Submission #12738

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
12738	2015-01-02 10:09:07	ainu7	Inherited disease (kriii1_I)	C++98	1 / 1	0 ms	1676 KiB

I

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#include <math.h>
#include <stdio.h>
#include <string.h>
#include <vector>
#include <string>
#include <queue>
#include <map>
#include <algorithm>
#include <cmath>
#include <iostream>
#include <sstream>
#include <set>
using namespace std;
int mmod = 1000000007;
int main()
{
  int D;
  cin >> D;
  int prv_start = 0;
  int prv_num = 0;
  int fac = 1;
  for (int i=1; i<=D; i++) {
    int tmp;
    cin >> tmp;
    int nxt_start = (prv_start + fac) % mmod;
    int nxt_num = (tmp - 1 + nxt_start + 1LL * (prv_num - prv_start) * i) % mmod;
    if (nxt_num < 0) nxt_num += mmod;
    fac = (1LL * fac * i) % mmod;
 
 
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