Submission #92618

#	Time	Username	Problem	Language	Result	Execution time	Memory
92618		turbat	Paint By Numbers (IOI16_paint)	C++14	0 / 100	66 ms	82552 KiB

paint

    #include "paint.h"
    #include <bits/stdc++.h>
    using namespace std;
    #define N 200005
     
    int n, t, ok, now, cnt[N], l[105], r[105], dp[N][105];
    string ans, st;
    vector <int> ve;
     
    void rec(int x, int idx){
    	if (dp[x][idx] != -1) return;
    	if (!idx){
    		if (x + 1 >= ve[0] && !cnt[x - ve[0]] && (idx != t - 1 || !(cnt[n - 1] - cnt[x])) ) {
    			dp[x][idx] = 1;
    			r[idx] = max(r[idx], x);
    			l[idx] = min(l[idx], x);
    		}
    		else dp[x][idx] = 0;
    		return;
    	}
    	if (st[x - ve[idx]] != 'X')
    		rec(x - ve[idx] - 1, idx - 1);
    	else dp[x - ve[idx]][idx] = 0;
    	if (x + 1 >= ve[idx] && dp[x - ve[idx]][idx - 1]&& !(cnt[x] - cnt[x - ve[idx]]) && (idx != t - 1 || !(cnt[n - 1] - cnt[x])) ){
    		if (st[x + 1] != 'X') dp[x + 1][idx] = 1;
    		r[idx] = max(r[idx], x);
    		l[idx] = min(l[idx], x);
    		rec(x - 1, idx);
    	}
    	else dp[x][idx] = 0;
    }
     
    string solve_puzzle(string s, vector<int> c) {
    	st = s;
    	ve = c;
    	n = s.size();
    	t = c.size();
    	for (int i = 0;i < t;i++)
    		l[i] = n;
    	now = 0;
    	memset(dp, -1, sizeof dp);
    	for (int i = 0;i < n;i++){
    		cnt[i] = cnt[i - 1] + s[i - 1] == '_';
    		ans += '?';
    	}
    	for (int i = n - 1;i > 0;i--){
    		rec(i, t - 1);
    		if (dp[i][i - 1])
    			break;
    	}
    	for (int i = 0;i <= l[0] - ve[0];i++)
    		ans[i] = '_';
    	for (int i = r[t - 1] + 1; i < n;i++)
    		ans[i] = '_';
    	for (int i = 0;i < t;i++){
    		if (i)
    			for (int j = r[i - 1] + 1;j <= l[i] - ve[i];j++)
    				ans[j] = '_';
    		for (int j = r[i] - ve[i] + 1;j <= l[i];j++)
    			ans[j] = 'X';
    	}
    	return ans;
    }

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