Submission #22835

#	Time	Username	Problem	Language	Result	Execution time	Memory
22835		버거킹 송죽SK점 우수고객 (#40)	Unifying Values (KRIII5_UV)	C++98	0 / 7	79 ms	2252 KiB

UV

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll mod = 1e9+7;

ll n, a[10005], s[10005], ans, dt[10005];

bool valid (ll A, ll B) {
	return (A % B == 0 && A / B >= 1);
}

ll solve (ll idx) {
	if(idx == n) return 1;
	if(!valid(s[n], s[idx])) return 0;
	ll t = s[n]/s[idx];
	if(t == 1 || n-idx+1 <= t) return 0;
	for(ll i=0;i<t;i++) dt[i] = 0;
	dt[1] = 1;
	for(ll i=idx+1;i<n;i++) {
		if(!valid(s[i], s[idx])) continue;
		ll tt = s[i]/s[idx];
		if(tt >= t) continue;
		dt[tt] = (dt[tt] + dt[tt-1]) % mod;
	}
	return dt[t-1];
}

ll solve_zero () {
	if(s[n] != 0) return 0;
	ll ret = 1;
	for(ll i=1;i<n;i++) {
		if(s[i] == 0) ret = (ret * 2) % mod;
	}
	return ret;
}

int main()
{
	scanf("%lld",&n);
	for(ll i=1;i<=n;i++) {
		scanf("%lld",&a[i]);
		s[i] = s[i-1] + a[i];
	}
	for(ll i=1;i<=n;i++) {
		ans = (ans + (s[i] ? solve(i) : 0)) % mod;
	}
	ans = (ans + solve_zero()) % mod;
	printf("%lld\n",(ans+mod-1)%mod);
}

Compilation message (stderr)

UV.cpp: In function 'int main()':
UV.cpp:39:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
                  ^
UV.cpp:41:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&a[i]);
                      ^

• Subtask 1: 0 / 2
• Subtask 2: 0 / 5