 2).mnpref;

        //         if (mnpref >= 0) {
        //             amin(ans, f);
        //             r = mid - 1;
        //         }
        //         else {
        //             l = mid + 1;
        //         }
        //     }

        //     st.pupd(0, 20);
        //     debug(st.query(0, 2 * n + 2).mnpref);
        // }
    }

    cout << ans << endl;

    // if (l == -1) {
    //     cout << ans << endl;
    //     return;
    // }

    // while (l <= r) {
    //     ll mid = (l + r) / 2;
    //     if (check(mid)) {
    //         amin(ans, mid);
    //         r = mid - 1;
    //     }
    //     else {
    //         l = mid + 1;
    //     }
    // }

    // cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;
    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Compilation message

FuelStation.cpp: In function 'void solve(int)':
FuelStation.cpp:189:10: warning: variable 'check' set but not used [-Wunused-but-set-variable]
  189 |     auto check = [&](ll f) {
      |          ^~~~~
FuelStation.cpp:237:8: warning: unused variable 'l' [-Wunused-variable]
  237 |     ll l = -1, r = -1;
      |        ^
FuelStation.cpp:237:16: warning: unused variable 'r' [-Wunused-variable]
  237 |     ll l = -1, r = -1;
      |                ^
FuelStation.cpp: In function 'void usaco(std::string)':
FuelStation.cpp:64:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |     freopen((filename + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
FuelStation.cpp:65:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |     freopen((filename + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 291 ms 52300 KB Output is correct
2 Correct 297 ms 52428 KB Output is correct
3 Correct 293 ms 52324 KB Output is correct
4 Incorrect 298 ms 52436 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 9 ms 2112 KB Output is correct
3 Correct 9 ms 2004 KB Output is correct
4 Correct 12 ms 2100 KB Output is correct
5 Correct 11 ms 2116 KB Output is correct
6 Correct 9 ms 2004 KB Output is correct
7 Correct 9 ms 2124 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 324 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 9 ms 2120 KB Output is correct
15 Correct 9 ms 2004 KB Output is correct
16 Correct 9 ms 2088 KB Output is correct
17 Correct 9 ms 2004 KB Output is correct
18 Correct 9 ms 2132 KB Output is correct
19 Correct 9 ms 2116 KB Output is correct
20 Correct 8 ms 2132 KB Output is correct
21 Correct 9 ms 2132 KB Output is correct
22 Correct 11 ms 2120 KB Output is correct
23 Correct 10 ms 2108 KB Output is correct
24 Correct 9 ms 2012 KB Output is correct
25 Correct 9 ms 2100 KB Output is correct

Subtask #4
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 9 ms 2112 KB Output is correct
3 Correct 9 ms 2004 KB Output is correct
4 Correct 12 ms 2100 KB Output is correct
5 Correct 11 ms 2116 KB Output is correct
6 Correct 9 ms 2004 KB Output is correct
7 Correct 9 ms 2124 KB Output is correct
8 Correct 1 ms 316 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 324 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 9 ms 2120 KB Output is correct
15 Correct 9 ms 2004 KB Output is correct
16 Correct 9 ms 2088 KB Output is correct
17 Correct 9 ms 2004 KB Output is correct
18 Correct 9 ms 2132 KB Output is correct
19 Correct 9 ms 2116 KB Output is correct
20 Correct 8 ms 2132 KB Output is correct
21 Correct 9 ms 2132 KB Output is correct
22 Correct 11 ms 2120 KB Output is correct
23 Correct 10 ms 2108 KB Output is correct
24 Correct 9 ms 2012 KB Output is correct
25 Correct 9 ms 2100 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 293 ms 52336 KB Output is correct
28 Correct 300 ms 52332 KB Output is correct
29 Correct 296 ms 52300 KB Output is correct
30 Correct 297 ms 52320 KB Output is correct
31 Correct 293 ms 52332 KB Output is correct
32 Correct 304 ms 52316 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 1 ms 320 KB Output is correct
39 Correct 288 ms 52340 KB Output is correct
40 Correct 294 ms 52296 KB Output is correct
41 Correct 301 ms 52444 KB Output is correct
42 Correct 297 ms 52332 KB Output is correct
43 Correct 294 ms 52416 KB Output is correct
44 Incorrect 278 ms 52296 KB Output isn't correct
45 Halted 0 ms 0 KB -

Subtask #5
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 316 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 1 ms 320 KB Output is correct
25 Correct 1 ms 320 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 316 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 9 ms 2112 KB Output is correct
18 Correct 9 ms 2004 KB Output is correct
19 Correct 12 ms 2100 KB Output is correct
20 Correct 11 ms 2116 KB Output is correct
21 Correct 9 ms 2004 KB Output is correct
22 Correct 9 ms 2124 KB Output is correct
23 Correct 1 ms 316 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 212 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 324 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 9 ms 2120 KB Output is correct
30 Correct 9 ms 2004 KB Output is correct
31 Correct 9 ms 2088 KB Output is correct
32 Correct 9 ms 2004 KB Output is correct
33 Correct 9 ms 2132 KB Output is correct
34 Correct 9 ms 2116 KB Output is correct
35 Correct 8 ms 2132 KB Output is correct
36 Correct 9 ms 2132 KB Output is correct
37 Correct 11 ms 2120 KB Output is correct
38 Correct 10 ms 2108 KB Output is correct
39 Correct 9 ms 2012 KB Output is correct
40 Correct 9 ms 2100 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 9 ms 2128 KB Output is correct
43 Correct 11 ms 2124 KB Output is correct
44 Correct 9 ms 2248 KB Output is correct
45 Correct 10 ms 2264 KB Output is correct
46 Correct 12 ms 2260 KB Output is correct
47 Correct 10 ms 2260 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 212 KB Output is correct
53 Correct 1 ms 212 KB Output is correct
54 Correct 10 ms 2260 KB Output is correct
55 Correct 10 ms 2260 KB Output is correct
56 Correct 15 ms 2260 KB Output is correct
57 Correct 15 ms 2160 KB Output is correct
58 Correct 12 ms 2264 KB Output is correct
59 Correct 10 ms 2120 KB Output is correct
60 Correct 10 ms 2252 KB Output is correct
61 Incorrect 9 ms 2256 KB Output isn't correct
62 Halted 0 ms 0 KB -

Subtask #7
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 316 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 1 ms 320 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 320 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 291 ms 52300 KB Output is correct
17 Correct 297 ms 52428 KB Output is correct
18 Correct 293 ms 52324 KB Output is correct
19 Incorrect 298 ms 52436 KB Output isn't correct
20 Halted 0 ms 0 KB -