Submission #98698

#	Time	Username	Problem	Language	Result	Execution time	Memory
98698		Dat160601	Relativnost (COCI15_relativnost)	C++17	0 / 140	4050 ms	22520 KiB

relativnost

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define fi first
#define se second

const int N = 1e5 + 7, mod = 10007;

struct node{
	int ret[21];
} it[4 * N];

int n, c, q, a, b, x;

void add(int &a, int b){
	b %= mod;
	a += b;
	if(a >= mod) a -= mod;
}

node merge(node a, node b){
	node res;
	for(int i = 0; i <= c; i++) res.ret[i] = 0;
	for(int i = 0; i <= c; i++){
		for(int j = 0; j <= c; j++){
			add(res.ret[min(c, i + j)], a.ret[i] * b.ret[j]);
		}
	}
	return res;
}

void update(int k, int l, int r, int pos, int a, int b){
	if(l > pos || r < pos) return;
	if(l == r){
		it[k].ret[0] = b;
		it[k].ret[1] = a;
		return;
	}
	int mid = (l + r) >> 1;
	update(k << 1, l, mid, pos, a, b);
	update(k << 1 | 1, mid + 1, r, pos, a, b);
	it[k] = merge(it[k << 1], it[k << 1 | 1]);
}

int main(){
	scanf("%d %d", &n, &c);
	for(int i = 1; i <= n; i++){
		scanf("%d %d", &a, &b);
		a %= mod, b %= mod;
		update(1, 1, n, i, a, b);
	}
	cin >> q;
	while(q --){
		scanf("%d %d %d", &x, &a, &b);
		a %= mod, b %= mod;
		update(1, 1, n, x, a, b);
		cout << it[1].ret[c] << "\n";
	}
}

Compilation message (stderr)

relativnost.cpp: In function 'int main()':
relativnost.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &c);
  ~~~~~^~~~~~~~~~~~~~~~~
relativnost.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~~
relativnost.cpp:55:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d", &x, &a, &b);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 140