Submission #443994

#	Time	Username	Problem	Language	Result	Execution time	Memory
443994		JovanB	Fishing Game (RMI19_fishing)	C++17	100 / 100	1959 ms	117016 KiB

fishing

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

using ll = long long;
using ld = long double;

const int MOD = 1000000007;

int add(int a, int b){ a += b; if(a >= MOD) a -= MOD; return a; }
int mul(int a, int b){ return (1LL*a*b)%MOD; }

vector <int> pos[605];

const int G = 205;

int hsh(int a, int b, int c, int turn, int dis){
    return G*G*G*a + G*G*b + G*c + 10*turn + dis;
}

map <int, int> dp;

int resi(int a, int b, int c, int turn, int dis){
    /// a = 1 i 2
    /// b = 2 i 3
    /// c = 3 i 1
    if(a == 0 && b == 0 && c == 0) return 1;
    int k = dp[hsh(a, b, c, turn, dis)];
    if(k) return k-1;
    if(turn == 1){
        if(a > 0) k = add(k, mul(a, resi(a-1, b, c, 2, 1)));
        if(c > 0) k = add(k, mul(c, resi(a, b+1, c-1, 2, dis)));
        if(a == 0 && c == 0) k = add(k, resi(a, b, c, 2, dis));
    }
    else if(turn == 2){
        if(b > 0) k = add(k, mul(b, resi(a, b-1, c, 3, 1)));
        if(a > 0) k = add(k, mul(a, resi(a-1, b, c+1, 3, dis)));
        if(a == 0 && b == 0) k = add(k, resi(a, b, c, 3, dis));
    }
    else{
        if(c > 0) k = add(k, mul(c, resi(a, b, c-1, 1, 0)));
        if(dis && b > 0) k = add(k, mul(b, resi(a+1, b-1, c, 1, 0)));
        if(c == 0 && b == 0 && dis) k = add(k, resi(a, b, c, 1, 0));
    }
    dp[hsh(a, b, c, turn, dis)] = k+1;
    return k;
}

void solve(int n){
    for(int i=1; i<=3*n; i++) pos[i].clear();
    for(int i=1; i<=2*n; i++){
        int x;
        cin >> x;
        pos[x].push_back(1);
    }
    for(int i=1; i<=2*n; i++){
        int x;
        cin >> x;
        pos[x].push_back(2);
    }
    for(int i=1; i<=2*n; i++){
        int x;
        cin >> x;
        pos[x].push_back(3);
    }
    int ima1 = 0, ima2 = 0, ima3 = 0;
    for(int i=1; i<=3*n; i++){
        if(pos[i].size() >= 2 && pos[i][0] != pos[i][1]){
            if(pos[i][0] == 1){
                if(pos[i][1] == 2) ima1++;
                else ima3++;
            }
            else ima2++;
        }
    }
    cout << resi(ima1, ima2, ima3, 1, 0) << "\n";
}

int main(){
    ios_base::sync_with_stdio(false), cin.tie(0);
    cout.precision(10);
    cout << fixed;

    int n, t;
    cin >> n >> t;
    while(t--) solve(n);
    return 0;
}

• Subtask 1: 100 / 100