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답안 #796404

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
796404 2023-07-28T11:14:50 Z Rafi22 말 (IOI15_horses) C++14
100 / 100
 656 ms 53096 KB 
#include <bits/stdc++.h>
#include "horses.h"

using namespace std;

#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;

const int pot=1<<19,N=500007;

ll pw(ll a,int b)
{
    ll res=1;
    while(b)
    {
        if(b%2) res=res*a%mod;
        a=a*a%mod;
        b/=2;
    }
    return res;
}

int seg[2*pot+7];

void ins(int v,int x)
{
    v+=pot-1;
    seg[v]=x;
    while(v>1)
    {
        v/=2;
        seg[v]=max(seg[2*v],seg[2*v+1]);
    }
}
int que(int v,int a,int b,int l,int r)
{
    if(a<=l&&b>=r) return seg[v];
    if(r<a||l>b) return 0;
    return max(que(2*v,a,b,l,(l+r)/2),que(2*v+1,a,b,(l+r)/2+1,r));
}
set<int>S;

ll inv[N],x[N];
ll T=1;

ll get()
{
    ll W=T,p=1;
    vector<int>V;
    for(auto i:S)
    {
        if(p>1000000000) break;
        W=W*inv[-i]%mod;
        p=p*x[-i];
        V.pb(-i);
    }
    reverse(all(V));
    __int128 ans=que(1,1,pot,1,pot),t=1;
    for(auto i:V)
    {
        //cout<<i<<" "<<que(1,i,pot,1,pot)<<endl;
        t=t*x[i];
        ans=max(ans,t*(__int128)que(1,i,pot,1,pot));
    }
    return ans%mod*W%mod;
}

int init(int n,int X[],int Y[])
{
    for(int i=0;i<n;i++) seg[i+pot]=Y[i];
    for(int i=pot-1;i>0;i--) seg[i]=max(seg[2*i],seg[2*i+1]);
    for(int i=0;i<n;i++)
    {
        T=T*X[i]%mod;
        x[i+1]=X[i];
        inv[i+1]=pw(X[i],mod-2);
        if(X[i]>1) S.insert(-(i+1));
    }
    return get();
}


int updateX(int i,int v)
{
    i++;
    T=T*inv[i]%mod;
    S.erase(-i);
    T=T*(ll)v%mod;
    inv[i]=pw(v,mod-2);
    if(v>1) S.insert(-i);
    x[i]=v;
    return get();
}

int updateY(int i,int v)
{
    i++;
    ins(i,v);
    return get();
}

/*
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cout<<init(3,{2,1,3},{3,4,1})<<endl;
    cout<<updateY(1,2)<<endl;


    return 0;
}*/

Compilation message

horses.cpp: In function 'long long int get()':
horses.cpp:73:21: warning: conversion from '__int128' to 'long long int' may change value [-Wconversion]
   73 |     return ans%mod*W%mod;
      |            ~~~~~~~~~^~~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:84:29: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   84 |         inv[i+1]=pw(X[i],mod-2);
      |                          ~~~^~
horses.cpp:87:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   87 |     return get();
      |            ~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:97:20: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   97 |     inv[i]=pw(v,mod-2);
      |                 ~~~^~
horses.cpp:100:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  100 |     return get();
      |            ~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:107:15: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
  107 |     return get();
      |            ~~~^~

Subtask #1
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2260 KB Output is correct
2 Correct 2 ms 2260 KB Output is correct
3 Correct 2 ms 2260 KB Output is correct
4 Correct 2 ms 2260 KB Output is correct
5 Correct 2 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 3 ms 2372 KB Output is correct
11 Correct 2 ms 2260 KB Output is correct
12 Correct 2 ms 2260 KB Output is correct
13 Correct 2 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 2 ms 2260 KB Output is correct
17 Correct 2 ms 2260 KB Output is correct
18 Correct 2 ms 2260 KB Output is correct
19 Correct 2 ms 2260 KB Output is correct
20 Correct 2 ms 2260 KB Output is correct

