Codeforces Round #481 (Div. 3) C. Letters

C. Letters

Example 1
input
3 6
10 15 12
1 9 12 23 26 37
output
1 1
1 9
2 2
2 13
3 1
3 12

Example 2
input
2 3
5 10000000000
5 6 9999999999
output
1 5
2 1
2 9999999994

题目大意:

题目大意:
假设宿舍a,b,c分别有1,2,3间房间,如果有一份邮件上写着3说明就是b宿舍的第二间房间的信,而题目就是给你一个信封上的数字,
让你输出寝室号和房间号

分析:

分析:
先对有所房间数做前缀和,用lower_bound去搜信封上的数字,lower_bound出来的位子就是这个寝室号,房间号也就很轻松的算出来了。

code:

#define debug
#include<bits/stdc++.h>
#define pb push_back
#define dbg(x) cout<<#x<<" = "<<(x)<<endl;
#define lson l,m,rt<<1
#define cmm(x) cout<<"("<<(x)<<")";
#define rson m+1,r,rt<<1|1
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll>PLL;
typedef pair<int,ll>Pil;
const ll INF = 0x3f3f3f3f;
const ll inf=0x7fffffff;
const double eps=1e-8;
const int maxn =1e6+10;
const int N = 510;
const ll mod=1e9+7;
const ll MOD=1e9;
//------
//define
ll a[maxn];
ll ev[maxn];
ll sum[maxn];
//solve
void solve() {
	int n,m;
	while(cin>>n>>m) {
		for(int i=1;i<=n;i++){
			cin>>a[i];
			sum[i]=sum[i-1]+a[i];
		//	cout<<sum[i]<<" ";
		}
		//cout<<endl;
		for(int i=1;i<=m;i++){
			cin>>ev[i];
		}
		for(int i=1;i<=m;i++){
			int p=lower_bound(sum+1,sum+1+n,ev[i])-sum+1-1;
			cout<<p<<" "<<a[p]-sum[p]+ev[i]<<endl;
		}
	}

}

int main() {
	ios_base::sync_with_stdio(false);
#ifdef debug
	freopen("in.txt", "r", stdin);
//	freopen("out.txt","w",stdout);
#endif
	cin.tie(0);
	cout.tie(0);
	solve();
	/*
		#ifdef debug
			fclose(stdin);
			fclose(stdout);
			system("out.txt");
		#endif
	*/
	return 0;
}

  

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转载自www.cnblogs.com/visualVK/p/9038417.html