Submission #1021766

#	Time	Username	Problem	Language	Result	Execution time	Memory
1021766		vjudge1	Paint By Numbers (IOI16_paint)	C++17	7 / 100	0 ms	348 KiB

paint

#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e5 + 100;

int n, k;
int pref[maxn];

int sum(int l, int r){
	if(l > r) return 0;
	return pref[r] - pref[l-1];
}

string solve_puzzle(std::string s, std::vector<int> c){
	n = s.size();
	s = "#" + s; k = c.size();
	reverse(c.begin(), c.end());
	c.push_back(0);
	reverse(c.begin(), c.end());
	for(int i = 1; i <= k; i++){
		pref[i] += pref[i-1] + c[i];
	}
	string res;
	vector<int> ans = {'.', 'Y', 'X', '?'};
	for(int i = 1; i <= n; i++){
		int x = 0;
		for(int j = 1; j <= k; j++){
			int l = sum(1, j - 1) + j;
			int r = n - sum(j + 1, k) - k + j;
			if(l <= i && i <= r && r - l + 1 >= c[j]) x |= 2;
		}
		for(int j = 0; j <= k; j++){
			int l = sum(1, j) + max(j, 1);
			int r = 1 + n - sum(j + 1, k) - max(1, k - j);
			if(l <= i && i <= r) x |= 1;
		}
		res.push_back(ans[x]);
	}
	return res;
}

• Subtask 1: 7 / 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