Submission #737643

#	Time	Username	Problem	Language	Result	Execution time	Memory
737643		minhcool	Digital Circuit (IOI22_circuit)	C++17	18 / 100	3016 ms	257236 KiB

circuit

#include "circuit.h"
#include<bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
#define mp make_pair
 
typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;
 
const int N = 1e4 + 5;
 
const int oo = 1e18 + 7, mod = 1000002022;
 
int n, m;
vector<int> Adj[N];
 
int arr[N];
 
long long coor[N][N];
long long pref[N], suff[N];
 
void dfs(int u){
	if(!Adj[u].size()) return;
	for(auto v : Adj[u]) dfs(v);
	pref[0] = coor[Adj[u][0]][m];
	for(int i = 1; i < Adj[u].size(); i++) pref[i] = (pref[i - 1] * coor[Adj[u][i]][m]) % mod;
	suff[Adj[u].size()] = 1;
	for(int i = Adj[u].size() - 1; i >= 0; i--) suff[i] = (suff[i + 1] * coor[Adj[u][i]][m]) % mod;
	//for(int i = 0; i < Adj[u].size(); i++) cout << pref[i] << " " << suff[i] << "\n";
	coor[u][m] = (pref[Adj[u].size() - 1] * Adj[u].size()) % mod;
	for(int i = 0; i < Adj[u].size(); i++){
        int v = Adj[u][i];
        long long temp1 = (!i ? 1 : pref[i - 1]);
        temp1 = (temp1 * suff[i + 1]) % mod;
        if(!temp1) continue;
		for(int j = 0; j < m; j++){
            if(!coor[v][j]) continue;
			long long temp2 = (temp1 * coor[v][j]) % mod;
			coor[u][j] += temp2;
		}
	}
	for(int i = 0; i <= m; i++) coor[u][i] = ((coor[u][i] % mod) + mod) % mod;
	//for(int i = 0; i <= m; i++) cout << u << " " << i << " " << coor[u][i] << "\n";
}
 
void init(int N, int M, vector<int> P, vector<int> A){
	n = N, m = M;
	for(int i = 1; i < n + m; i++) Adj[P[i]].pb(i);
	for(int i = 0; i < m; i++) arr[i] = A[i];
	for(int i = n; i < n + m; i++) coor[i][i - n] = coor[i][m] = 1;
	dfs(0);
	//for(int i = 0; i < m; i++) cout << coor[0][i] << " ";
	//cout << "\n";
}
 
int count_ways(int L, int R){
	L -= n, R -= n;
	for(int i = L; i <= R; i++) arr[i] ^= 1;
	long long ans = 0;
	for(int i = 0; i < m; i++) if(arr[i]) ans += coor[0][i];
    ans %= mod;
	int ans2 = ans;
	return ans2;
}

Compilation message (stderr)

circuit.cpp:16:21: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   16 | const int oo = 1e18 + 7, mod = 1000002022;
      |                ~~~~~^~~
circuit.cpp: In function 'void dfs(int)':
circuit.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |  for(int i = 1; i < Adj[u].size(); i++) pref[i] = (pref[i - 1] * coor[Adj[u][i]][m]) % mod;
      |                 ~~^~~~~~~~~~~~~~~
circuit.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |  for(int i = 0; i < Adj[u].size(); i++){
      |                 ~~^~~~~~~~~~~~~~~

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