Codeforces17A 题意: 有一种素数会等于两个相邻的素数相加 如果在2~n的范围内有至少k个这样的素数,就YES,否则就NO; 思路: 采用直接打表,后面判断一下就好了.那个预处理素数表还是满赞的~~ 不多说,上code-----. #include<bits/stdc++.h> #include<string.h> using namespace std; typedef long long LL; typedef unsigned long long ULL; con…
I - 9 Time Limit:1000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 327B Description Iahub and Iahubina went to a date at a luxury restaurant. Everything went fine until paying for the food. Instead o…
题意: 要生产n个物品,每个花费时间为x. 有两种魔法,每种最多使用1个. 其中第一种魔法可以使每个物品生产的花费时间变为ai,相应的花费是bi;第二种魔法可以减少ci个物品,相应的花费是di,并且保证对于i<j ci<=cj 且 di<=dj; #include<bits/stdc++.h> using namespace std; ],c[],d[]; pair<]; long long inf=0x3f3f3f3f3f3f3f3f; int main() { lo…
Lottery CodeForces - 589I Today Berland holds a lottery with a prize — a huge sum of money! There are kpersons, who attend the lottery. Each of them will receive a unique integer from 1 to k. The organizers bought n balls to organize the lottery, eac…
You are given qq queries in the following form: Given three integers lili, riri and didi, find minimum positive integer xixi such that it is divisible by didi and it does not belong to the segment [li,ri][li,ri]. Can you answer all the queries? Recal…