Submission #961572

#	Time	Username	Problem	Language	Result	Execution time	Memory
961572		Unforgettablepl	Skyscraper (JOI16_skyscraper)	C++17	5 / 100	2063 ms	448 KiB

skyscraper

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

#define int long long

const int modulo = 1e9+7;

bool check(int L,vector<int> &arr){
    for(int i=1;i<arr.size();i++){
        L-=abs(arr[i]-arr[i-1]);
    }
    return 0<=L;
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,l;
    cin >> n >> l;
    vector<int> arr(n);
    for(int&i:arr)cin>>i;
    sort(arr.begin(),arr.end());
    int ans = 0;
    do {
        if(check(l,arr))ans++;
    } while(next_permutation(arr.begin(),arr.end()));
    cout << ans%modulo << '\n';
}

Compilation message (stderr)

skyscraper.cpp: In function 'bool check(long long int, std::vector<long long int>&)':
skyscraper.cpp:9:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=1;i<arr.size();i++){
      |                 ~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 80