oj.uz

Submission #418167

# Submission time Handle Problem Language Result Execution time Memory
418167 2021-06-05T07:27:58 Z usachevd0 Sky Walking (IOI19_walk) C++17
15 / 100
 174 ms 17284 KB 
#include <bits/stdc++.h>
#ifndef LOCAL
    #include "walk.h"
#endif

using namespace std;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define Time (clock() * 1.0 / CLOCKS_PER_SEC)
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
using ld = long double;
template<typename T1, typename T2> bool chkmin(T1& x, T2 y) {
    return y < x ? (x = y, true) : false;
}
template<typename T1, typename T2> bool chkmax(T1& x, T2 y) {
    return y > x ? (x = y, true) : false;
}
void debug_out() {
    cerr << endl;
}
template<typename T1, typename... T2> void debug_out(T1 A, T2... B) {
    cerr << ' ' << A;
    debug_out(B...);
}
template<typename T> void mdebug_out(T* a, int n) {
    for (int i = 0; i < n; ++i)
        cerr << a[i] << ' ';
    cerr << endl;
}
#ifdef LOCAL
    #define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
    #define mdebug(a, n) cerr << #a << ": ", mdebug_out(a, n)
#else
    #define debug(...) 1337
    #define mdebug(a, n) 1337
#endif
template<typename T> ostream& operator << (ostream& stream, const vector<T>& v) {
    for (auto& x : v)
        stream << x << ' ';
    return stream;
}
template<typename T1, typename T2> ostream& operator << (ostream& stream, const pair<T1, T2>& p) {
    return stream << p.first << ' ' << p.second;
}

const ll INF64 = 1e18;
const int maxN = 100005;
int n, m;
vector<int> bg[maxN], en[maxN];
ll V[maxN];

namespace dsu {
    int q[maxN];
    
    void init() {
        memset(q, 255, sizeof q);
    }
    int gt(int x) {
        return q[x] < 0 ? x : q[x] = gt(q[x]);
    }
    bool join(int x, int y) { // y is the parent of x
        x = gt(x), y = gt(y);
        if (x == y) return false;
        //if (-q[x] > -q[y]) swap(x, y);
        q[y] += q[x];
        q[x] = y;
        return true;
    }
}

ll min_distance(vector<int> X, vector<int> H, vector<int> L, vector<int> R, vector<int> Y, int SI, int TI) {
    n = X.size(), m = L.size();
    assert(SI == 0 && TI == n - 1);
    
    for (int j = 0; j < m; ++j) {
        int l = L[j], r = R[j];
        bg[l].push_back(j);
        en[r].push_back(j);
    }
    
    
    
    dsu::init();
    fill(V, V + m, INF64);
    auto gv = [&](int j) -> ll {
        // return V[j];
        int r = dsu::gt(j);
        return V[r] + Y[r] - Y[j];
    };
    
    set<pii> a;
    for (int j : bg[0]) {
        int y = Y[j];
        a.insert({y, j});
        V[j] = y;
    }
    
    set<pii> needUp;
    for (int i = 1; i < n; ++i) {
        if (a.empty()) return -1;
        
        while (!needUp.empty()) {
            int y = -needUp.begin()->fi;
            if (y > H[i]) break;
            int j = needUp.begin()->se;
            needUp.erase(needUp.begin());
            auto it = a.upper_bound({Y[j], j});
            if (it != a.end() && it->fi <= H[i]) {
                ll fv = it->fi - Y[j] + gv(it->se);
                if (fv <= V[j]) {
                    V[j] = fv;
                    dsu::join(j, it->se);
                }
            }
        }
        
        for (int j : bg[i]) {
            V[j] = +INF64;
            auto it = a.lower_bound({Y[j], -1});
            if (it != a.begin()) {
                auto pit = prev(it);
                chkmin(V[j], Y[j] - pit->fi + gv(pit->se));
            }
            if (it != a.end() && it->fi <= H[i]) {
                ll fv = it->fi - Y[j] + gv(it->se);
                if (fv <= V[j]) {
                    V[j] = fv;
                    dsu::join(j, it->se);
                }
            }
            else if (it != a.end())
                needUp.insert({it->fi, j});
            a.insert({Y[j], j});
        }
        if (i == n - 1) break;
        for (int j : en[i]) {
            int y = Y[j];
            a.erase({y, j});
        }
        
