Submission #27853

#	Time	Username	Problem	Language	Result	Execution time	Memory
27853		szawinis	Relativnost (COCI15_relativnost)	C++14	126 / 140	2643 ms	19368 KiB

relativnost

#include <bits/stdc++.h>
using namespace std;
const int MAX = (1e5)+1, MOD = (1e4)+7;

int n, c, q, a[MAX], b[MAX], t[2*MAX][21];
void update(int x) {
	for(int i = (n+x >> 1); i >= 1; i >>= 1) {
		for(int j = 0; j <= c; j++) t[i][j] = 0;
		for(int j = 0; j <= c; j++) for(int k = 0; k <= c; k++) {
			t[i][min(j+k, c)] = (t[i][min(j+k, c)] + t[i<<1][j]*t[i<<1|1][k])%MOD;
		}
	}
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> c;
	for(int i = 0; i < n; i++) cin >> t[n+i][1], t[n+i][1] %= MOD;
	for(int i = 0; i < n; i++) cin >> t[n+i][0], t[n+i][0] %= MOD;
	for(int i = n-1; i >= 1; i--) {
		for(int j = 0; j <= c; j++) t[i][j] = 0;
		for(int j = 0; j <= c; j++) for(int k = 0; k <= c; k++) {
			t[i][min(j+k, c)] = (t[i][min(j+k, c)] + t[i<<1][j]*t[i<<1|1][k])%MOD;
		}
	}
	cin >> q;
	for(int i, na, nb; q > 0; q--) {
		cin >> i >> na >> nb; --i;
		memset(t[n+i], 0, sizeof(t[n+i]));
		t[n+i][1] = na%MOD, t[n+i][0] = nb%MOD;
		update(i);
		cout << t[1][c] << endl;
	}
}

Compilation message (stderr)

relativnost.cpp: In function 'void update(int)':
relativnost.cpp:7:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  for(int i = (n+x >> 1); i >= 1; i >>= 1) {
                ^

• Subtask 1: 126 / 140