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Submission #770631

# Submission time Handle Problem Language Result Execution time Memory
770631 2023-07-01T14:37:09 Z Enchom Gap (APIO16_gap) C++14
100 / 100
 40 ms 1908 KB 
#include <iostream>
#include <stdio.h>
#include <vector>
#include "gap.h"
using namespace std;
typedef long long llong;

const llong MAXVAL = 1000000000000000000LL;

llong solveSmall(int N)
{
    llong minVal, maxVal;
    llong L = 0, R = MAXVAL;
    int pL = 0, pR = N - 1;
    vector<llong> nums(N);

    while(pL <= pR)
    {
        MinMax(L, R, &minVal, &maxVal);

        nums[pL] = minVal;
        nums[pR] = maxVal;
        pL++;
        pR--;

        L = minVal + 1;
        R = maxVal - 1;
    }

    llong ans = 0;
    for (int i = 1; i < nums.size(); i++)
    {
        ans = max(ans, nums[i] - nums[i - 1]);
    }

    return ans;
}

llong solveBig(int N)
{
    llong minVal, maxVal;
    llong curVal, endVal;
    llong bestGap = 0;

    MinMax(0, MAXVAL, &curVal, &endVal);

    llong curGap = (endVal - curVal) / (N - 1);
    if ( (endVal - curVal) % (N - 1) != 0 )
        curGap++;
    curGap--;

    bestGap = curGap;
    while(curVal != endVal)
    {
        MinMax(curVal + 1, curVal + curGap, &minVal, &maxVal);

        if (minVal == -1)
        {
            bestGap = max(bestGap, curGap);
            curGap = curGap * 2 + 2;
        }
        else
        {
            bestGap = max(bestGap, minVal - curVal);
            curGap = bestGap;
            curVal = maxVal;
        }
    }

    return bestGap;
}

llong findGap(int T, int N)
{
    if (T == 1)
        return solveSmall(N);
    else
        return solveBig(N);
}

/*
int main()
{

}
*/

Compilation message

gap.cpp: In function 'llong solveSmall(int)':
gap.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     for (int i = 1; i < nums.size(); i++)
      |                     ~~^~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 0 ms 208 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 9 ms 716 KB Output is correct
17 Correct 8 ms 720 KB Output is correct
18 Correct 8 ms 604 KB Output is correct
19 Correct 8 ms 708 KB Output is correct
20 Correct 6 ms 616 KB Output is correct
21 Correct 36 ms 1820 KB Output is correct
22 Correct 31 ms 1864 KB Output is correct
23 Correct 31 ms 1820 KB Output is correct
24 Correct 31 ms 1872 KB Output is correct
25 Correct 28 ms 1872 KB Output is correct
26 Correct 30 ms 1872 KB Output is correct
27 Correct 30 ms 1828 KB Output is correct
28 Correct 32 ms 1908 KB Output is correct
29 Correct 31 ms 1836 KB Output is correct
30 Correct 26 ms 1872 KB Output is correct
31 Correct 0 ms 208 KB Output is correct
32 Correct 0 ms 208 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Correct 0 ms 208 KB Output is correct
4 Correct 0 ms 208 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 0 ms 208 KB Output is correct
7 Correct 1 ms 208 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 1 ms 208 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 5 ms 428 KB Output is correct
17 Correct 5 ms 464 KB Output is correct
18 Correct 5 ms 464 KB Output is correct
19 Correct 5 ms 552 KB Output is correct
20 Correct 3 ms 464 KB Output is correct
21 Correct 18 ms 1068 KB Output is correct
22 Correct 19 ms 1068 KB Output is correct
23 Correct 25 ms 1080 KB Output is correct
24 Correct 19 ms 1080 KB Output is correct
25 Correct 40 ms 976 KB Output is correct
26 Correct 19 ms 1068 KB Output is correct
27 Correct 19 ms 1188 KB Output is correct
28 Correct 26 ms 1024 KB Output is correct
29 Correct 25 ms 1056 KB Output is correct
30 Correct 11 ms 976 KB Output is correct
31 Correct 0 ms 208 KB Output is correct
32 Correct 1 ms 208 KB Output is correct