Bayan 2015 Contest Warm Up D. CGCDSSQ (math,pair,map,暴力)
哎,只能转题解了,,,
8165031 | 2014-10-10 15:53:42 | njczy2010 | D - CGCDSSQ | GNU C++ | Accepted | 156 ms | 27584 KB |
8163765 | 2014-10-10 13:03:56 | njczy2010 | D - CGCDSSQ | GNU C++ | Time limit exceeded on test 10 | 2000 ms | 32600 KB |
8163761 | 2014-10-10 13:02:38 | njczy2010 | D - CGCDSSQ | GNU C++ | Time limit exceeded on test 10 | 2000 ms | 31600 KB |
8163755 | 2014-10-10 13:01:12 | njczy2010 | D - CGCDSSQ | GNU C++ | Wrong answer on test 9 | 46 ms | 19700 KB |
8163749 | 2014-10-10 12:59:54 | njczy2010 | D - CGCDSSQ | GNU C++ | Wrong answer on test 9 | 31 ms | 2100 KB |
2 seconds
256 megabytes
standard input
standard output
Given a sequence of integers a1, ..., an and q queries x1, ..., xq on it. For each query xi you have to count the number of pairs (l, r) such that 1 ≤ l ≤ r ≤ n and gcd(al, al + 1, ..., ar) = xi.
is a greatest common divisor of v1, v2, ..., vn, that is equal to a largest positive integer that divides all vi.
The first line of the input contains integer n, (1 ≤ n ≤ 105), denoting the length of the sequence. The next line contains n space separated integers a1, ..., an, (1 ≤ ai ≤ 109).
The third line of the input contains integer q, (1 ≤ q ≤ 3 × 105), denoting the number of queries. Then follows q lines, each contain an integer xi, (1 ≤ xi ≤ 109).
For each query print the result in a separate line.
3 2 6 3 5 1 2 3 4 6
1 2 2 0 1
7 10 20 3 15 1000 60 16 10 1 2 3 4 5 6 10 20 60 1000
14 0 2 2 2 0 2 2 1 1
题解以代码转自:http://blog.csdn.net/accelerator_/article/details/39892385
D:记录下gcd,每次多一个数字,就和前面的数字都取gcd,然后合并掉,下次利用这些已有的gcd去做,然后合并的过程要利用到gcd的递减性质,就可以直接从头往后找即可
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<queue>
#include<map>
#include<set>
#include<string>
//#include<pair> #define N 1000005
#define M 1000005
#define mod 1000000007
//#define p 10000007
#define mod2 100000000
#define ll long long
#define LL long long
#define maxi(a,b) (a)>(b)? (a) : (b)
#define mini(a,b) (a)<(b)? (a) : (b) using namespace std; int n,q;
int a[N];
map<int,ll>ans;
typedef pair<int,ll>PP;
PP save[N];
int tot; int gcd(int x,int y)
{
if(y==)
return x;
return gcd(y,x%y);
} void ini()
{
int i;
ans.clear();
tot=;
for(i=;i<=n;i++){
scanf("%d",&a[i]);
}
} void solve()
{
int i,j;
int sn;
for(i=;i<=n;i++){
for(j=;j<tot;j++){
save[j].first=gcd(save[j].first,a[i]);
}
save[tot]=make_pair(a[i],);
tot++;
sn=;
for(j=;j<tot;j++){
if(save[sn].first==save[j].first){
save[sn].second+=save[j].second;
}
else{
sn++;
save[sn]=save[j];
}
}
sn++;
tot=sn;
for(j=;j<tot;j++){
ans[ save[j].first ]+=save[j].second;
}
}
} void out()
{
int x;
scanf("%d",&q);
while(q--){
scanf("%d",&x);
printf("%I64d\n",ans[x]);
}
} int main()
{
//freopen("data.in","r",stdin);
//freopen("data.out","w",stdout);
// scanf("%d",&T);
// for(int ccnt=1;ccnt<=T;ccnt++)
// while(T--)
while(scanf("%d",&n)!=EOF)
{
//if(n==0 && k==0 ) break;
//printf("Case %d: ",ccnt);
ini();
solve();
out();
} return ;
}
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