Submission #1077302


Source Code Expand

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define all(c) c.begin(),c.end()
#define pb push_back
#define fs first
#define sc second
#define show(x) cout << #x << " = " << x << endl
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
using namespace std;
template<class S,class T> ostream& operator<<(ostream& o,const pair<S,T> &p){return o<<"("<<p.fs<<","<<p.sc<<")";}
template<class T> ostream& operator<<(ostream& o,const vector<T> &vc){o<<"sz = "<<vc.size()<<endl<<"[";for(const T& v:vc) o<<v<<",";o<<"]";return o;}
typedef long long ll;
ll mod = 1e9+7;
ll dp[2001][2001];
void add(ll &x,ll y){
	x+=y;
	x%=mod;
}
int N,M,K;
int main(){
	cin>>N>>M>>K;
	int D=(N+M-1)/(K-1);
	dp[0][0]=1;
	ll ans=0;
	rep(d,D){
		rep(a,N+1){
			int b=(K-1)*d-a;
			if(!(0<=b&&b<=M)) continue;
			rep(k,K){			//K-1 (continue)
				int na=a+k,nb=b+(K-1-k);
				if(na>N||nb>M) continue;
				add(dp[na][nb],dp[a][b]);
			}
			rep1(k,K-1){			//K (end)
				int na=a+k,nb=b+(K-k);
				if(na<=N&&nb<=M&&(N-na)%(K-1)==0&&(M-nb)%(K-1)==0) add(ans,dp[a][b]);
			}
		}
	}
	cout<<ans<<endl;
}

Submission Info

Submission Time
Task E - Eternal Average
User sigma425
Language C++14 (GCC 5.4.1)
Score 1600
Code Size 1187 Byte
Status AC
Exec Time 266 ms
Memory 31488 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 1600 / 1600
Status
AC × 3
AC × 27
Set Name Test Cases
Sample s1.txt, s2.txt, s3.txt
All 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, s1.txt, s2.txt, s3.txt
Case Name Status Exec Time Memory
01.txt AC 3 ms 256 KB
02.txt AC 266 ms 31488 KB
03.txt AC 3 ms 256 KB
04.txt AC 3 ms 256 KB
05.txt AC 190 ms 31488 KB
06.txt AC 3 ms 256 KB
07.txt AC 12 ms 4224 KB
08.txt AC 5 ms 1024 KB
09.txt AC 128 ms 31488 KB
10.txt AC 125 ms 31488 KB
11.txt AC 55 ms 10880 KB
12.txt AC 25 ms 8192 KB
13.txt AC 108 ms 27904 KB
14.txt AC 66 ms 18816 KB
15.txt AC 100 ms 25728 KB
16.txt AC 3 ms 256 KB
17.txt AC 77 ms 20352 KB
18.txt AC 30 ms 7296 KB
19.txt AC 34 ms 9856 KB
20.txt AC 124 ms 29824 KB
21.txt AC 3 ms 256 KB
22.txt AC 140 ms 31488 KB
23.txt AC 104 ms 28032 KB
24.txt AC 98 ms 26368 KB
s1.txt AC 3 ms 256 KB
s2.txt AC 3 ms 256 KB
s3.txt AC 4 ms 1024 KB