Submission #363977

#TimeUsernameProblemLanguageResultExecution timeMemory
363977MaisyDoge13A Huge Tower (CEOI10_tower)C++17
0 / 100
4 ms492 KiB
#include <iostream> #include <cstdio> #include <vector> #include <utility> #include <cmath> #include <climits> #include <algorithm> #include <array> #include <set> #include <map> using namespace std; #define input "tower.in" #define output "tower.out" #define int long long #define MOD (int)(1e9+9) int n, k; vector<int> a; signed main() { ios_base::sync_with_stdio(0); cin.tie(0); freopen(input, "r", stdin); freopen(output, "w", stdout); cin >> n >> k; a.reserve(n+1); for (int i=0;i<n;i++) { int x; cin >> x; a.push_back(x); } a.push_back(LLONG_MAX); sort(a.begin(), a.end()); int ans=1,r=1,l=0; while (r<=n) { //cout << "l r " << l << ' ' << r << endl; int blocks = r-l;//when this is the base and all the previous ones have been used, this is the size to build if (a[l]+k>a[r]) r++; else if (a[l]+k<=a[r]) { ans*=blocks; l++; if (r==l) r++; } } cout << ans%MOD << endl; }

Compilation message (stderr)

tower.cpp: In function 'int main()':
tower.cpp:21:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   21 |     freopen(input, "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
tower.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   22 |     freopen(output, "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
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