結果
問題 |
No.1890 Many Sequences Sum Queries
|
ユーザー |
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提出日時 | 2022-04-04 22:32:13 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 67 ms / 2,000 ms |
コード長 | 829 bytes |
コンパイル時間 | 2,354 ms |
コンパイル使用メモリ | 192,280 KB |
最終ジャッジ日時 | 2025-01-28 15:06:58 |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 25 |
コンパイルメッセージ
main.cpp: In function ‘int main()’: main.cpp:5:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 5 | scanf("%ld%ld", &n, &q); | ~~~~~^~~~~~~~~~~~~~~~~~ main.cpp:8:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 8 | scanf("%ld", &a[i]); | ~~~~~^~~~~~~~~~~~~~ main.cpp:20:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 20 | scanf("%ld", &s); | ~~~~~^~~~~~~~~~~
ソースコード
#include <bits/stdc++.h> int main() { long n, q, len = 0; scanf("%ld%ld", &n, &q); long a[100]; for (long i = 0; i < n; i++) { scanf("%ld", &a[i]); len += a[i]; } long c_idx[101], c[101]; c_idx[0] = 0; c[0] = 0; for (long i = 0; i < n; i++) { c_idx[i + 1] = c_idx[i] + a[i]; c[i + 1] = std::min(1000000000L, c[i] + a[i] * (a[i] + 1) / 2); } for (long i = 0; i < q; i++) { long s; scanf("%ld", &s); long l_idx = std::lower_bound(c, c + n + 1, s) - c; long l = c_idx[l_idx - 1], r = c_idx[l_idx]; while (r - l > 1) { long mid = (l + r) / 2; long k = std::upper_bound(c_idx, c_idx + n + 1, mid) - c_idx; long d = mid - c_idx[k - 1]; if (c[k - 1] + d * (d + 1) / 2 >= s) { r = mid; } else { l = mid; } } if (c[n] < s or r > len) { r = -1; } printf("%ld\n", r); } }