#include <functional>
#include <algorithm>
#include <stdexcept>
#include <iostream>
#include <sstream>
#include <fstream>
#include <numeric>
#include <iomanip>
#include <cstdlib>
#include <cstring>
#include <utility>
#include <cctype>
#include <vector>
#include <string>
#include <bitset>
#include <cmath>
#include <queue>
#include <stdint.h>
#include <stdio.h>
#include <stack>
#include <ctime>
#include <list>
#include <map>
#include <set>
#include <tuple>
#include <unordered_set>
#include <assert.h>
#define REP(i,n) for(int i=0;i<n;i++)
#define TR(i,x) for(__typeof(x.begin()) i=x.begin();i!=x.end();i++)
#define ALL(x) x.begin(),x.end()
#define SORT(x) sort(ALL(x))
#define CLEAR(x) memset(x,0,sizeof(x))
#define FILL(x,c) memset(x,c,sizeof(x))
using namespace std;
#define PB push_back
#define MP make_pair
typedef map<int,int> MII;
typedef map<string,int> MSI;
typedef vector<int> VI;
typedef vector<string> VS;
typedef vector<long double> VD;
typedef pair<int,int> PII;
typedef long long int64;
typedef long long LL;
typedef unsigned int UI;
typedef long double LD;
typedef unsigned long long ULL;
const int N = 10007;
const int MOD = 1000000007;
LL a[N], sum[N];
LL dp[N];
int main() {
int n;
cin >> n;
REP(i, n) cin >> a[i];
sum[0] = 0;
for (int i = 0; i < n; ++i) {
sum[i + 1] = sum[i] + a[i];
}
set<LL> candidates;
candidates.insert(sum[n]);
if (sum[n] != 0) {
for (int i = 1; i <= n; ++i) {
if (sum[i] == 0) continue;
if (sum[n] % sum[i] != 0) continue;
LL steps = sum[n] / sum[i];
if (steps <= 0 || steps > n) {
continue;
}
candidates.insert(sum[i]);
}
}
LL answer = 0;
if (sum[n] != sum[0]) {
TR(it, candidates) {
// cout << *it << endl;
if (*it == sum[n]) continue;
LL len = *it;
LL maxStep = sum[n] / len;
REP(i, maxStep + 1) dp[i] = 0;
dp[0] = 1;
for (int i = 1; i <= n; ++i) {
if (sum[i] % len != 0) {
continue;
}
LL step = sum[i] / len;
// cout << "step is " << step << endl;
if (step <= 0 || step > maxStep) {
continue;
}
dp[step] += dp[step - 1];
if (dp[step] >= MOD) {
dp[step] -= MOD;
}
}
// REP(i, maxStep + 1) cout << dp[i] << ", "; cout << endl;
answer = (answer + dp[maxStep]) % MOD;
}
} else {
int zeros = 0;
for (int i = 1; i < n; ++i) {
if (sum[i] == 0) {
++zeros;
}
}
if (zeros > 0) {
answer = 1;
for (int i = 0; i < zeros - 1; ++i) {
answer = answer * 2 % MOD;
}
}
}
cout << answer << endl;
return 0;
}
Compilation message
In file included from /usr/include/c++/5/tuple:35:0,
from UV.cpp:25:
/usr/include/c++/5/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
#error This file requires compiler and library support \
^
