oj.uz

Submission #22666

# Submission time Handle Problem Language Result Execution time Memory
22666 2017-04-30T06:17:44 Z 카시코이(#958, xdoju, ntopia, pps789) Unifying Values (KRIII5_UV) C++14
2 / 7
 500 ms 48756 KB 
#include <cstdio>
#include <cstring>
#include <vector>
#include <unordered_map>
#include <algorithm>
using namespace std;

const int MOD = 1000000007;

int n;
long long arr[10004];
long long sum[10004];
long long allsum;

int main() {
	//freopen("input.txt", "r", stdin);
	scanf("%d", &n);
	for (int i = 1; i <= n; ++i) {
		scanf("%lld", &arr[i]);
		sum[i] = sum[i - 1] + arr[i];
	}
	allsum = sum[n];

	unordered_map<long long, vector<int>> posbysum;
	for (int i = 0; i <= n; ++i) {
		posbysum[sum[i]];
		posbysum[sum[i]].push_back(i);
	}

	long long ans = 0;

	if (allsum == 0) {
		int ppcnt = 0;
		long long ss = 0;
		for (int i = 1; i <= n; ++i) {
			ss += arr[i];
			if (ss == 0) {
				++ppcnt;
			}
		}

		ans = 1;
		for (int k = 1; k < ppcnt; ++k) {
			ans = (ans * 2ll) % MOD;
		}
		ans = (ans - 1 + MOD) % MOD;
		printf("%d\n", ans);

		return 0;
	}

	vector<int> cand;
	for (int i = 2; i <= n; ++i) {
		if (allsum % i == 0) {
			cand.push_back(i);
		}
	}

	posbysum[0] = vector<int>{ 0 };

	vector<vector<int>> sum1(n + 1), prefix(n + 1);
	for (int cnt : cand) {
		long long targetsum = allsum / cnt;

		sum1[0] = vector<int>{ 1 };
		prefix[0] = vector<int>{ 1 };
		for (int k = 1; k <= cnt; ++k) {
			long long ss = targetsum * k;
			vector<int>& curidx = posbysum[ss];
			vector<int>& prvidx = posbysum[targetsum * (k - 1)];
			sum1[k].resize(curidx.size(), 0);
			prefix[k].resize(curidx.size(), 0);

			int p = 0;
			for (int j = 0; j < curidx.size(); ++j) {
				while (p < prvidx.size() && prvidx[p] < curidx[j]) {
					++p;
				}
				sum1[k][j] = (p == 0) ? 0 : prefix[k - 1][p - 1];
				prefix[k][j] = (j == 0 ? 0 : prefix[k][j - 1]) + sum1[k][j];
				prefix[k][j] %= MOD;
			}
		}

		ans += sum1[cnt].back();
	}
	printf("%d\n", ans % MOD);

	return 0;
}

Compilation message

UV.cpp: In function 'int main()':
UV.cpp:47:21: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d\n", ans);
                     ^
UV.cpp:75:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < curidx.size(); ++j) {
                      ^
UV.cpp:76:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while (p < prvidx.size() && prvidx[p] < curidx[j]) {
              ^
UV.cpp:87:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d\n", ans % MOD);
                          ^
UV.cpp:17:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
UV.cpp:19:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &arr[i]);
                         ^

