oj.uz

Submission #62412

# Submission time Handle Problem Language Result Execution time Memory
62412 2018-07-28T11:25:09 Z Tenuun Horses (IOI15_horses) C++11
37 / 100
 1500 ms 43048 KB 
#include<bits/stdc++.h>
#define mod 1000000007
#define ll long long

using namespace std;

int n, tr[2000000], id[500001];
ll bit[500001];
ll now=1;
vector<int>x, y;
set<int>a;

void update(int ind, int val){
	if(ind==0) return;
    while(ind<=500000){
        bit[ind]*=val;
        bit[ind]%=mod;
        ind+=ind&-ind;
    }
}

ll get(int ind){
    if(ind<0) return 1;
    ll ans=1;
    while(ind>0){
        ans*=bit[ind];
        ans%=mod;
        ind-=ind&-ind;
    }
    return ans;
}

void pre(){
    fill(bit, bit+500001, 1);
    a.insert(-1);
    a.insert(0);
    for(int i=0; i<n; i++){
        if(x[i]>1){
            a.insert(i);
            update(i+1, x[i]);
        }
    }
}

void build(int ind, int l, int r){
    if(l==r){
        tr[ind]=y[l];
        id[l]=ind;
        return;
    }
    build(ind*2, l, (l+r)/2);
    build(ind*2+1, (l+r)/2+1, r);
    tr[ind]=max(tr[ind*2], tr[ind*2+1]);
}

void upd(int ind){
    if(ind==0) return;
    tr[ind]=max(tr[ind*2], tr[ind*2+1]);
    upd(ind/2);
}

ll rmq(int ind, int l, int r, int L, int R){
    if(l==L && r==R) return tr[ind];
    int m=(l+r)/2;
    if(R<=m) return rmq(ind*2, l, m, L, R);
    else if(L>m) return rmq(ind*2+1, m+1, r, L, R);
    else{
        return max(rmq(ind*2, l, m, L, m), rmq(ind*2+1, m+1, r, m+1, R));
    }
}

ll find(){
    ll ans=1, t=rmq(1, 0, n-1, *prev(a.end()), n-1);
    ll now=t;
    set<int>::iterator it;
    for(it=prev(a.end()); it!=a.begin() && now<mod; it--){
        if(now*x[*it]>mod) {
            break;
        }
        now*=x[*it];
    }
    ans=now%mod;
    now/=t;
    for(set<int>::iterator tmp=prev((prev(a.end()))); tmp!=prev(it) && tmp!=a.begin(); tmp--){
        now/=x[*next(tmp)];
        ans=max(ans, now*rmq(1, 0, n-1, *tmp, *next(tmp)-1));
    }
    ans%=mod;
    if(it!=a.begin()) {
    	ans*=get(*it+1);
    }
    ans%=mod;
    return ans;
}

int init(int N, int X[], int Y[]) {
    n=N;
    for(int i=0; i<n; i++) {x.push_back(X[i]); y.push_back(Y[i]);}
    pre();
    build(1, 0, n-1);
    return find();
}

ll pw(ll o, ll p){
    if(p==0) return 1;
    ll ans=pw(o, p/2);
    ans*=ans;
    ans%=mod;
    if(p%2) ans*=o;
    ans%=mod;
    return ans;
}

int updateX(int pos, int val){
    if(x[pos]==1 && val==1) return find();
    if(x[pos]>1 && val>1){
        update(pos+1, (val*pw(x[pos], mod-2)%mod));
        x[pos]=val;
        return find();
    }
    if(x[pos]==1){
        a.insert(pos);
        update(pos+1, val);
        x[pos]=val;
    }
    else{
        a.erase(pos);
        update(pos+1, pw(x[pos], mod-2));
        x[pos]=1;
    }
    return find();
}

int updateY(int pos, int val){
    tr[id[pos]]=val;
    upd(id[pos]/2);
    return find();
}

