1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
// Author: Piotr Grzegorczyk (ud2@interia.eu)
// Task: PA2018/FUT

#include <bits/stdc++.h>
using namespace std;

#include "message.h"
#include "futbol.h"

// NOTE: rozwiazanie czesciowe dla P<10000 i N>0

vector<int> vb;

long get(int n, int k) {
	int i = n*(n+1)/2 + k;
	return vb[i];
}

void gen(int p) {
	
	vb.resize( 1ll*p*(p+1)/2 );
	
	int ip = 0;
	int i = 1;
	vb[0] = 1;
	for (int n=1; n<p; n++) {		
		vb[i] = 1;
		vb[i+n] = 1;
		
		for (int k=1; k<n; k++)
			vb[i+k] = (vb[ip+k-1] + vb[ip+k]) % p;
			
		ip = i;
		i += (n+1);
	}
}

int bmod(int n, int k, int p) {
	
	int r = 1;	
	while (n >= p) {
		int h = p;
		while (1ll*h*p <= n)
			h *= p;
		
		r = 1ll*r*get(n/h, k/h) % p;
			
		n = n % h;
		k = k % h;
		if (k > n)
			return 0;
	}
	
	return 1ll*r*get(n, k) % p;
}

int main() {
	
//	freopen("test02.in", "rb", stdin);
	
	std::ios_base::sync_with_stdio(false);
	 
	int N = GetN();
	int P = GetP();
	int K = GetK();

	int ID = MyNodeId();
	int NODES = NumberOfNodes();

	if (K==0) {
		if (ID == 0) 
			cout << 1 << endl;
		return 0;
	}

	if (ID == 0 && NODES > 1) {
		PutInt(1, N);
		Send(1);
	}
			
	if (N == 0) {		
		// NOTE: licza tylko dwie instancje
		if (ID == 1) {
			Receive(0);
			N = GetInt(0);
			NODES = 2;
		} else { // ID > 1
			PutInt(0, -1);
			Send(0);
			return 0;
		}
	}

	int k_min = 1ll*ID*(K+1)/NODES;
	int k_max = 1ll*(ID+1)*(K+1)/NODES-1;

	long long size = 1ll*P*(P+1)/2*sizeof(int);
		
	if (size < 200000000) {
	
		int R = 0;
		
		gen(P);

		for (int k=k_min; k<=k_max; k++)
			R = (R + bmod(N, k, P)) % P;

		if (ID != 0) {
			PutInt(0, R);
			Send(0);
		} else {
			bool N0 = false;
			
			for (int i=1; i<NODES; i++) {
				Receive(i);
				int ri = GetInt(i);
				if (ri < 0) {
					N0 = true;
				} else {			
					R = (R + ri) % P;
				}
			}
			
			if (N0) {
				// przelicz za pozostale instancje
				for (int k=k_max+1; k<(K+1)/2; k++)
					R = (R + bmod(N, k, P)) % P;
			}
			
			cout << R << endl;
		}
	
	} else {
		
		int R = 0;
		
		int n = 0;
		vector<int> v(K+1, 1);
		vector<int> v2(K+1);		
				
		while (n < N) {
			n++;
			v2[0] = 1;			
			if (n <= K)
				v2[n] = 1;
						
			for (int k=1; k<n && k<=K; k++)
				v2[k] = (v[k-1] + v[k]) % P;
				
			v.swap(v2);
		}

		for (int k=k_min; k<=k_max; k++)
			R = (R + v[k]) % P;
		
		if (ID != 0) {
			PutInt(0, R);
			Send(0);
		} else {
			bool N0 = false;
			
			for (int i=1; i<NODES; i++) {
				Receive(i);
				int ri = GetInt(i);
				if (ri < 0) {
					N0 = true;
				} else {	
					R = (R + ri) % P;
				}
			}
			
			if (N0) {
				// przelicz za pozostale instancje
				for (int k=k_max+1; k<(K+1)/2; k++)
					R = (R + v[k]) % P;
			}
			
			cout << R << endl;
		}
	}

	return 0;
}