Subtask #2
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2260 KB Output is correct
2 Correct 2 ms 2260 KB Output is correct
3 Correct 2 ms 2260 KB Output is correct
4 Correct 2 ms 2260 KB Output is correct
5 Correct 2 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 2 ms 2260 KB Output is correct
11 Correct 2 ms 2260 KB Output is correct
12 Correct 3 ms 2260 KB Output is correct
13 Correct 2 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 2 ms 2260 KB Output is correct
17 Correct 2 ms 2260 KB Output is correct
18 Correct 2 ms 2260 KB Output is correct
19 Correct 2 ms 2260 KB Output is correct
20 Correct 2 ms 2260 KB Output is correct
21 Correct 2 ms 2260 KB Output is correct
22 Correct 3 ms 2260 KB Output is correct
23 Correct 3 ms 2388 KB Output is correct
24 Correct 3 ms 2376 KB Output is correct
25 Correct 3 ms 2388 KB Output is correct
26 Correct 3 ms 2388 KB Output is correct
27 Correct 6 ms 2388 KB Output is correct
28 Correct 5 ms 2388 KB Output is correct
29 Correct 3 ms 2388 KB Output is correct
30 Correct 3 ms 2388 KB Output is correct
31 Correct 5 ms 2384 KB Output is correct
32 Correct 8 ms 2388 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 645 ms 40480 KB Output is correct
2 Correct 410 ms 40428 KB Output is correct
3 Correct 386 ms 40464 KB Output is correct
4 Correct 515 ms 40464 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2260 KB Output is correct
2 Correct 2 ms 2260 KB Output is correct
3 Correct 2 ms 2260 KB Output is correct
4 Correct 2 ms 2260 KB Output is correct
5 Correct 2 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 2 ms 2260 KB Output is correct
11 Correct 2 ms 2260 KB Output is correct
12 Correct 2 ms 2260 KB Output is correct
13 Correct 2 ms 2260 KB Output is correct
14 Correct 2 ms 2260 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 2 ms 2260 KB Output is correct
17 Correct 2 ms 2260 KB Output is correct
18 Correct 2 ms 2260 KB Output is correct
19 Correct 2 ms 2260 KB Output is correct
20 Correct 2 ms 2260 KB Output is correct
21 Correct 2 ms 2260 KB Output is correct
22 Correct 2 ms 2260 KB Output is correct
23 Correct 3 ms 2388 KB Output is correct
24 Correct 3 ms 2388 KB Output is correct
25 Correct 3 ms 2388 KB Output is correct
26 Correct 3 ms 2388 KB Output is correct
27 Correct 6 ms 2388 KB Output is correct
28 Correct 4 ms 2388 KB Output is correct
29 Correct 3 ms 2388 KB Output is correct
30 Correct 3 ms 2388 KB Output is correct
31 Correct 4 ms 2384 KB Output is correct
32 Correct 6 ms 2388 KB Output is correct
33 Correct 131 ms 20276 KB Output is correct
34 Correct 127 ms 20176 KB Output is correct
35 Correct 294 ms 50480 KB Output is correct
36 Correct 294 ms 50404 KB Output is correct
37 Correct 149 ms 18332 KB Output is correct
38 Correct 198 ms 31112 KB Output is correct
39 Correct 122 ms 18100 KB Output is correct
40 Correct 281 ms 45544 KB Output is correct
41 Correct 138 ms 18112 KB Output is correct
42 Correct 150 ms 18256 KB Output is correct
43 Correct 276 ms 45916 KB Output is correct
44 Correct 278 ms 45912 KB Output is correct

Subtask #5
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2260 KB Output is correct
2 Correct 1 ms 2260 KB Output is correct
3 Correct 2 ms 2260 KB Output is correct
4 Correct 2 ms 2260 KB Output is correct
5 Correct 1 ms 2260 KB Output is correct
6 Correct 2 ms 2260 KB Output is correct
7 Correct 2 ms 2260 KB Output is correct
8 Correct 2 ms 2260 KB Output is correct
9 Correct 2 ms 2260 KB Output is correct
10 Correct 2 ms 2260 KB Output is correct
11 Correct 2 ms 2260 KB Output is correct
12 Correct 1 ms 2260 KB Output is correct
13 Correct 2 ms 2260 KB Output is correct
14 Correct 2 ms 2352 KB Output is correct
15 Correct 2 ms 2260 KB Output is correct
16 Correct 2 ms 2260 KB Output is correct
17 Correct 2 ms 2260 KB Output is correct
18 Correct 2 ms 2260 KB Output is correct
19 Correct 2 ms 2260 KB Output is correct
20 Correct 2 ms 2260 KB Output is correct
21 Correct 2 ms 2260 KB Output is correct
22 Correct 2 ms 2260 KB Output is correct
23 Correct 3 ms 2388 KB Output is correct
24 Correct 3 ms 2388 KB Output is correct
25 Correct 3 ms 2388 KB Output is correct
26 Correct 3 ms 2436 KB Output is correct
27 Correct 6 ms 2432 KB Output is correct
28 Correct 4 ms 2388 KB Output is correct
29 Correct 3 ms 2388 KB Output is correct
30 Correct 3 ms 2388 KB Output is correct
31 Correct 5 ms 2388 KB Output is correct
32 Correct 6 ms 2388 KB Output is correct
33 Correct 656 ms 44320 KB Output is correct
34 Correct 418 ms 53096 KB Output is correct
35 Correct 413 ms 44192 KB Output is correct
36 Correct 510 ms 48124 KB Output is correct
37 Correct 127 ms 20164 KB Output is correct
38 Correct 125 ms 20076 KB Output is correct
39 Correct 302 ms 50468 KB Output is correct
40 Correct 289 ms 50396 KB Output is correct
41 Correct 149 ms 18300 KB Output is correct
42 Correct 197 ms 31028 KB Output is correct
43 Correct 122 ms 18092 KB Output is correct
44 Correct 293 ms 45520 KB Output is correct
45 Correct 140 ms 18120 KB Output is correct
46 Correct 149 ms 18196 KB Output is correct
47 Correct 274 ms 45860 KB Output is correct
48 Correct 287 ms 45868 KB Output is correct
49 Correct 201 ms 23136 KB Output is correct
50 Correct 188 ms 23192 KB Output is correct
51 Correct 454 ms 52280 KB Output is correct
52 Correct 374 ms 51820 KB Output is correct
53 Correct 520 ms 21400 KB Output is correct
54 Correct 410 ms 34980 KB Output is correct
55 Correct 177 ms 19152 KB Output is correct
56 Correct 364 ms 47332 KB Output is correct
57 Correct 396 ms 19828 KB Output is correct
58 Correct 504 ms 20320 KB Output is correct
59 Correct 270 ms 45788 KB Output is correct