Submission #1076859

#	Time	Username	Problem	Language	Result	Execution time	Memory
1076859		zsombor	Digital Circuit (IOI22_circuit)	C++17	0 / 100	118 ms	156080 KiB

circuit

#include "circuit.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll n, m, MOD = 1000002022;
vector<vector<int> > g(2e5);
vector<vector<ll> > dp(3e3, vector<ll>(3e3, 0));
vector<ll> dp0(3e3, 0);
vector<ll> dp1(3e3, 0);

void init(int N, int M, vector<int> P, vector<int> A) {
    n = N;
    m = M;
    for (int i = 1; i < n + m; i++) g[P[i]].push_back(i);
    for (int i = 0; i < m; i++) (A[i] ? dp1[i + n] = 1 : dp0[i + n] = 1);
}

void solve(int i) {
    for (int k: g[i]) {
        for (int j = n; j >= 1; j--) {
            dp[i][j] = (dp[i][j] * dp0[k] + dp[i][j - 1] * dp1[k]) % MOD;
        }
        dp[i][0]=(dp[i][0]*dp0[k])%MOD;
    }
    ll x0 = dp[i][0], x1 = 0;
    for (int j = 1; j <= n; j++) x1 += dp[i][j];
    for (int j = 1; j <= g[i].size(); j++) {
        dp0[i] += x0;
        dp1[i] += x1;
        x0 += dp[i][j];
        x1 -= dp[i][j];
    }
    dp0[i] %= MOD;
    dp1[i] %= MOD;
}

int count_ways(int L, int R) {
    for (int i = 0; i < n; i++) {
        fill(dp[i].begin(), dp[i].end(), 0);
        dp[i][0] = 1;
        dp0[i] = dp1[i] = 0;
    }
    for (int i = L; i <= R; i++) swap(dp0[i], dp1[i]);
    for (int i = n - 1; i >= 0; i--) solve(i);
    return dp1[0];
}

Compilation message (stderr)

circuit.cpp: In function 'void solve(int)':
circuit.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     for (int j = 1; j <= g[i].size(); j++) {
      |                     ~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 7
• Subtask 3: 0 / 9
• Subtask 4: 0 / 4
• Subtask 5: 0 / 12
• Subtask 6: 0 / 27
• Subtask 7: 0 / 28
• Subtask 8: 0 / 11