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Submission #124348

# Submission time Handle Problem Language Result Execution time Memory
124348 2019-07-03T06:57:24 Z Mtaylor Boat (APIO16_boat) C++14
9 / 100
 2000 ms 231220 KB 
#include <bits/stdc++.h>
 
    using namespace std;
    typedef long long ll;
    typedef vector<ll> vl ;
 
    #define mp make_pair
    #define pb push_back
    #define f first
    #define s second
    #define all(v) (v).begin(),(v).end()
 
 
    const int MOD = 1000000007;
    const int N = 1000009;
    const double PI =4*atan(1);
    const double eps = 1e-7;
    
    ll n;
    map<ll,ll> maa;
    map<ll,ll> mal;
    set<ll> ss;
    ll a[N];
    ll b[N];
    ll c[N];
    ll d[N];
    ll tree[N];
    ll tree2[N];
 
    void update(ll x, ll val){
        for(;x<=1000009;x+=(x)&(-x)){
            tree[x]+=val;
            tree[x]%=MOD;
        }
    }
 
    ll get(ll x){
        ll to_return =0;
        for(;x>0;x-=x&(-x)){
            to_return +=tree[x];
            to_return %=MOD;
        }
        return to_return;
    }
 
 
    int main(){
        //ios::sync_with_stdio(0);
        //freopen("easy.txt","r",stdin);
        cin >> n;
        for(int i=0;i<n;i++){
        	scanf("%lld",&a[i]);
            scanf("%lld",&b[i]);
            for(int j=a[i];j<=b[i];j++){
            	ss.insert(j);
            }
        }
        ll cnt=2;
        for(auto t:ss){
            mal[t]=cnt;
            maa[cnt]=t;
            cnt++;
        }
        ss.clear();
        update(1,1);
        ll ans=0;
        for(int i=0;i<n;i++){
            for(int j=mal[a[i]];j<=mal[b[i]];j++){
            	if(j==mal[a[i]])
                	ans+=get(j);
                else{
                	ans+=((maa[j]-maa[j-1])%MOD) * (get(j-1)+tree2[j-1])%MOD;
                }
                //cout << i << " " << maa[j] << " " << ans << endl;
                ans%=MOD;
            }
            for(int j=mal[b[i]];j>=mal[a[i]];j--){
                	ll x=get(j);
                	update(j+1,x);
                	//update2(j,x);
                	tree2[j]+=x;
                if(j!=mal[a[i]]){
                	ll x=(get(j-1)+ tree2[j-1])%MOD;
                	update(j,((x%MOD)*((maa[j]-maa[j-1]-1) % MOD))%MOD);
                }
            }
 
        }
        cout << ans;
        return 0;
    }

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:52:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
          scanf("%lld",&a[i]);
          ~~~~~^~~~~~~~~~~~~~
boat.cpp:53:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%lld",&b[i]);
             ~~~~~^~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 3 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 508 KB Output is correct
14 Correct 3 ms 420 KB Output is correct
15 Correct 3 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct

Subtask #2
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 3 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 508 KB Output is correct
14 Correct 3 ms 420 KB Output is correct
15 Correct 3 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 596 ms 1412 KB Output is correct
22 Correct 596 ms 1424 KB Output is correct
23 Correct 568 ms 1412 KB Output is correct
24 Correct 627 ms 1412 KB Output is correct
25 Correct 623 ms 1528 KB Output is correct
26 Correct 604 ms 1288 KB Output is correct
27 Correct 621 ms 1172 KB Output is correct
28 Correct 649 ms 1276 KB Output is correct
29 Correct 673 ms 1204 KB Output is correct
30 Execution timed out 2077 ms 179540 KB Time limit exceeded
31 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2091 ms 231220 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 3 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 508 KB Output is correct
14 Correct 3 ms 420 KB Output is correct
15 Correct 3 ms 504 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 3 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 596 ms 1412 KB Output is correct
22 Correct 596 ms 1424 KB Output is correct
23 Correct 568 ms 1412 KB Output is correct
24 Correct 627 ms 1412 KB Output is correct
25 Correct 623 ms 1528 KB Output is correct
26 Correct 604 ms 1288 KB Output is correct
27 Correct 621 ms 1172 KB Output is correct
28 Correct 649 ms 1276 KB Output is correct
29 Correct 673 ms 1204 KB Output is correct
30 Execution timed out 2077 ms 179540 KB Time limit exceeded
31 Halted 0 ms 0 KB -