NOI.AC

ID	题目	提交者	结果	用时	内存	语言	文件大小	提交时间	测评时间
#214634	#2477. 狸猫的数	KXG	50	316ms	78636kb	C++11	692b	2024-11-20 21:18:52	2024-11-20 23:07:52

answer

#include <cstdio>
using namespace std;
const long long mod = 998244353;
int lowbit(int i) {
    return i & (-i);
}
int change(int i) {
    return i / lowbit(i);
}
long long dp[10000010];
long long inv2 = (mod + 1) / 2;
int main() {
    int l, r;
    long long ans = 0;
    scanf("%d%d", &l, &r);
    dp[1] = 2;
    for (int i = 2; i <= r; i++) {
        if (lowbit(i) == 1) {
            dp[i] = (dp[change(i + lowbit(i))] + dp[change(i - lowbit(i))]) * inv2 % mod + 1;
        } else {
            dp[i] = dp[change(i)];
        }
    }
    for (int i = l; i <= r; i++) {
        ans += dp[i];
        ans %= mod;
    }
    printf("%lld\n", ans);
    return 0;
}

源文件, 语言: C++11

详细

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Test #1:

score: 10

Accepted

time: 0ms

memory: 512kb

input:

2 20

output:

249561151

result:

ok single line: '249561151'

Test #2:

score: 10

Accepted

time: 0ms

memory: 508kb

input:

2 99

output:

62390703

result:

ok single line: '62390703'

Test #3:

score: 10

Accepted

time: 122ms

memory: 78636kb

input:

2 10000000

output:

761228612

result:

ok single line: '761228612'

Test #4:

score: 10

Accepted

time: 105ms

memory: 78632kb

input:

6224 9999999

output:

364267526

result:

ok single line: '364267526'

Test #5:

score: 10

Accepted

time: 89ms

memory: 64916kb

input:

233 8244453

output:

766249426

result:

ok single line: '766249426'

Test #6:

score: 0

Runtime Error

input:

19260817 19260917

output:

result:

Test #7:

score: 0

Runtime Error

input:

19260817 998244353

output:

result:

Test #8:

score: 0

Runtime Error

input:

233 999244353

output:

result:

Test #9:

score: 0

Runtime Error

input:

233 1000000007

output:

result:

Test #10:

score: 0

Runtime Error

input:

1 2000000007