Submission #1064201

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064201		Ignut	Wiring (IOI17_wiring)	C++17	10 / 100	639 ms	156960 KiB

wiring

// Ignut

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const ll INF = 1e18 + 123;
const int N = 1e5 + 123;

map<int, ll> dp[N];

void Renew(int i1, int j1, int i2, int j2, ll add) {
    if (!dp[i1].count(j1)) dp[i1][j1] = INF;
    if (!dp[i2].count(j2)) dp[i2][j2] = INF;
    dp[i1][j1] = min(dp[i1][j1], dp[i2][j2] + add);
}

ll min_total_length(vector<int> r, vector<int> b) {
    int n = r.size(), m = b.size();
    dp[0][0] = 0;
    int d = 10;
    for (int i = 0; i <= n; i ++) {
        int pos = lower_bound(b.begin(), b.end(), (i == 0 ? 0 : r[i - 1])) - b.begin();
        int lo = max(0, pos - d);
        int hi = min(m, pos + d);
        for (int j = lo; j <= hi; j ++) {
            if (i < n && j > 0)
                Renew(i + 1, j, i, j, abs(r[i] - b[j - 1]));
            if (j < m && i > 0)
                Renew(i, j + 1, i, j, abs(r[i - 1] - b[j]));
            if (i < n && j < m)
                Renew(i + 1, j + 1, i, j, abs(r[i] - b[j]));
        }
                
        pos = lower_bound(b.begin(), b.end(), i == m ? r[i - 1] : r[i]) - b.begin();
        lo = max(0, pos - d);
        hi = min(m, pos + d);
        for (int j = lo; j <= hi; j ++) {
            if (i < n && j > 0)
                Renew(i + 1, j, i, j, abs(r[i] - b[j - 1]));
            if (j < m && i > 0)
                Renew(i, j + 1, i, j, abs(r[i - 1] - b[j]));
            if (i < n && j < m)
                Renew(i + 1, j + 1, i, j, abs(r[i] - b[j]));
        }
    }
    return dp[n][m];
}

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