BC - Zball in Tina Town (质数 + 找规律)

Zball in Tina Town

Accepts: 541

Submissions: 2463

Time Limit: 3000/1500 MS (Java/Others)

Memory Limit: 262144/262144 K (Java/Others)

问题描述

Tina Town 是一个善良友好的地方,这里的每一个人都互相关心。
Tina有一个球,它的名字叫zball。zball很神奇,它会每天变大。在第一天的时候,它会变大11倍。在第二天的时候,它会变大22倍。在第nn天的时候,它会变大nn倍。
zball原来的体积是11。Tina想知道,zball在第n-1n?1天时的体积对nn取模是多大呢?
Tina是一个蠢蠢的女孩子,当然不会算啦,所以她请你帮她算出这个答案呢。

输入描述

第一行一个正整数TT,表示数据组数
接下来TT行,每行一个正整数nn,意义如题面所述
T \leq 10^5,2 \leq n \leq 10^9T≤10?5??,2≤n≤10?9??

输出描述

对于每组数据,输出一个正整数,表示答案。

输入样例

2
3
10

输出样例

2
0
此题纯粹找规律
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <vector>
#include <queue>
#include <cmath>
using namespace std;
typedef long long LL;
int T,n;
int fn(int x) {
    if(x == 1) return 1;
    else if(x == 4)return 2;
    for(int i = 2; i * i <= x; i ++) {
        if(x % i == 0) return 0;
    }
    return x - 1;
}
int main() {
    scanf("%d", &T);
    while(T --) {
        scanf("%d", &n);
        printf("%d\n",fn(n));
    }
    return 0;
}

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时间: 08-13

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