結果
| 問題 |
No.1890 Many Sequences Sum Queries
|
| ユーザー |
trineutron
|
| 提出日時 | 2022-04-04 22:33:41 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 44 ms / 2,000 ms |
| コード長 | 772 bytes |
| コンパイル時間 | 1,796 ms |
| コンパイル使用メモリ | 193,596 KB |
| 最終ジャッジ日時 | 2025-01-28 15:07:08 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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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 d = mid - c_idx[l_idx - 1];
if (c[l_idx - 1] + d * (d + 1) / 2 >= s) {
r = mid;
} else {
l = mid;
}
}
if (c[n] < s or r > len) {
r = -1;
}
printf("%ld\n", r);
}
}
trineutron