Submission #889077

#	Time	Username	Problem	Language	Result	Execution time	Memory
889077		StefanL2005	Paint By Numbers (IOI16_paint)	C++14	59 / 100	1 ms	600 KiB

paint

#include <bits/stdc++.h>
using namespace std;
ifstream in("file.in");

void rewrite(int poz, int last, char c, string &s)
{
    for (int i = poz - last + 1; i <= poz; i++)
        s[i] = c;
}
string solve_puzzle(string s, vector<int> c)
{
    int n = s.length(), k = c.size();
    string ans;
    vector<pair<int,int>> range(k);
    ans.assign(n, '_');
    int l = 0, poz = 0;

    //left range (min range)
    for (int i = 0; i < n && poz < k; i++)
    {
        if (s[i] == '_')
            l = 0;
        else
            l++;
        
        if (l == c[poz])
        {
            range[poz].first = i + 1 - l;
            l = 0;
            i++; poz++;
        }
    }
    //right range (max range)
    l = 0;
    poz = k - 1;

    for (int i = n - 1; i >= 0 && poz >= 0; i--)
    {
        if (s[i] == '_')
            l = 0;
        else
            l++;
        if (l == c[poz])
        {
            range[poz].second = i + l - 1;
            l = 0;
            i--; poz--;
        }
    }

    for (int i = 0; i < k; i++)
    {
        l = 0;
        for (int j = range[i].first; j <= range[i].second; j++)
        {
            if (s[j] == '_')
            {
                if (l < c[i])
                    rewrite(j, l, '_', ans);
                l = 0; 
                continue;
            }
            l++;

            if (l == c[i])
                rewrite(j, l, '?', ans);
            if (l > c[i])
                ans[j] = '?';
        }  
        int same = c[i] - (range[i].second - range[i].first + 1 - c[i]);

        for (int j = range[i].first + c[i] - 1; j >= range[i].first; j--)
        {
            if (same <= 0)
                break;
            ans[j] = 'X';
            same--;
        }
    }

    return ans;   
}

• Subtask 1: 7 / 7
• Subtask 2: 3 / 3
• Subtask 3: 22 / 22
• Subtask 4: 27 / 27
• Subtask 5: 0 / 21
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10