ural 1613【hash+二分】

来源：互联网发布：许巍和汪峰知乎编辑：程序博客网时间：2024/05/16 03:50

http://acm.timus.ru/problem.aspx?space=1&num=1613

hash+二分，其中hash可以用STL里面的map实现。开始没注意到原来那个序号是有序的！！！所以用vector就ok

#include <vector>#include <list>#include <map>#include <set>#include <queue>#include <string.h>#include <deque>#include <stack>#include <bitset>#include <algorithm>#include <functional>#include <numeric>#include <utility>#include <sstream>#include <iostream>#include <iomanip>#include <cstdio>#include <cmath>#include <cstdlib>#include <limits.h>using namespace std;#define LL long long#define pi acos(-1)#define N  5000#define INF INT_MAX#define eps 1e-8//*********************************************//ural 1613//*********************************************map<int,vector<int> > mp;int main(){    //freopen("a.txt","r",stdin);    int n;    while(scanf("%d",&n)!=EOF)    {        int i,j,k;        for(i=1;i<=n;i++)        {            int a;            scanf("%d",&a);            mp[a].push_back(i);        }        int m;        scanf("%d",&m);        while(m--)        {            int l,r,z;            scanf("%d%d%d",&l,&r,&z);            int sz=mp[z].size();            if(sz==0)            {                printf("0");                continue;            }            int flag=0;            int low=0,up=sz-1,mid;            while(low<=up)            {                mid=(low+up)>>1;                if(mp[z][mid]>=l && mp[z][mid]<=r)                {                    flag=1;                    break;                }                if(mp[z][mid]<l)                low=mid+1;                if(mp[z][mid]>r)                up=mid-1;            }            if(flag)printf("1");            else            printf("0");        }        printf("\n");        mp.clear();    }    return 0;}