Submission #314245

#	Time	Username	Problem	Language	Result	Execution time	Memory
314245		lauran	Pinball (JOI14_pinball)	C++14	0 / 100	4 ms	384 KiB

pinball

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

const ll INF = 1e17;
const int NMAX = 1e5 + 5;

int m, n;
int A[NMAX], B[NMAX], C[NMAX], D[NMAX];
ll dpst[NMAX], dpdr[NMAX];

int main()
{
   cin >> m >> n;
   for (int i = 1; i <= m; i++) {
      cin >> A[i] >> B[i] >> C[i] >> D[i];
   }

   if (A[1] == 1)
      dpst[1] = D[1];
   else
      dpst[1] = INF;
   if (B[1] == n)
      dpdr[1] = D[1];
   else
      dpdr[1] = INF;

   for (int i = 2; i <= n; i++) {
      // dpst[i] = min{dpst[j] + d[i], cu C[j] intre A[i] si B[i]}
      dpst[i] = INF;
      if (A[i] == 1)
         dpst[i] = D[i];
      else for (int j = i - 1; j >= 1; j--)
         if (A[i] <= C[j] && C[j] <= B[i])
            dpst[i] = min(dpst[i], dpst[j] + D[i]);

      dpdr[i] = INF;
      if (B[i] == n)
         dpdr[i] = D[i];
      else for (int j = i - 1; j >= 1; j--)
         if (A[i] <= C[j] && C[j] <= B[i])
            dpdr[i] = min(dpdr[i], dpdr[j] + D[i]);
   }

   ll ans = INF;
   for (int i = 1; i <= n; i++)
      ans = min(ans, dpst[i] + dpdr[i] - D[i]);
   cout << ans;


   return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 49