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Submission #857199

# Submission time Handle Problem Language Result Execution time Memory
857199 2023-10-05T14:46:32 Z lolismek Brperm (RMI20_brperm) C++14
50 / 100
 106 ms 168836 KB 
#include "brperm.h"

#include <iostream>

using namespace std;

const int NMAX = 5e5;
const int LOGMAX = 19;

const int B = 29;
const int MOD = 1e9 + 7;

int dp[NMAX + 1][LOGMAX + 1][2];
int powB[NMAX + 1];

int h[NMAX + 1];

void init(int n, const char s[]){
    powB[0] = 1;
    for(int i = 1; i <= NMAX; i++){
        powB[i] = (1ll * powB[i - 1] * B) % MOD;
    }
    for(int i = 1; i <= n; i++){
        h[i] = ((1ll * h[i - 1] * B) % MOD + (s[i - 1] - 'a' + 1)) % MOD;
    }
    int pw = 1, pwind = 0;
    while(pw * 2 <= n){
        pw *= 2;
        pwind++;
    }
    for(int k = pwind; k >= 0; k--){
        for(int j = 0; (1 << j) <= n; j++){
            for(int i = 1; i <= n; i++){
                if(j == 0){
                    dp[i][j][k & 1] = (s[i - 1] - 'a' + 1);
                }else{
                    if(i + ((1 << j) - 1) * (1 << k) <= n){
                        dp[i][j][k & 1] = ((1ll * dp[i][j - 1][(k + 1) & 1] * powB[(1 << (j - 1))]) % MOD + dp[i + (1 << k)][j - 1][(k + 1) & 1]) % MOD;
                    }
                }
            }
        }
    }
    return;
}

int query(int i, int k){
    ++i;
    int H1 = dp[i][k][0];
    int H2 = (1ll * h[i + (1 << k) - 1] + MOD - ((1l * h[i - 1] * powB[(1 << k)]) % MOD)) % MOD;
    return (H1 == H2);
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6488 KB Output is correct
2 Correct 4 ms 6492 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6488 KB Output is correct
2 Correct 4 ms 6492 KB Output is correct
3 Correct 92 ms 23312 KB Output is correct
4 Correct 106 ms 23636 KB Output is correct
5 Correct 90 ms 23380 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Runtime error 88 ms 168836 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6488 KB Output is correct
2 Correct 4 ms 6492 KB Output is correct
3 Correct 92 ms 23312 KB Output is correct
4 Correct 106 ms 23636 KB Output is correct
5 Correct 90 ms 23380 KB Output is correct
6 Runtime error 88 ms 168836 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -