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Submission #344215

# Submission time Handle Problem Language Result Execution time Memory
344215 2021-01-05T09:29:40 Z Nurlykhan Intergalactic ship (IZhO19_xorsum) C++17
0 / 100
 182 ms 1568 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = (int)1e5 + 10;
const int M = 256;
const int mod = (int)1e9 + 7;

int n, q;
int a[N], b[N];
int l[N], r[N], x[N];
int t[N];

int dp[M + M], old_dp[M + M];

int get_sum(int id) {
    memset(old_dp, 0, sizeof(old_dp));

    old_dp[a[id]] = 1;
    for (int i = 0; i < q; i++) {
        if (l[i] <= id && id <= r[i]) {
            memset(dp, 0, sizeof(dp));
            for (int j = 0; j < M; j++) {
                (dp[j ^ x[i]] += old_dp[j]) %= mod;
            }
            for (int j = 0; j < M; j++) {
                (old_dp[j] += dp[j]) %= mod;
            }
        }
    }

    int ans = 0;
    for (int i = 0; i < M; i++) {
        (ans += i * 1ll * old_dp[i] % mod) %= mod;
    }
    return ans;
}

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++)
        scanf("%d", &a[i]);
    scanf("%d", &q);
    for (int i = 0; i < q; i++)
        scanf("%d%d%d", &l[i], &r[i], &x[i]);

    int ans = 0;
    for (int i = 1; i <= n; i++) {
        t[i] = get_sum(i);
        //cout << i << ' ' << get_sum(i) << endl;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            //cout << i << ' ' << j << ' ' << get_sum(i) * 1ll * get_sum(j) * min(i, j) * min(n - i + 1, n - j + 1)
            (ans += t[i] * 1ll * t[j] * min(i, j) * min(n - i + 1, n - j + 1) % mod) %= mod;
        }
    }

    cout << ans;
    return 0;
}

Compilation message

xorsum.cpp: In function 'int main()':
xorsum.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   40 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
xorsum.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~
xorsum.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   43 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
xorsum.cpp:45:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |         scanf("%d%d%d", &l[i], &r[i], &x[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 182 ms 1568 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -