oj.uz

Submission #491401

# Submission time Handle Problem Language Result Execution time Memory
491401 2021-12-02T00:30:24 Z rrrr10000 Boat (APIO16_boat) C++14
9 / 100
 75 ms 8208 KB 
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n)  for(long long i=0;i<(long long)(n);i++)
#define REP(i,k,n) for(long long i=k;i<(long long)(n);i++)
#define pb emplace_back
#define lb(v,k) (lower_bound(all(v),(k))-v.begin())
#define ub(v,k) (upper_bound(all(v),(k))-v.begin())
#define fi first
#define se second
#define pi M_PI
#define PQ(T) priority_queue<T>
#define SPQ(T) priority_queue<T,vector<T>,greater<T>>
#define dame(a) {out(a);return 0;}
#define decimal cout<<fixed<<setprecision(15);
#define all(a) a.begin(),a.end()
#define rsort(a) {sort(all(a));reverse(all(a));}
#define dupli(a) {sort(all(a));a.erase(unique(all(a)),a.end());}
#define popcnt __builtin_popcountll
typedef long long ll;
typedef pair<ll,ll> P;
typedef tuple<ll,ll,ll> PP;
typedef tuple<ll,ll,ll,ll> PPP;
using vi=vector<ll>;
using vvi=vector<vi>;
using vvvi=vector<vvi>;
using vvvvi=vector<vvvi>;
using vp=vector<P>;
using vvp=vector<vp>;
using vb=vector<bool>;
using vvb=vector<vb>;
const ll inf=1001001001001001001;
const ll INF=1001001001;
const ll mod=1000000007;
const double eps=1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void out(T a){cout<<a<<'\n';}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);}
template<class T> void yesno(T b){if(b)out("yes");else out("no");}
template<class T> void YesNo(T b){if(b)out("Yes");else out("No");}
template<class T> void YESNO(T b){if(b)out("YES");else out("NO");}
template<class T> void outset(T s){auto itr=s.begin();while(itr!=s.end()){if(itr!=s.begin())cout<<' ';cout<<*itr;itr++;}cout<<'\n';}
void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;}

int main(){
    ll n;cin>>n;
    vp v(n);
    vi srt;
    rep(i,n){
        cin>>v[i].fi>>v[i].se;v[i].se++;
        srt.pb(v[i].fi);
        srt.pb(v[i].se);
    }
    dupli(srt);
    rep(i,n){
        v[i].fi=lb(srt,v[i].fi);
        v[i].se=lb(srt,v[i].se);
    }
    ll m=srt.size();
    vvi dp(m,vi(n+1)),table(m-1,vi(n+1));
    rep(i,m-1){
        table[i][0]=1;
        REP(j,1,n+1){
            table[i][j]=table[i][j-1]*(srt[i+1]-srt[i]-j+1)%mod*modpow(j,mod-2);
        }
    }
    rep(i,m)dp[i][0]=1;
    rep(j,n+1)dp[0][j]=1;
    REP(i,1,m)REP(j,1,n+1){
        dp[i][j]=dp[i-1][j]+dp[i][j-1]-dp[i-1][j-1];
        for(int k=j;k;k--){
            if(i-1<v[k-1].fi||v[k-1].se<=i-1)break;
            dp[i][j]+=table[i-1][j-k+1]*dp[i-1][k-1]%mod;
        }
        dp[i][j]%=mod;
    }
    // outvv(dp);
    if(dp[m-1][n]<=0)dp[m-1][n]+=mod;
    out(dp[m-1][n]-1);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 8140 KB Output is correct
2 Correct 72 ms 8140 KB Output is correct
3 Correct 73 ms 8140 KB Output is correct
4 Correct 74 ms 8140 KB Output is correct
5 Correct 74 ms 8140 KB Output is correct
6 Correct 73 ms 8140 KB Output is correct
7 Correct 72 ms 8140 KB Output is correct
8 Correct 75 ms 8140 KB Output is correct
9 Correct 73 ms 8208 KB Output is correct
10 Correct 72 ms 8140 KB Output is correct
11 Correct 72 ms 8108 KB Output is correct
12 Correct 74 ms 8140 KB Output is correct
13 Correct 74 ms 8140 KB Output is correct
14 Correct 74 ms 8140 KB Output is correct
15 Correct 73 ms 8208 KB Output is correct
16 Correct 13 ms 1612 KB Output is correct
17 Correct 15 ms 1740 KB Output is correct
18 Correct 14 ms 1740 KB Output is correct
19 Correct 15 ms 1740 KB Output is correct
20 Correct 14 ms 1740 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 8140 KB Output is correct
2 Correct 72 ms 8140 KB Output is correct
3 Correct 73 ms 8140 KB Output is correct
4 Correct 74 ms 8140 KB Output is correct
5 Correct 74 ms 8140 KB Output is correct
6 Correct 73 ms 8140 KB Output is correct
7 Correct 72 ms 8140 KB Output is correct
8 Correct 75 ms 8140 KB Output is correct
9 Correct 73 ms 8208 KB Output is correct
10 Correct 72 ms 8140 KB Output is correct
11 Correct 72 ms 8108 KB Output is correct
12 Correct 74 ms 8140 KB Output is correct
13 Correct 74 ms 8140 KB Output is correct
14 Correct 74 ms 8140 KB Output is correct
15 Correct 73 ms 8208 KB Output is correct
16 Correct 13 ms 1612 KB Output is correct
17 Correct 15 ms 1740 KB Output is correct
18 Correct 14 ms 1740 KB Output is correct
19 Correct 15 ms 1740 KB Output is correct
20 Correct 14 ms 1740 KB Output is correct
21 Incorrect 67 ms 7584 KB Output isn't correct
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 588 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 8140 KB Output is correct
2 Correct 72 ms 8140 KB Output is correct
3 Correct 73 ms 8140 KB Output is correct
4 Correct 74 ms 8140 KB Output is correct
5 Correct 74 ms 8140 KB Output is correct
6 Correct 73 ms 8140 KB Output is correct
7 Correct 72 ms 8140 KB Output is correct
8 Correct 75 ms 8140 KB Output is correct
9 Correct 73 ms 8208 KB Output is correct
10 Correct 72 ms 8140 KB Output is correct
11 Correct 72 ms 8108 KB Output is correct
12 Correct 74 ms 8140 KB Output is correct
13 Correct 74 ms 8140 KB Output is correct
14 Correct 74 ms 8140 KB Output is correct
15 Correct 73 ms 8208 KB Output is correct
16 Correct 13 ms 1612 KB Output is correct
17 Correct 15 ms 1740 KB Output is correct
18 Correct 14 ms 1740 KB Output is correct
19 Correct 15 ms 1740 KB Output is correct
20 Correct 14 ms 1740 KB Output is correct
21 Incorrect 67 ms 7584 KB Output isn't correct
22 Halted 0 ms 0 KB -