Submission #592428

#	Time	Username	Problem	Language	Result	Execution time	Memory
592428		web	A Huge Tower (CEOI10_tower)	C++17	85 / 100	1094 ms	49996 KiB

tower

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

constexpr long long mod = 1000000009;
long long numWaysTower(vector<long>& blocks, int index,const long D)
{
    if(index == blocks.size())
        return 1;
    else
    {
        long long numWaysPrev = numWaysTower(blocks, index+1,D);
        long long validPositions =1;
        for(int i = index+1; i < blocks.size(); ++i)
        {
            if(blocks[index] <= blocks[i] + D)
                validPositions++;
        }
        return ((validPositions%mod)*(numWaysPrev%mod))%mod;
    }
}

int main()
{
    long N,D;cin>>N>>D;
    vector<long> blocks(N);
    for(int i =0; i<N; ++i)
        cin>>blocks[i];
    sort(blocks.rbegin(), blocks.rend());
    cout<<numWaysTower(blocks, 0, D)<<endl;
    return 0;
}

Compilation message (stderr)

tower.cpp: In function 'long long int numWaysTower(std::vector<long int>&, int, long int)':
tower.cpp:10:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     if(index == blocks.size())
      |        ~~~~~~^~~~~~~~~~~~~~~~
tower.cpp:16:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         for(int i = index+1; i < blocks.size(); ++i)
      |                              ~~^~~~~~~~~~~~~~~

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