Submission #333635

#	Time	Username	Problem	Language	Result	Execution time	Memory
333635		blue	Rice Hub (IOI11_ricehub)	C++17	49 / 100	20 ms	2284 KiB

ricehub

#include "ricehub.h"
#include <vector>
using namespace std;

int besthub(int R, int L, int X[], long long B) //fields, max coordinate, i'th field, budget
{
    int fields = R;

    vector<long long> F(R+2);
    F[0] = -(2e16 + 1);
    F[R+1] = (4e16 + 1);
    for(int i = 1; i <= R; i++) F[i] = X[i-1];

    int l = 1; //leftmost field
    int m = 1; //hub
    int r = 1; //rightmost field
    long long c = 0; //current cost
    int res = 1; //running result

    while(1)
    {
        if(F[r+1] - F[m] + c <= B)
        {
            c += F[r+1] - F[m];
            r++;
        }
        else if(F[m] - F[l] > F[r+1] - F[m])
        {
            c -= (F[m] - F[l]);
            l++;
        }
        else if(m < R)
        {//l * * m m1 * r
            /*if(F[m+1] - F[m] > B)
            {
                l = m = r = m+1;
                c = 0;
                continue;
            }*///IMPORTANT

            c += (F[m+1] - F[m]) * ((m - (l - 1)) - (r - m));
            m++;
            while(c > B)
            {
                c -= F[m] - F[l];
                l++;
            }
        }
        else break;
        res = max(res, r - l + 1);
    }
    return res;
}

Compilation message (stderr)

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:7:9: warning: unused variable 'fields' [-Wunused-variable]
    7 |     int fields = R;
      |         ^~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 32 / 32