        // debug(i);
        // for (auto el : a) cerr << el << ' ' << gv(el.se) << "  "; cerr << endl;
    }
    ll ans = INF64;
    for (auto& [y, j] : a) {
        chkmin(ans, X[n - 1] - X[0] + y + gv(j));
    }
    return ans;
}


#ifdef LOCAL

int32_t main() {
#ifdef LOCAL
    freopen("in", "r", stdin);
#endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    
        int n, m;
    assert(2 == scanf("%d%d", &n, &m));
    vector<int> x(n), h(n);
    for (int i = 0; i < n; i++)
        assert(2 == scanf("%d%d", &x[i], &h[i]));
    vector<int> l(m), r(m), y(m);
    for (int i = 0; i < m; i++)
        assert(3 == scanf("%d%d%d", &l[i], &r[i], &y[i]));
    int s, g;
    assert(2 == scanf("%d%d", &s, &g));
    fclose(stdin);

    long long result = min_distance(x, h, l, r, y, s, g);

    printf("%lld\n", result);
    fclose(stdout);
    
    return 0;
}

#endif

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 8 ms 9932 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 9932 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 7956 KB Output is correct
2 Correct 92 ms 9764 KB Output is correct
3 Correct 108 ms 10308 KB Output is correct
4 Correct 148 ms 14228 KB Output is correct
5 Correct 174 ms 17184 KB Output is correct
6 Correct 170 ms 15892 KB Output is correct
7 Correct 80 ms 11284 KB Output is correct
8 Correct 111 ms 16268 KB Output is correct
9 Correct 161 ms 17284 KB Output is correct
10 Correct 108 ms 15992 KB Output is correct
11 Correct 14 ms 6164 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 7956 KB Output is correct
2 Correct 92 ms 9764 KB Output is correct
3 Correct 108 ms 10308 KB Output is correct
4 Correct 148 ms 14228 KB Output is correct
5 Correct 174 ms 17184 KB Output is correct
6 Correct 170 ms 15892 KB Output is correct
7 Correct 80 ms 11284 KB Output is correct
8 Correct 111 ms 16268 KB Output is correct
9 Correct 161 ms 17284 KB Output is correct
10 Correct 108 ms 15992 KB Output is correct
11 Correct 14 ms 6164 KB Output is correct
12 Correct 105 ms 10308 KB Output is correct
13 Correct 81 ms 13972 KB Output is correct
14 Correct 171 ms 17072 KB Output is correct
15 Correct 133 ms 14100 KB Output is correct
16 Correct 126 ms 13972 KB Output is correct
17 Correct 127 ms 14084 KB Output is correct
18 Correct 133 ms 13988 KB Output is correct
19 Correct 125 ms 13992 KB Output is correct
20 Correct 84 ms 11352 KB Output is correct
21 Correct 28 ms 6980 KB Output is correct
22 Correct 108 ms 12224 KB Output is correct
23 Correct 111 ms 12548 KB Output is correct
24 Correct 109 ms 13712 KB Output is correct
25 Correct 108 ms 12532 KB Output is correct
26 Correct 119 ms 15772 KB Output is correct
27 Correct 174 ms 16912 KB Output is correct
28 Correct 84 ms 13916 KB Output is correct
29 Correct 162 ms 15956 KB Output is correct
30 Correct 78 ms 11412 KB Output is correct
31 Correct 159 ms 17216 KB Output is correct
32 Correct 97 ms 15180 KB Output is correct
33 Incorrect 103 ms 16032 KB Output isn't correct
34 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Runtime error 8 ms 9932 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -