Submission #9774

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
9774	2014-09-28 08:52:50	kkjjkk	Uniting (kriii2_U)	C++98	0 / 4	0 ms	4792 KiB

U

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#include <algorithm>
#include <iostream>
#include <cstdio>
using namespace std;
long long h[100005];
long long f[100005], m = 1000000007, nn[100005], tw[100005];
int main()
{
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    int n;
    scanf("%d", &n);
    for(int i = 0; i < n; i++) scanf("%lld", &h[i]);
    f[1] = 1;
    for(int i = 2; i < 100005; i++) { f[i] = f[i - 1] * i; f[i] %= m; }
    tw[1] = 2;
    for(int i = 2; i < 100005; i++) { tw[i] = tw[i - 1] * 2; tw[i] %= m; }
    if(n == 1) { printf("0\n"); printf("1"); }
    else if(n == 2) { printf("%lld\n", h[0] * h[1]); printf("2"); }
    else {
         //sort(h, h + n);
         
         long long a = h[0] + h[1];
         long long b = h[0] * h[1];
         long long c, d;//, m = 1000000007;
         for(int i = 2; i < n; i++) {
              /*c = a + h[i];
              d = ((a % m) * h[i]) % m; //d %= ;
              a = c;
 
 
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• Subtask 1: 0 / 4