oj.uz

Submission #56582

# Submission time Handle Problem Language Result Execution time Memory
56582 2018-07-11T21:18:51 Z Xellos Snake Escaping (JOI18_snake_escaping) C++14
12 / 100
 1762 ms 66560 KB 
#include <bits/stdc++.h>
// iostream is too mainstream
#include <cstdio>
// bitch please
#include <iostream>
#include <algorithm>
#include <cstdlib>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <list>
#include <cmath>
#include <iomanip>
#include <time.h>
#define dibs reserve
#define OVER9000 1234567890123456789LL
#define ALL_THE(CAKE,LIE) for(auto LIE =CAKE.begin(); LIE != CAKE.end(); LIE++)
#define tisic 47
#define soclose 1e-8
#define chocolate win
// so much chocolate
#define patkan 9
#define ff first
#define ss second
#define abs(x) ((x < 0)?-(x):x)
#define uint unsigned int
#define dbl long double
#define pi 3.14159265358979323846
using namespace std;
// mylittledoge

typedef long long cat;

#ifdef DONLINE_JUDGE
	// palindromic tree is better than splay tree!
	#define lld I64d
#endif

int cost_arr[2][1<<19];

void solve(int d, int B, vector<int> & cost, int cl, int cr, vector<cat> & query, int ql, int qr, vector<int> & ans) {
	if(ql == qr) return;
	if(d == B) {
		for(int i = ql; i < qr; i++)
			ans[query[i]&((1LL<<20)-1)] += ((query[i]>>60) ? -cost[cl] : cost[cl]);
		return;
	}
	int cnt[3] = {};
	for(int i = ql; i < qr; i++) {
		if((query[i]>>(40+d))&1) cnt[(query[i]>>(20+d))&1]++;
		else cnt[2]++;
	}
	if(cnt[2] <= cnt[0] && cnt[2] <= cnt[1]) {
		for(int i = 0; i < (1<<(B-1-d)); i++) {
			cost_arr[0][i] = cost[cl+2*i];
			cost_arr[1][i] = cost[cl+2*i+1];
		}
		for(int i = 0; i < (1<<(B-1-d)); i++) cost[cl+i] = cost_arr[0][i];
		for(int i = 0; i < (1<<(B-1-d)); i++) cost[cl+(1<<(B-1-d))+i] = cost_arr[1][i];
		int a = ql, b = qr;
		for(int i = ql; i < b; i++) {
			if((query[i]>>(40+d))&1) {
				if((query[i]>>(20+d))&1) {
					while(b > i+1 && ((query[b-1]>>(40+d))&1) == 1 && ((query[b-1]>>(20+d))&1) == 1) b--;
					if(i+1 == b) break;
					swap(query[i], query[b-1]);
					b--;
					i--;
				}
				else {
					while(a < i && ((query[a]>>(40+d))&1) == 1 && ((query[a]>>(20+d))&1) == 0) a++;
					if(a == i) continue;
					swap(query[i], query[a]);
					a++;
					i--;
				}
			}
		}
		solve(d+1, B, cost, cl, cl+(1<<(B-1-d)), query, ql, ql+cnt[0]+cnt[2], ans);
		a = qr-cnt[1];
		for(int i = ql; i < a; i++) if(((query[i]>>(40+d))&1) == 0) {
			while(a > i+1 && ((query[a-1]>>(40+d))&1) == 0) a--;
			if(i+1 == a) break;
			swap(query[i], query[a-1]);
			a--;
			i--;
		}
		solve(d+1, B, cost, cl+(1<<(B-1-d)), cr, query, qr-cnt[2]-cnt[1], qr, ans);
		return;
	}
	int x = (int) (cnt[1] < cnt[0]);
	for(int i = 0; i < (1<<(B-1-d)); i++) {
		cost_arr[0][i] = cost[cl+2*i+1-x];
		cost_arr[1][i] = cost[cl+2*i] + cost[cl+2*i+1];
	}
	for(int i = 0; i < (1<<(B-1-d)); i++) cost[cl+i] = cost_arr[0][i];
	for(int i = 0; i < (1<<(B-1-d)); i++) cost[cl+(1<<(B-1-d))+i] = cost_arr[1][i];
	int a = ql, b = qr;
	for(int i = ql; i < b; i++) {
		if((query[i]>>(40+d))&1) {
			if(((query[i]>>(20+d))&1) != x) {
				while(a < i && ((query[a]>>(40+d))&1) == 1 && ((query[a]>>(20+d))&1) != x) a++;
				if(a == i) continue;
				swap(query[i], query[a]);
				a++;
				i--;
			}
		}
		else {
			while(b > i+1 && ((query[b-1]>>(40+d))&1) == 0) b--;
			if(i+1 == b) break;
			swap(query[i], query[b-1]);
			b--;
			i--;
		}
	}
	for(int i = ql+cnt[1-x]; i < ql+cnt[1-x]+cnt[x]; i++) query[i] ^= 1LL<<60;
	solve(d+1, B, cost, cl, cl+(1<<(B-1-d)), query, ql, ql+cnt[1-x]+cnt[x], ans);
	a = qr-cnt[2];
	for(int i = ql; i < a; i++) if(((query[i]>>(40+d))&1) == 1 && ((query[i]>>(20+d))&1) == x) {
		while(a > i+1 && ((query[a-1]>>(40+d))&1) == 1 && ((query[a-1]>>(20+d))&1) == x) a--;
		if(i+1 == a) break;
		swap(query[i], query[a-1]);
		a--;
		i--;
	}
	for(int i = ql+cnt[1-x]; i < ql+cnt[1-x]+cnt[x]; i++) query[i] ^= 1LL<<60;
	solve(d+1, B, cost, cl+(1<<(B-1-d)), cr, query, qr-cnt[2]-cnt[x], qr, ans);
}

