GCC 超时-白红宇

GCC 超时

阅读量：4035 次

发布时间：2019-05-24

本文共 1452 字，大约阅读时间需要 4 分钟。

1、

2、GCC

Time Limit: 1000MS Memory limit: 65536K

题目描述

The GNU Compiler Collection (usually shortened to GCC) is a compiler system produced by the GNU Project supporting various programming languages. But it doesn’t contains the math operator “!”.

In mathematics the symbol represents the factorial operation. The expression n! means "the product of the integers from 1 to n". For example, 4! (read four factorial) is 4 × 3 × 2 × 1 = 24. (0! is defined as 1, which is a neutral element in multiplication, not multiplied by anything.)

We want you to help us with this formation: (0! + 1! + 2! + 3! + 4! + ... + n!)%m.

输入

The first line consists of an integer T, indicating the number of test cases.

Each test on a single consists of two integer n and m.

0 < T <= 20

0 <= n < 10

¹⁰⁰(without leading zero)

0 < m < 1000000

输出

Output the answer of (0! + 1! + 2! + 3! + 4! + ... + n!)%m.

示例输入

1 10 861017

示例输出

3、超时代码：

#include
   
    #include
    
     int dp[1000005];int jie(int n){    int ans=1;    if(dp[n]!=0)    return dp[n];    for(int i=n;i>=1;i--)    {        if(dp[i]!=0)        {            ans*=dp[i];            break;        }        else        ans*=i;    }    return ans;}int main(){    int t,n,m;    scanf("%d",&t);    memset(dp,0,sizeof(dp));    for(int i=0;i
     
      m)        n=m-1;        for(int j=0;j<=n;j++)        {            dp[j]=jie(j);            sum+=dp[j]%m;        }        printf("%lld\n",sum%m);    }    return 0;}

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