Submission #473129

#	Time	Username	Problem	Language	Result	Execution time	Memory
473129		SaraMostafa	ZigZag (COCI17_zigzag)	C++14	80 / 80	73 ms	11104 KiB

zigzag

#include <bits/stdc++.h>
#include<unordered_map>
using namespace std;
#define ll long long
#define endl "\n"
#define Sara ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
const long long mod=1e9+7;
const double PI=acos(-1);
// 1 2 3 --> 1,2,3 ...1,2..1,3..1..2,3..2..3..none (2 power number of elements)
//1 2 3 --> 2--> 1,2..1,3..2,3..(!n/(r!(n-r)!)) aka:ncr
// 1 2 3 -->2-->1,2..2,1..1,3..3,1..2,3..3,2..(n!/(n-r)!) aka:npr
//1 2 3--> 1..1,2..1,2,3..2..2,3..3  number of subarrays -->(n*(n+1))/2 "sum of numbers from 1 to n."
/*
ll power(ll x,ll y)
{
    if(y==0)
        return 1;
    else if(y==1)
        return x%mod;
    ll  r=power(x%mod,((y%mod)/2)%mod);
    if(y%2==0)
        return ((r%mod)*(r%mod));
    else
        return ((r%mod)*(r%mod)*(x%mod));
}

ll inverse(ll md,ll x)
{
    return power(x%mod,mod-2);
}

*/
int main()
{
    //freopen("input.in","r",stdin);

    Sara

    int k,n;
    cin>>k>>n;
    vector<string>v(k);
    map<char,vector<string>>mp;
    for(int i=0; i<k; i++)
    {
        cin>>v[i];
        mp[v[i][0]].push_back(v[i]);
    }

    vector<char>c(n);
    for(char i='a';i<='z';i++){
    sort(mp[i].begin(),mp[i].end());
    }
    map<char,int>id;
    for(char i='a';i<='z';i++){
        id[i]=0;
    }
    for(int i=0; i<n; i++)
    {
        cin>>c[i];
        int sz=mp[c[i]].size();
        int now=id[c[i]];
        if(now>=sz) id[c[i]]=0;
        cout<<mp[c[i]][id[c[i]]]<<endl;
        id[c[i]]++;

    }
    return 0;
}

• Subtask 1: 80 / 80