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2096 KB Output is correct
2 Correct 0 ms 2096 KB Output is correct
3 Correct 0 ms 2096 KB Output is correct
4 Correct 6 ms 4068 KB Output is correct
5 Correct 6 ms 4068 KB Output is correct
6 Correct 0 ms 2236 KB Output is correct
7 Correct 3 ms 2968 KB Output is correct
8 Correct 3 ms 2972 KB Output is correct
9 Correct 3 ms 2972 KB Output is correct
10 Correct 0 ms 2700 KB Output is correct
11 Correct 0 ms 2700 KB Output is correct
12 Correct 0 ms 2700 KB Output is correct
13 Correct 0 ms 2968 KB Output is correct
14 Correct 3 ms 2972 KB Output is correct
15 Correct 3 ms 2968 KB Output is correct
16 Correct 3 ms 2832 KB Output is correct
17 Correct 0 ms 2832 KB Output is correct
18 Correct 0 ms 2700 KB Output is correct
19 Correct 0 ms 2228 KB Output is correct
20 Correct 0 ms 2228 KB Output is correct
21 Correct 0 ms 2232 KB Output is correct
22 Correct 0 ms 2236 KB Output is correct
23 Correct 0 ms 2252 KB Output is correct
24 Correct 0 ms 2248 KB Output is correct
25 Correct 0 ms 2252 KB Output is correct
26 Correct 0 ms 2232 KB Output is correct
27 Correct 0 ms 2700 KB Output is correct
28 Correct 0 ms 2700 KB Output is correct
29 Correct 0 ms 2700 KB Output is correct
30 Correct 0 ms 2700 KB Output is correct
31 Correct 0 ms 2832 KB Output is correct
32 Correct 0 ms 2832 KB Output is correct
33 Correct 0 ms 2700 KB Output is correct
34 Correct 0 ms 2700 KB Output is correct
35 Correct 0 ms 2832 KB Output is correct
36 Correct 0 ms 2832 KB Output is correct
37 Correct 0 ms 2832 KB Output is correct
38 Correct 3 ms 2832 KB Output is correct
39 Correct 3 ms 2832 KB Output is correct
40 Correct 0 ms 2832 KB Output is correct
41 Correct 0 ms 2836 KB Output is correct
42 Correct 3 ms 2832 KB Output is correct
43 Correct 3 ms 2832 KB Output is correct
44 Correct 0 ms 2832 KB Output is correct
45 Correct 0 ms 2832 KB Output is correct
46 Correct 0 ms 2832 KB Output is correct
47 Correct 0 ms 2836 KB Output is correct
48 Correct 0 ms 2832 KB Output is correct
49 Correct 0 ms 2832 KB Output is correct
50 Correct 3 ms 2964 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3232 KB Output is correct
2 Correct 3 ms 3576 KB Output is correct
3 Correct 3 ms 3232 KB Output is correct
4 Correct 0 ms 2700 KB Output is correct
5 Correct 3 ms 2964 KB Output is correct
6 Correct 0 ms 2700 KB Output is correct
7 Correct 6 ms 3760 KB Output is correct
8 Correct 3 ms 3364 KB Output is correct
9 Correct 0 ms 2700 KB Output is correct
10 Correct 3 ms 3500 KB Output is correct
11 Correct 3 ms 3408 KB Output is correct
12 Correct 6 ms 4048 KB Output is correct
13 Correct 3 ms 4048 KB Output is correct
14 Correct 6 ms 3916 KB Output is correct
15 Correct 6 ms 3540 KB Output is correct
16 Correct 6 ms 3540 KB Output is correct
17 Correct 16 ms 5744 KB Output is correct
18 Correct 16 ms 5744 KB Output is correct
19 Correct 0 ms 2236 KB Output is correct
20 Correct 3 ms 3068 KB Output is correct
21 Correct 3 ms 3068 KB Output is correct
22 Correct 3 ms 2940 KB Output is correct
23 Correct 0 ms 2624 KB Output is correct
24 Correct 0 ms 2228 KB Output is correct
25 Correct 0 ms 2236 KB Output is correct
26 Correct 0 ms 2236 KB Output is correct
27 Correct 6 ms 3948 KB Output is correct
28 Correct 9 ms 4344 KB Output is correct
29 Correct 6 ms 3228 KB Output is correct
30 Correct 26 ms 7492 KB Output is correct
31 Correct 13 ms 5300 KB Output is correct
32 Correct 6 ms 4200 KB Output is correct
33 Correct 0 ms 3096 KB Output is correct
34 Correct 19 ms 5876 KB Output is correct
35 Correct 26 ms 8228 KB Output is correct
36 Correct 9 ms 4576 KB Output is correct
37 Correct 13 ms 4576 KB Output is correct
38 Correct 23 ms 5876 KB Output is correct
39 Correct 16 ms 5196 KB Output is correct
40 Correct 136 ms 13860 KB Output is correct
41 Correct 159 ms 14256 KB Output is correct
42 Correct 23 ms 7392 KB Output is correct
43 Correct 193 ms 17024 KB Output is correct
44 Correct 206 ms 17012 KB Output is correct
45 Correct 53 ms 9016 KB Output is correct
46 Correct 59 ms 12012 KB Output is correct
47 Correct 139 ms 14784 KB Output is correct
48 Correct 169 ms 16764 KB Output is correct
49 Correct 449 ms 28464 KB Output is correct
50 Correct 243 ms 21096 KB Output is correct
51 Correct 219 ms 21096 KB Output is correct
52 Correct 266 ms 22656 KB Output is correct
53 Correct 66 ms 12012 KB Output is correct
54 Correct 126 ms 13860 KB Output is correct
55 Correct 263 ms 21600 KB Output is correct
56 Correct 229 ms 21600 KB Output is correct
57 Correct 166 ms 15972 KB Output is correct
58 Correct 236 ms 21096 KB Output is correct
59 Correct 253 ms 21096 KB Output is correct
60 Correct 253 ms 21096 KB Output is correct
61 Execution timed out 500 ms 48756 KB Execution timed out
62 Halted 0 ms 0 KB -