Submission #64563

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
64563	2018-08-04T23:24:21 Z	keko37	Snake Escaping (JOI18_snake_escaping)	C++14	58 / 100	2000 ms	17580 KB

snake_escaping

#include<iostream>

using namespace std;

const int MAXN = 21;

int n, q;
char l[MAXN];
int val[1<<MAXN], sum0[1<<MAXN], sum1[1<<MAXN], pc[1<<MAXN];

void precompute () {
	for (int i=0; i<(1<<n); i++) {
		pc[i] = __builtin_popcount(i);
		sum0[i] = val[i];
		sum1[i] = val[i ^ ((1<<n) - 1)];
	}
	for (int i=0; i<n; i++) {
		for (int j=0; j<(1<<n); j++) {
			if (j & (1<<i)) sum0[j] += sum0[j ^ (1<<i)];
			if (j & (1<<i)) sum1[j] += sum1[j ^ (1<<i)];
		}
	}
}

void ispis (int x) {
	for (int i=n-1; i>=0; i--) {
		cout << (bool) (x & (1<<i));
	}
	cout << endl;
}

int main () {
	std::ios::sync_with_stdio(false);
	cin >> n >> q;
	for (int i=0; i<(1<<n); i++) {
		char c;
		cin >> c;
		val[i] = c - '0';
	}
	precompute();
	for (int tc=0; tc<q; tc++) {
		int a = 0, b = 0, c = 0;
		for (int i=0; i<n; i++) {
			cin >> l[i];
			if (l[i] == '?') {
				a ^= (1<<(n-1-i));
			} else if (l[i] == '0') {
				b ^= (1<<(n-1-i));
			} else {
				c ^= (1<<(n-1-i));
			}
		}
		int sol = 0, mask = 0, cnt = 0;
		if (pc[a] <= n/3) {
			do {
				cnt++;
				sol += val[mask | c];
			} while (mask = (mask-a) & a);
		} else if (pc[b] <= n/3) {
			do {
				cnt++;
				if (pc[mask | a] & 1) {
					sol -= sum1[mask | a];
				} else {
					sol += sum1[mask | a];
				}
			} while (mask = (mask-b) & b);
			if (sol < 0) sol = -sol;
		} else {
			do {
				cnt++;
				if (pc[mask | a] & 1) {
					sol -= sum0[mask | a];
				} else {
					sol += sum0[mask | a];
				}
			} while (mask = (mask-c) & c);
			if (sol < 0) sol = -sol;
		}
		cout << sol << "\n";
	}
	return 0;
}

Compilation message

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:58:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    } while (mask = (mask-a) & a);
             ~~~~~^~~~~~~~~~~~~~
snake_escaping.cpp:67:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    } while (mask = (mask-b) & b);
             ~~~~~^~~~~~~~~~~~~~
snake_escaping.cpp:77:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    } while (mask = (mask-c) & c);
             ~~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	376 KB	Output is correct
2	Correct	4 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	520 KB	Output is correct
5	Correct	4 ms	520 KB	Output is correct
6	Correct	5 ms	612 KB	Output is correct
7	Correct	5 ms	612 KB	Output is correct
8	Correct	4 ms	628 KB	Output is correct
9	Correct	4 ms	628 KB	Output is correct
10	Correct	4 ms	628 KB	Output is correct

Subtask #2
0 / 7.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	376 KB	Output is correct
2	Correct	4 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	520 KB	Output is correct
5	Correct	4 ms	520 KB	Output is correct
6	Correct	5 ms	612 KB	Output is correct
7	Correct	5 ms	612 KB	Output is correct
8	Correct	4 ms	628 KB	Output is correct
9	Correct	4 ms	628 KB	Output is correct
10	Correct	4 ms	628 KB	Output is correct
11	Correct	1795 ms	4492 KB	Output is correct
12	Correct	1909 ms	4492 KB	Output is correct
13	Correct	1930 ms	4492 KB	Output is correct
14	Execution timed out	2049 ms	4492 KB	Time limit exceeded
15	Halted	0 ms	0 KB	-

