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HDU 5475An easy problem 离线set/线段树
阅读量:5094 次
发布时间:2019-06-13

本文共 2978 字,大约阅读时间需要 9 分钟。

An easy problem

Time Limit: 8000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)

Problem Description
One day, a useless calculator was being built by Kuros. Let's assume that number X is showed on the screen of calculator. At first, X = 1. This calculator only supports two types of operation.
1. multiply X with a number.
2. divide X with a number which was multiplied before.
After each operation, please output the number X modulo M.
 

 

Input
The first line is an integer T(
1T10), indicating the number of test cases.
For each test case, the first line are two integers Q and M. Q is the number of operations and M is described above. (1Q105,1M109)
The next Q lines, each line starts with an integer x indicating the type of operation.
if x is 1, an integer y is given, indicating the number to multiply. (0<y109)
if x is 2, an integer n is given. The calculator will divide the number which is multiplied in the nth operation. (the nth operation must be a type 1 operation.)
It's guaranteed that in type 2 operation, there won't be two same n.
 

 

Output
For each test case, the first line, please output "Case #x:" and x is the id of the test cases starting from 1.
Then Q lines follow, each line please output an answer showed by the calculator.
 

 

Sample Input
1 10 1000000000 1 2 2 1 1 2 1 10 2 3 2 4 1 6 1 7 1 12 2 7
 

 

Sample Output
Case #1: 2 1 2 20 10 1 6 42 504 84
 

 

Source
 
 
题解:考虑到取摸,离线做
或者线段树上搞
///1085422276#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
using namespace std ;typedef long long ll;#define mem(a) memset(a,0,sizeof(a))#define meminf(a) memset(a,127,sizeof(a));#define TS printf("111111\n");#define FOR(i,a,b) for( int i=a;i<=b;i++)#define FORJ(i,a,b) for(int i=a;i>=b;i--)#define READ(a,b,c) scanf("%d%d%d",&a,&b,&c)#define mod 1000000007#define inf 100000inline ll read(){ ll x=0,f=1; char ch=getchar(); while(ch<'0'||ch>'9') { if(ch=='-')f=-1; ch=getchar(); } while(ch>='0'&&ch<='9') { x=x*10+ch-'0'; ch=getchar(); } return x*f;}//****************************************struct ss{ int id,x; bool operator < (const ss &A)const { return id < A.id; }};#define maxn 100000+5set
s;set
::iterator it;int main(){ int oo=1; ll n,q,m,x[maxn],op[maxn],vis[maxn],ans[maxn],A[maxn]; int T=read(); while(T--) { scanf("%I64d%I64d",&n,&m); FOR(i,1,n) { scanf("%I64d%I64d",&op[i],&x[i]); } mem(vis); FOR(i,1,n) { if(op[i]==2)vis[x[i]]=1; } mem(ans); ans[0]=1; FOR(i,1,n) { ans[i]=ans[i-1]; if(op[i]==1&&!vis[i]) { ans[i]=(ans[i]*x[i])%m; } } //cout<
<
=1; i--) { ll tmp=1; for(it=s.begin(); it!=s.end(); it++) { if((*it).id>i)break; tmp*=(*it).x; tmp%=m; } A[i]=(ans[i]*tmp)%m; if(op[i]==2) { ss g; g.id=x[i]; g.x=x[x[i]]; s.insert(g); } } printf("Case #%d:\n",oo++); for(int i=1; i<=n; i++) cout<
<
代码

 

 

 

转载于:https://www.cnblogs.com/zxhl/p/4847701.html

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