oj.uz

Submission #984125

# Submission time Handle Problem Language Result Execution time Memory
984125 2024-05-16T10:25:33 Z Aiperiii Boat (APIO16_boat) C++14
9 / 100
 2000 ms 15704 KB 
#include <bits/stdc++.h>
#define int long long
#define ull unsigned long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int mod=1e9+7;
int f[505];
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    f[1]=1;
    for(int i=2;i<=500;i++){
        f[i]=f[i-1]*i;
        f[i]%=mod;
    }
    int n;
    cin>>n;
    vector <int> a(n+1),b(n+1);
    map <int,int> ed;
    set <int> v;
    for(int i=1;i<=n;i++){
        cin>>a[i]>>b[i];
        v.insert(a[i]);
        v.insert(b[i]);
        ed[b[i]]++;
    }
    int p=-1;
    vector <pair <int,int> > r;
    for(auto x : v){
        if(p!=-1 && x-1>=p)r.pb({p,x-1});
        if(ed[x]){
            r.pb({x,x});
            p=x+1;
        }
        else p=x;
    }
    if(p==*v.begin())r.pb({p,p});
    //for(auto x : r)cout<<x.ff<<" "<<x.ss<<"\n";
    
    vector <vector <int> > val(n+1,vector <int> (r.size())),cnt(n+1,vector <int> (r.size())),add(n+1,vector <int> (r.size()));
    for(int i=1;i<=n;i++){
        for(int j=0;j<r.size();j++){
            if(a[i]<=r[j].ff && r[j].ss<=b[i]){
                cnt[i][j]=r[j].ss-r[j].ff+1;
                val[i][j]=1;
            }
            //cout<<cnt[i][j]<<" ";
        }
      //  cout<<"\n";
    }
    
    for(int i=1;i<=n;i++){
        for(int j=0;j<r.size();j++){
            if(a[i]<=r[j].ff && r[j].ss<=b[i]){
                for(int k=1;k<i;k++){
                    for(int q=0;q<j;q++){
                        val[i][j]+=val[k][q]*cnt[k][q];
                        val[i][j]%=mod;
                        val[i][j]+=add[k][q];
                        val[i][j]%=mod;
                    }
                    add[i][j]+=val[k][j]*f[cnt[i][j]-1];
                    add[i][j]%=mod;
                }
            }
        }
    }
    int ans=0;
    for(int i=1;i<=n;i++){
        for(int j=0;j<r.size();j++){
            ans+=val[i][j]*cnt[i][j];
            ans%=mod;
            ans+=add[i][j];
            ans%=mod;
            //cout<<val[i][j]<<" ";
        }
        //cout<<"\n";
    }
    cout<<ans<<"\n";
}
/*
 3
 1 10
 3 10
 8 15
 
2
1 2
2 3
*/

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:45:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for(int j=0;j<r.size();j++){
      |                     ~^~~~~~~~~
boat.cpp:56:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for(int j=0;j<r.size();j++){
      |                     ~^~~~~~~~~
boat.cpp:73:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |         for(int j=0;j<r.size();j++){
      |                     ~^~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 498 ms 12320 KB Output is correct
2 Correct 493 ms 12316 KB Output is correct
3 Correct 483 ms 12124 KB Output is correct
4 Correct 476 ms 12324 KB Output is correct
5 Correct 501 ms 12320 KB Output is correct
6 Correct 642 ms 12324 KB Output is correct
7 Correct 640 ms 12320 KB Output is correct
8 Correct 637 ms 12372 KB Output is correct
9 Correct 631 ms 12332 KB Output is correct
10 Correct 638 ms 12372 KB Output is correct
11 Correct 637 ms 12320 KB Output is correct
12 Correct 632 ms 12124 KB Output is correct
13 Correct 643 ms 12324 KB Output is correct
14 Correct 637 ms 12316 KB Output is correct
15 Correct 634 ms 12368 KB Output is correct
16 Correct 64 ms 2556 KB Output is correct
17 Correct 68 ms 2652 KB Output is correct
18 Correct 66 ms 2392 KB Output is correct
19 Correct 66 ms 2736 KB Output is correct
20 Correct 68 ms 2820 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 498 ms 12320 KB Output is correct
2 Correct 493 ms 12316 KB Output is correct
3 Correct 483 ms 12124 KB Output is correct
4 Correct 476 ms 12324 KB Output is correct
5 Correct 501 ms 12320 KB Output is correct
6 Correct 642 ms 12324 KB Output is correct
7 Correct 640 ms 12320 KB Output is correct
8 Correct 637 ms 12372 KB Output is correct
9 Correct 631 ms 12332 KB Output is correct
10 Correct 638 ms 12372 KB Output is correct
11 Correct 637 ms 12320 KB Output is correct
12 Correct 632 ms 12124 KB Output is correct
13 Correct 643 ms 12324 KB Output is correct
14 Correct 637 ms 12316 KB Output is correct
15 Correct 634 ms 12368 KB Output is correct
16 Correct 64 ms 2556 KB Output is correct
17 Correct 68 ms 2652 KB Output is correct
18 Correct 66 ms 2392 KB Output is correct
19 Correct 66 ms 2736 KB Output is correct
20 Correct 68 ms 2820 KB Output is correct
21 Execution timed out 2023 ms 15704 KB Time limit exceeded
22 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 1884 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 498 ms 12320 KB Output is correct
2 Correct 493 ms 12316 KB Output is correct
3 Correct 483 ms 12124 KB Output is correct
4 Correct 476 ms 12324 KB Output is correct
5 Correct 501 ms 12320 KB Output is correct
6 Correct 642 ms 12324 KB Output is correct
7 Correct 640 ms 12320 KB Output is correct
8 Correct 637 ms 12372 KB Output is correct
9 Correct 631 ms 12332 KB Output is correct
10 Correct 638 ms 12372 KB Output is correct
11 Correct 637 ms 12320 KB Output is correct
12 Correct 632 ms 12124 KB Output is correct
13 Correct 643 ms 12324 KB Output is correct
14 Correct 637 ms 12316 KB Output is correct
15 Correct 634 ms 12368 KB Output is correct
16 Correct 64 ms 2556 KB Output is correct
17 Correct 68 ms 2652 KB Output is correct
18 Correct 66 ms 2392 KB Output is correct
19 Correct 66 ms 2736 KB Output is correct
20 Correct 68 ms 2820 KB Output is correct
21 Execution timed out 2023 ms 15704 KB Time limit exceeded
22 Halted 0 ms 0 KB -