Subtask #3
0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	376 KB	Output is correct
2	Correct	4 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	520 KB	Output is correct
5	Correct	4 ms	520 KB	Output is correct
6	Correct	5 ms	612 KB	Output is correct
7	Correct	5 ms	612 KB	Output is correct
8	Correct	4 ms	628 KB	Output is correct
9	Correct	4 ms	628 KB	Output is correct
10	Correct	4 ms	628 KB	Output is correct
11	Correct	1795 ms	4492 KB	Output is correct
12	Correct	1909 ms	4492 KB	Output is correct
13	Correct	1930 ms	4492 KB	Output is correct
14	Execution timed out	2049 ms	4492 KB	Time limit exceeded
15	Halted	0 ms	0 KB	-

Subtask #4
53.0 / 53.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	376 KB	Output is correct
2	Correct	4 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	520 KB	Output is correct
5	Correct	4 ms	520 KB	Output is correct
6	Correct	5 ms	612 KB	Output is correct
7	Correct	5 ms	612 KB	Output is correct
8	Correct	4 ms	628 KB	Output is correct
9	Correct	4 ms	628 KB	Output is correct
10	Correct	4 ms	628 KB	Output is correct
11	Correct	217 ms	17228 KB	Output is correct
12	Correct	200 ms	17312 KB	Output is correct
13	Correct	243 ms	17312 KB	Output is correct
14	Correct	293 ms	17324 KB	Output is correct
15	Correct	215 ms	17452 KB	Output is correct
16	Correct	226 ms	17452 KB	Output is correct
17	Correct	210 ms	17452 KB	Output is correct
18	Correct	168 ms	17580 KB	Output is correct
19	Correct	198 ms	17580 KB	Output is correct
20	Correct	177 ms	17580 KB	Output is correct
21	Correct	243 ms	17580 KB	Output is correct
22	Correct	229 ms	17580 KB	Output is correct
23	Correct	175 ms	17580 KB	Output is correct
24	Correct	193 ms	17580 KB	Output is correct
25	Correct	212 ms	17580 KB	Output is correct
26	Correct	227 ms	17580 KB	Output is correct
27	Correct	208 ms	17580 KB	Output is correct
28	Correct	181 ms	17580 KB	Output is correct
29	Correct	183 ms	17580 KB	Output is correct
30	Correct	196 ms	17580 KB	Output is correct
31	Correct	183 ms	17580 KB	Output is correct
32	Correct	217 ms	17580 KB	Output is correct
33	Correct	245 ms	17580 KB	Output is correct
34	Correct	159 ms	17580 KB	Output is correct
35	Correct	220 ms	17580 KB	Output is correct
36	Correct	229 ms	17580 KB	Output is correct
37	Correct	230 ms	17580 KB	Output is correct
38	Correct	236 ms	17580 KB	Output is correct
39	Correct	238 ms	17580 KB	Output is correct
40	Correct	246 ms	17580 KB	Output is correct

Subtask #5
0 / 25.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	376 KB	Output is correct
2	Correct	4 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	520 KB	Output is correct
5	Correct	4 ms	520 KB	Output is correct
6	Correct	5 ms	612 KB	Output is correct
7	Correct	5 ms	612 KB	Output is correct
8	Correct	4 ms	628 KB	Output is correct
9	Correct	4 ms	628 KB	Output is correct
10	Correct	4 ms	628 KB	Output is correct
11	Correct	1795 ms	4492 KB	Output is correct
12	Correct	1909 ms	4492 KB	Output is correct
13	Correct	1930 ms	4492 KB	Output is correct
14	Execution timed out	2049 ms	4492 KB	Time limit exceeded
15	Halted	0 ms	0 KB	-

Submission #64563

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 0 / 7.0

Subtask #3 0 / 10.0

Subtask #4 53.0 / 53.0

Subtask #5 0 / 25.0

Subtask #1
5.0 / 5.0

Subtask #2
0 / 7.0

Subtask #3
0 / 10.0

Subtask #4
53.0 / 53.0

Subtask #5
0 / 25.0