Submission #945951

#	Time	Username	Problem	Language	Result	Execution time	Memory
945951		mansur	Game (IOI13_game)	C++17	10 / 100	13106 ms	219056 KiB

game

#include "game.h"
#include<bits/stdc++.h>
 
using namespace std;
 
#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()                 
#define sz(a) (int)a.size()
#define s second
#define f first
 
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
 
const int N = 2e3 + 5;
 
int n, m, lg[N], pw[7];
ll vl[N][N], up[N][N][7];
 
long long gcd2(long long X, long long Y) {
    long long tmp;
    while (X != Y && Y != 0) {
        tmp = X;
        X = Y;
        Y = tmp % Y;
    }
    return X;
}
 
ll get(int R, int l, int r) {
	int k = lg[r - l + 1], p = l;
	ll res = 0;
	while (true) {
		res = gcd2(res, up[R][p][k]);
		p += pw[k];
		if (p > r) break;
		p = min(p, r - pw[k] + 1);
	}
	return res;
}
 
void bld(int R) {
	for (int k = 0; k < 7; k++) {
		for (int i = 0; i < m - pw[k] + 1; i++) {
			if (k) {
				int v = pw[k - 1];
				up[R][i][k] = gcd2(up[R][i][k - 1], up[R][i + v][k - 1]);
				up[R][i][k] = gcd2(up[R][i][k], up[R][i + 2 * v][k - 1]);
			}else up[R][i][k] = vl[R][i]; 
		} 
	}
}
 
void init(int R, int C) {
    n = R, m = C;
    lg[0] = -1;
    pw[0] = 1;
    for (int i = 1; i < 7; i++) pw[i] = pw[i - 1] * 3;
    for (int i = 1; i <= m; i++) {
    	lg[i] = lg[i / 3] + 1;
	}
	cout << '\n';
}
 
void update(int P, int Q, ll K) {
	vl[P][Q] = K;
	bld(P);    
}
 
ll calculate(int P, int Q, int U, int V) {
	ll ans = 0;
	for (int i = P; i <= U; i++) {
		ans = gcd2(ans, get(i, Q, V));
	}
	return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 26
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20