Submission #1164470

#	Time	Username	Problem	Language	Result	Execution time	Memory
1164470		asli_bg	Kućice (COCI21_kucice)	C++20	10 / 110	1 ms	328 KiB

Main

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

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;

#define int long long

typedef pair<int,int> pii;
typedef vector<pii> vii;
typedef vector<int> vi;
typedef vector<bool> vb;

#define FOR(i,a) for(int i=0;i<(a);i++)
#define FORE(i,a,b) for(int i=(a);i<(b);i++)

#define all(x) x.begin(),x.end()
#define fi first
#define se second
#define pb push_back
#define sp <<" "<<

#define cont(x) for(auto el:x) cout<<el<<' ';cout<<endl;
#define contp(x) for(auto el:x) cout<<el.fi<<'-'<<el.se<<' ';cout<<endl;

#define DEBUG(x) cout<<#x sp x<<endl;
#define carp(x,y) ((x%MOD)*(y%MOD))%MOD
#define topla(x,y) ((x%MOD)+(y%MOD))%MOD
#define mid (l+r)/2

const int MAXN=1e3+5;
const int INF=1e18;
const int MOD=1e9+7;

int fac[MAXN];

int exp(int x,int us){
    int res=1;
    while(us>0){
        if(us&1) res=carp(res,x);
        x=carp(x,x);
        us/=2;
    }
    return res;
}

void calc(){
    fac[0]=fac[1]=1;
    FORE(i,2,MAXN) fac[i]=carp(fac[i-1],i);
}

int inv(int x){
    return exp(x,MOD-2);
}

int comb(int n,int r){
    if(n<r) return 0;
    return carp(fac[n],carp(inv(fac[n-r]),inv(fac[r])));
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    calc();

    int n;
    cin>>n;
    vii a(n+1);
    FORE(i,1,n+1) cin>>a[i].fi>>a[i].se;

    int pay=0;
    FORE(i,1,n+1){
        int deg=carp(comb(n,i),i);
        pay=topla(pay,deg);
    }

    cout<<pay<<endl;
}   

• Subtask 1: 10 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 10
• Subtask 4: 0 / 30
• Subtask 5: 0 / 30