#ifndef LOCAL
#pragma GCC optimize("O3")
#endif
#include <bits/stdc++.h>
#define FOR(i,p,k) for(int i=(p);i<=(k);++i)
#define REP(i,n) FOR(i,0,(n)-1)
#define RFOR(i,p,n) for(int i=(p);i>=(n);--i)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define ssize(x) int((x).size())
#define fi first
#define se second
#define V vector
#define pb push_back
#define eb emplace_back
#define C const
#define pn printf("\n")
using namespace std;
typedef long long ll;
typedef V<int> vi;
typedef V<ll> vll;
typedef const int ci;
typedef const ll cll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
void chmin(auto &a, auto b){a=min(a,b);}
void chmax(auto &a, auto b){a=max(a,b);}
ci inf = 2.1e9;
cll infll = 4.5e18;
int I(){
int z;
scanf("%d", &z);
//cin >> z;
return z;
}
int mod;
int add(int a, int b){
return a+b < mod ? a+b : a+b-mod;
}
int mul(int a, int b){
return int(ll(a)*b%mod);
}
int pot(int a, int b = mod-2){
int ret = 1;
for(; b; b /= 2, a = mul(a, a)) if(b&1) ret = mul(ret, a);
return ret;
}
void answer(){
int a = I(), b = I(), c = I();
mod = I();
if(c == a+b-1){
int n = a*b;
int wyn = 1;
REP(i, a) REP(j, b) wyn = mul(wyn, i+j+1);
int silnia = 1;
FOR(i, 1, n) silnia = mul(silnia, i);
wyn = mul(silnia, pot(wyn));
wyn = mul(wyn, wyn);
printf("%d %d\n", n, wyn);
return;
}
int n = a*b;
int mniej = a+b-1-c;
n -= mniej*(mniej+1)/2;
int wyn = 0;
vi perm(n);
REP(i, n) perm[i] = i;
do{
vi rosnacy(n, 1);
REP(i, n) REP(j, i) if(perm[j] < perm[i]) chmax(rosnacy[i], rosnacy[j]+1);
vi malejacy(n, 1);
RFOR(i, n-1, 0) FOR(j, i+1, n-1) if(perm[j] < perm[i]) chmax(malejacy[i], malejacy[j]+1);
int lis = 0;
REP(i, n) chmax(lis, rosnacy[i]);
int dis = 0;
REP(i, n) chmax(dis, malejacy[i]);
int lids = 0;
REP(i, n) chmax(lids, rosnacy[i]+malejacy[i]-1);
if(lis == a && dis == b && lids == c) ++wyn;
} while(next_permutation(all(perm)));
printf("%d %d\n", n, wyn);
}
int main(){
//ios_base::sync_with_stdio(0);
//cin.tie(0);
int tt = 1;
//tt = I();
while(tt--) answer();
}
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 | #ifndef LOCAL #pragma GCC optimize("O3") #endif #include <bits/stdc++.h> #define FOR(i,p,k) for(int i=(p);i<=(k);++i) #define REP(i,n) FOR(i,0,(n)-1) #define RFOR(i,p,n) for(int i=(p);i>=(n);--i) #define all(x) (x).begin(),(x).end() #define rall(x) (x).rbegin(),(x).rend() #define ssize(x) int((x).size()) #define fi first #define se second #define V vector #define pb push_back #define eb emplace_back #define C const #define pn printf("\n") using namespace std; typedef long long ll; typedef V<int> vi; typedef V<ll> vll; typedef const int ci; typedef const ll cll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; void chmin(auto &a, auto b){a=min(a,b);} void chmax(auto &a, auto b){a=max(a,b);} ci inf = 2.1e9; cll infll = 4.5e18; int I(){ int z; scanf("%d", &z); //cin >> z; return z; } int mod; int add(int a, int b){ return a+b < mod ? a+b : a+b-mod; } int mul(int a, int b){ return int(ll(a)*b%mod); } int pot(int a, int b = mod-2){ int ret = 1; for(; b; b /= 2, a = mul(a, a)) if(b&1) ret = mul(ret, a); return ret; } void answer(){ int a = I(), b = I(), c = I(); mod = I(); if(c == a+b-1){ int n = a*b; int wyn = 1; REP(i, a) REP(j, b) wyn = mul(wyn, i+j+1); int silnia = 1; FOR(i, 1, n) silnia = mul(silnia, i); wyn = mul(silnia, pot(wyn)); wyn = mul(wyn, wyn); printf("%d %d\n", n, wyn); return; } int n = a*b; int mniej = a+b-1-c; n -= mniej*(mniej+1)/2; int wyn = 0; vi perm(n); REP(i, n) perm[i] = i; do{ vi rosnacy(n, 1); REP(i, n) REP(j, i) if(perm[j] < perm[i]) chmax(rosnacy[i], rosnacy[j]+1); vi malejacy(n, 1); RFOR(i, n-1, 0) FOR(j, i+1, n-1) if(perm[j] < perm[i]) chmax(malejacy[i], malejacy[j]+1); int lis = 0; REP(i, n) chmax(lis, rosnacy[i]); int dis = 0; REP(i, n) chmax(dis, malejacy[i]); int lids = 0; REP(i, n) chmax(lids, rosnacy[i]+malejacy[i]-1); if(lis == a && dis == b && lids == c) ++wyn; } while(next_permutation(all(perm))); printf("%d %d\n", n, wyn); } int main(){ //ios_base::sync_with_stdio(0); //cin.tie(0); int tt = 1; //tt = I(); while(tt--) answer(); } |
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