Submission #1455174
Source Code Expand
#include <bits/stdc++.h> #define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++) #define REP(i,n) FOR(i,0,n) #define MOD 1000000007 #define int long long using namespace std; typedef long long ll; const int INF = 1e9; int N; int D[101010]; int A[101010], B[101010]; int Asum[101010]; signed main() { cin >> N; REP(i,N) cin >> D[i]; sort(D, D + N); REP(i,N) { A[i] = N - (lower_bound(D, D + N, 2 * D[i]) - D); //cout << A[i] << endl; Asum[i] = A[i]; B[i] = upper_bound(D, D + N, D[i] / 2) - D; //cout << B[D[i]] << endl; } for (int i=N-2; i>=0; i--) { Asum[i] += Asum[i+1]; } //REP(i,N) cout << Asum[i] << endl; int ans = 0; for (int i=1; i<N-1; i++) { int idx = lower_bound(D, D + N, 2 * D[i]) - D; ans += B[i] * Asum[idx]; ans %= MOD; } cout << ans << endl; }
Submission Info
Submission Time | |
---|---|
Task | B - 難易度 |
User | hiyokko2 |
Language | C++14 (GCC 5.4.1) |
Score | 100 |
Code Size | 926 Byte |
Status | AC |
Exec Time | 49 ms |
Memory | 3328 KB |
Judge Result
Set Name | Sample | Subtask1 | Subtask2 | ||||||
---|---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 50 / 50 | 50 / 50 | ||||||
Status |
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Set Name | Test Cases |
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Sample | sample_01.txt, sample_02.txt, sample_03.txt |
Subtask1 | sample_01.txt, sample_02.txt, sample_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt |
Subtask2 | sample_01.txt, sample_02.txt, sample_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask1_10.txt, subtask1_11.txt, subtask1_12.txt, subtask1_13.txt, subtask1_14.txt, subtask1_15.txt, subtask1_16.txt, subtask1_17.txt, subtask1_18.txt, subtask1_19.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt, subtask2_12.txt, subtask2_13.txt, subtask2_14.txt, subtask2_15.txt, subtask2_16.txt, subtask2_17.txt, subtask2_18.txt, subtask2_19.txt, subtask2_20.txt, subtask2_21.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
sample_01.txt | AC | 1 ms | 256 KB |
sample_02.txt | AC | 1 ms | 256 KB |
sample_03.txt | AC | 1 ms | 256 KB |
subtask1_01.txt | AC | 1 ms | 256 KB |
subtask1_02.txt | AC | 1 ms | 256 KB |
subtask1_03.txt | AC | 2 ms | 384 KB |
subtask1_04.txt | AC | 2 ms | 384 KB |
subtask1_05.txt | AC | 2 ms | 256 KB |
subtask1_06.txt | AC | 2 ms | 384 KB |
subtask1_07.txt | AC | 2 ms | 256 KB |
subtask1_08.txt | AC | 2 ms | 384 KB |
subtask1_09.txt | AC | 2 ms | 384 KB |
subtask1_10.txt | AC | 2 ms | 256 KB |
subtask1_11.txt | AC | 2 ms | 384 KB |
subtask1_12.txt | AC | 2 ms | 384 KB |
subtask1_13.txt | AC | 2 ms | 256 KB |
subtask1_14.txt | AC | 2 ms | 256 KB |
subtask1_15.txt | AC | 2 ms | 384 KB |
subtask1_16.txt | AC | 2 ms | 384 KB |
subtask1_17.txt | AC | 2 ms | 384 KB |
subtask1_18.txt | AC | 2 ms | 384 KB |
subtask1_19.txt | AC | 2 ms | 384 KB |
subtask2_01.txt | AC | 15 ms | 1152 KB |
subtask2_02.txt | AC | 13 ms | 1024 KB |
subtask2_03.txt | AC | 6 ms | 640 KB |
subtask2_04.txt | AC | 8 ms | 640 KB |
subtask2_05.txt | AC | 37 ms | 2688 KB |
subtask2_06.txt | AC | 33 ms | 2432 KB |
subtask2_07.txt | AC | 3 ms | 384 KB |
subtask2_08.txt | AC | 3 ms | 384 KB |
subtask2_09.txt | AC | 39 ms | 2816 KB |
subtask2_10.txt | AC | 24 ms | 1792 KB |
subtask2_11.txt | AC | 3 ms | 384 KB |
subtask2_12.txt | AC | 22 ms | 1664 KB |
subtask2_13.txt | AC | 4 ms | 512 KB |
subtask2_14.txt | AC | 29 ms | 2176 KB |
subtask2_15.txt | AC | 49 ms | 3328 KB |
subtask2_16.txt | AC | 47 ms | 3328 KB |
subtask2_17.txt | AC | 47 ms | 3328 KB |
subtask2_18.txt | AC | 47 ms | 3328 KB |
subtask2_19.txt | AC | 48 ms | 3328 KB |
subtask2_20.txt | AC | 27 ms | 3328 KB |
subtask2_21.txt | AC | 26 ms | 3328 KB |