Submission #321017

#	Time	Username	Problem	Language	Result	Execution time	Memory
321017		VROOM_VARUN	Wiring (IOI17_wiring)	C++14	0 / 100	66 ms	18252 KiB

wiring

/*
ID: varunra2
LANG: C++
TASK: wiring
*/

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

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define int long long

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e15
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

ll min_total_length(vector<int32_t> r, vector<int32_t> b) {
  VII vals;
  trav(x, r) vals.PB(MP(x, 0));
  trav(x, b) vals.PB(MP(x, 1));
  sort(all(vals));
  vals.insert(vals.begin(), MP(-INF, vals[0].y ^ 1));
  VI pref(sz(vals), 0);
  int n = sz(pref);
  for (int i = 1; i < n; i++) {
    pref[i] = vals[i].x;
  }
  partial_sum(all(pref), pref.begin());
  VI dp(n, INF);
  dp[0] = 0;
  int lft = 1, rt = 1;
  for (int i = 1; i < n; i++) {
    while (rt < n and vals[rt + 1].y == vals[i].y) rt++;
    for (int j = lft; j < i; j++) {
      dp[j] = min(dp[j], dp[j - 1] + vals[i].x - vals[j].x);
    }
    int val = dp[i - 1];
    int preff = 0;
    for (int j = i; j <= rt; j++) {
      int cnt = j - i + 1;
      preff += vals[j].x - vals[i - 1].x;
      if (cnt <= i - lft)
        val = min(val, dp[max(0ll, i - cnt - 1)] + cnt * vals[i - 1].x -
                           pref[i - 1] + pref[max(0ll, i - cnt - 1)]);
      dp[j] = preff + val;
    }
    lft = i;
    i = rt;
  }
  return dp.back();
}

// int32_t main() {
// #ifndef ONLINE_JUDGE
//   freopen("wiring.in", "r", stdin);
//   freopen("wiring.out", "w", stdout);
// #endif
//   cin.sync_with_stdio(0);
//   cin.tie(0);

//   int n, m;
//   cin >> n >> m;

//   vector<int32_t> r(n), b(m);

//   trav(x, r) cin >> x;
//   trav(x, b) cin >> x;

//   cout << min_total_length(r, b) << '\n';

//   return 0;
// }

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