int main() {
	cin.sync_with_stdio(0);
	cin.tie(0);
	cout << fixed << setprecision(10);
	int B, Q;
	char buf[(1<<20) + 10];
	scanf("%d %d %s", &B, &Q, buf);
	vector<int> cost(1<<B);
	for(int i = 0; i < (1<<B); i++) {
		int b = 0;
		for(int j = 0; j < B; j++) b = 2*b + ((i>>j)&1);
		cost[b] = buf[i]-'0';
	}
	vector<cat> query(Q); // mask, bits, id
	char buf_small[30];
	for(int i = 0; i < Q; i++) {
		scanf("%s", buf_small);
		query[i] = i;
		for(int j = 0; j < B; j++) {
			if(buf_small[j] == '?') continue;
			query[i] += 1LL<<(j+40);
			if(buf_small[j] == '1') query[i] += 1LL<<(j+20);
		}
	}
	vector<int> ans(Q, 0);
	solve(0, B, cost, 0, 1<<B, query, 0, Q, ans);
	for(int i = 0; i < Q; i++) cout << ans[i] << "\n";
	return 0;}

// look at my code
// my code is amazing

Compilation message

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:139:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %s", &B, &Q, buf);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:149:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", buf_small);
   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 3 ms 556 KB Output is correct
4 Correct 3 ms 556 KB Output is correct
5 Correct 3 ms 556 KB Output is correct
6 Correct 3 ms 556 KB Output is correct
7 Correct 3 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 628 KB Output is correct
10 Correct 4 ms 652 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 3 ms 556 KB Output is correct
4 Correct 3 ms 556 KB Output is correct
5 Correct 3 ms 556 KB Output is correct
6 Correct 3 ms 556 KB Output is correct
7 Correct 3 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 628 KB Output is correct
10 Correct 4 ms 652 KB Output is correct
11 Correct 394 ms 16288 KB Output is correct
12 Correct 475 ms 16288 KB Output is correct
13 Correct 798 ms 16288 KB Output is correct
14 Correct 878 ms 16288 KB Output is correct
15 Correct 664 ms 16596 KB Output is correct
16 Correct 1046 ms 16596 KB Output is correct
17 Correct 1363 ms 16596 KB Output is correct
18 Correct 254 ms 17324 KB Output is correct
19 Correct 451 ms 17324 KB Output is correct
20 Correct 488 ms 26796 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 3 ms 556 KB Output is correct
4 Correct 3 ms 556 KB Output is correct
5 Correct 3 ms 556 KB Output is correct
6 Correct 3 ms 556 KB Output is correct
7 Correct 3 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 628 KB Output is correct
10 Correct 4 ms 652 KB Output is correct
11 Correct 394 ms 16288 KB Output is correct
12 Correct 475 ms 16288 KB Output is correct
13 Correct 798 ms 16288 KB Output is correct
14 Correct 878 ms 16288 KB Output is correct
15 Correct 664 ms 16596 KB Output is correct
16 Correct 1046 ms 16596 KB Output is correct
17 Correct 1363 ms 16596 KB Output is correct
18 Correct 254 ms 17324 KB Output is correct
19 Correct 451 ms 17324 KB Output is correct
20 Correct 488 ms 26796 KB Output is correct
21 Correct 522 ms 40884 KB Output is correct
22 Correct 562 ms 54792 KB Output is correct
23 Runtime error 1762 ms 66560 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
24 Halted 0 ms 0 KB -

Subtask #4
0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 3 ms 556 KB Output is correct
4 Correct 3 ms 556 KB Output is correct
5 Correct 3 ms 556 KB Output is correct
6 Correct 3 ms 556 KB Output is correct
7 Correct 3 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 628 KB Output is correct
10 Correct 4 ms 652 KB Output is correct
11 Runtime error 100 ms 66560 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
12 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 3 ms 556 KB Output is correct
4 Correct 3 ms 556 KB Output is correct
5 Correct 3 ms 556 KB Output is correct
6 Correct 3 ms 556 KB Output is correct
7 Correct 3 ms 584 KB Output is correct
8 Correct 2 ms 584 KB Output is correct
9 Correct 2 ms 628 KB Output is correct
10 Correct 4 ms 652 KB Output is correct
11 Correct 394 ms 16288 KB Output is correct
12 Correct 475 ms 16288 KB Output is correct
13 Correct 798 ms 16288 KB Output is correct
14 Correct 878 ms 16288 KB Output is correct
15 Correct 664 ms 16596 KB Output is correct
16 Correct 1046 ms 16596 KB Output is correct
17 Correct 1363 ms 16596 KB Output is correct
18 Correct 254 ms 17324 KB Output is correct
19 Correct 451 ms 17324 KB Output is correct
20 Correct 488 ms 26796 KB Output is correct
21 Correct 522 ms 40884 KB Output is correct
22 Correct 562 ms 54792 KB Output is correct
23 Runtime error 1762 ms 66560 KB Memory limit exceeded: We have a known bug that the memory usage is measured incorrectly (possibly because of Meltdown/Spectre patch), so your solution may be correct. Please submit again. Sorry for the inconvenience.
24 Halted 0 ms 0 KB -