Submission #27856

#	Time	Username	Problem	Language	Result	Execution time	Memory
27856		szawinis	Relativnost (COCI15_relativnost)	C++14	140 / 140	3703 ms	19988 KiB

relativnost

#include <bits/stdc++.h>
using namespace std;
const int MAX = (1e5)+5, MOD = (1e4)+7;

int n, c, q, a[MAX], b[MAX], t[2*MAX][22];
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() {
	scanf("%d%d",&n,&c);
	for(int i = 0; i < n; ++i) scanf("%d",&t[n+i][1]), t[n+i][1] %= MOD;
	for(int i = 0; i < n; ++i) scanf("%d",&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;
		}
	}
	scanf("%d",&q);
	for(int i, na, nb; q--; ) {
		scanf("%d%d%d",&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);
		printf("%d\n", t[1][c]);
	}
}

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) {
                ^
relativnost.cpp: In function 'int main()':
relativnost.cpp:15:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&c);
                     ^
relativnost.cpp:16:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i < n; ++i) scanf("%d",&t[n+i][1]), t[n+i][1] %= MOD;
                                                                     ^
relativnost.cpp:17:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 0; i < n; ++i) scanf("%d",&t[n+i][0]), t[n+i][0] %= MOD;
                                                                     ^
relativnost.cpp:24:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&q);
                ^
relativnost.cpp:26:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&i,&na,&nb); --i;
                             ^

• Subtask 1: 140 / 140