Submission #1023862

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023862		Forested	Wiring (IOI17_wiring)	C++17	7 / 100	1063 ms	13248 KiB

wiring

#include <bits/stdc++.h>
using namespace std;

using i32 = int;
using i64 = long long;
template <typename T>
using V = vector<T>;
template <typename T>
using VV = V<V<T>>;
template <typename T>
using VVV = V<V<V<T>>>;

#define OVERLOAD4(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, l, r) for (i32 i = (i32)(l); i < (i32)(r); ++i)
#define REP(...) OVERLOAD4(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER2(i, n) for (i32 i = (i32)(n)-1; i >= 0; --i)
#define PER3(i, l, r) for (i32 i = (i32)(r)-1; i >= (i32)(l); --i)
#define PER(...) OVERLOAD4(__VA_ARGS__, PER3, PER2)(__VA_ARGS__)
#define ALL(x) begin(x), end(x)
#define LEN(x) (i32) size(x)

template <typename T>
bool chmin(T &x, const T &y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}

void dbg(i32 x) { cerr << x; }
void dbg(i64 x) { cerr << x; }
template <typename T>
void dbg(const V<T> &arr) {
    cerr << "[";
    REP(i, LEN(arr)) {
        if (i) {
            cerr << ", ";
        }
        dbg(arr[i]);
    }
    cerr << "]";
}

void debug() {}
template <typename Head, typename... Tail>
void debug(const Head &head, const Tail &...tail) {
    dbg(head);
    if (sizeof...(Tail)) {
        cerr << ", ";
    } else {
        cerr << '\n';
    }
    debug(tail...);
}

#ifdef DEBUGF
#define DBG(...)                       \
    do {                               \
        cerr << #__VA_ARGS__ << " : "; \
        debug(__VA_ARGS__);            \
    } while (false)
#else
#define DBG(...) (void)0
#endif

#include "wiring.h"

constexpr i64 INF = 3003003003003003003;

i64 min_total_length(V<i32> r, V<i32> b) {
    i32 n = LEN(r), m = LEN(b);
    V<pair<i64, bool>> pts;
    {
        i32 rit = 0, bit = 0;
        while (LEN(pts) < n + m) {
            if (bit == m || (rit < n && r[rit] < b[bit])) {
                pts.emplace_back(r[rit++], false);
            } else {
                pts.emplace_back(b[bit++], true);
            }
        }
    }
    V<i64> dp(2 * (n + m) + 1, INF);
    dp[n + m] = 0;
    REP(i, n + m) {
        auto [x, b] = pts[i];
        V<i64> ndp(LEN(dp), INF);
        if (b) {
            REP(j, LEN(dp)) {
                REP(k, j) {
                    chmin(ndp[k], dp[j]);
                }
            }
        } else {
            REP(j, LEN(dp)) {
                REP(k, j + 1, LEN(dp)) {
                    chmin(ndp[k], dp[j]);
                }
            }
        }
        if (i != n + m - 1) {
            i64 nxt = pts[i + 1].first;
            REP(j, LEN(ndp)) {
                ndp[j] += abs(j - (n + m)) * (nxt - x);
            }
        }
        dp = ndp;
        DBG(dp);
    }
    i64 ans = dp[n + m];
    return ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45