Compilation message

horses.cpp: In function 'long long int find()':
horses.cpp:74:8: warning: declaration of 'now' shadows a global declaration [-Wshadow]
     ll now=t;
        ^~~
horses.cpp:9:4: note: shadowed declaration is here
 ll now=1;
    ^~~
horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:101:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return find();
            ~~~~^~
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:115:40: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     if(x[pos]==1 && val==1) return find();
                                    ~~~~^~
horses.cpp:117:45: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         update(pos+1, (val*pw(x[pos], mod-2)%mod));
                       ~~~~~~~~~~~~~~~~~~~~~~^~~~~
horses.cpp:119:20: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         return find();
                ~~~~^~
horses.cpp:128:25: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
         update(pos+1, pw(x[pos], mod-2));
                       ~~^~~~~~~~~~~~~~~
horses.cpp:131:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return find();
            ~~~~^~
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:137:16: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
     return find();
            ~~~~^~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4216 KB Output is correct
2 Correct 6 ms 4452 KB Output is correct
3 Correct 7 ms 4452 KB Output is correct
4 Correct 5 ms 4452 KB Output is correct
5 Correct 6 ms 4452 KB Output is correct
6 Correct 6 ms 4452 KB Output is correct
7 Correct 7 ms 4452 KB Output is correct
8 Correct 6 ms 4548 KB Output is correct
9 Correct 5 ms 4548 KB Output is correct
10 Correct 5 ms 4548 KB Output is correct
11 Correct 6 ms 4548 KB Output is correct
12 Correct 7 ms 4548 KB Output is correct
13 Correct 7 ms 4548 KB Output is correct
14 Correct 5 ms 4548 KB Output is correct
15 Correct 6 ms 4548 KB Output is correct
16 Correct 6 ms 4548 KB Output is correct
17 Correct 6 ms 4548 KB Output is correct
18 Correct 6 ms 4548 KB Output is correct
19 Correct 7 ms 4548 KB Output is correct
20 Correct 6 ms 4548 KB Output is correct

Subtask #2
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4548 KB Output is correct
2 Correct 7 ms 4548 KB Output is correct
3 Correct 5 ms 4548 KB Output is correct
4 Correct 6 ms 4548 KB Output is correct
5 Correct 6 ms 4548 KB Output is correct
6 Correct 6 ms 4548 KB Output is correct
7 Correct 5 ms 4548 KB Output is correct
8 Correct 6 ms 4548 KB Output is correct
9 Correct 7 ms 4548 KB Output is correct
10 Correct 7 ms 4548 KB Output is correct
11 Correct 5 ms 4548 KB Output is correct
12 Correct 7 ms 4548 KB Output is correct
13 Correct 6 ms 4548 KB Output is correct
14 Correct 6 ms 4548 KB Output is correct
15 Correct 6 ms 4548 KB Output is correct
16 Correct 8 ms 4548 KB Output is correct
17 Correct 5 ms 4548 KB Output is correct
18 Correct 6 ms 4548 KB Output is correct
19 Correct 6 ms 4548 KB Output is correct
20 Correct 7 ms 4548 KB Output is correct
21 Correct 6 ms 4548 KB Output is correct
22 Correct 5 ms 4548 KB Output is correct
23 Correct 6 ms 4548 KB Output is correct
24 Correct 8 ms 4604 KB Output is correct
25 Correct 6 ms 4620 KB Output is correct
26 Correct 6 ms 4620 KB Output is correct
27 Correct 9 ms 4636 KB Output is correct
28 Correct 7 ms 4644 KB Output is correct
29 Execution timed out 1574 ms 4644 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 490 ms 42892 KB Output is correct
2 Correct 434 ms 42892 KB Output is correct
3 Correct 368 ms 42932 KB Output is correct
4 Correct 335 ms 43048 KB Output is correct

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 43048 KB Output is correct
2 Correct 6 ms 43048 KB Output is correct
3 Correct 7 ms 43048 KB Output is correct
4 Correct 5 ms 43048 KB Output is correct
5 Correct 6 ms 43048 KB Output is correct
6 Correct 5 ms 43048 KB Output is correct
7 Correct 6 ms 43048 KB Output is correct
8 Correct 6 ms 43048 KB Output is correct
9 Correct 6 ms 43048 KB Output is correct
10 Correct 7 ms 43048 KB Output is correct
11 Correct 5 ms 43048 KB Output is correct
12 Correct 5 ms 43048 KB Output is correct
13 Correct 6 ms 43048 KB Output is correct
14 Correct 6 ms 43048 KB Output is correct
15 Correct 7 ms 43048 KB Output is correct
16 Correct 5 ms 43048 KB Output is correct
17 Correct 6 ms 43048 KB Output is correct
18 Correct 6 ms 43048 KB Output is correct
19 Correct 5 ms 43048 KB Output is correct
20 Correct 6 ms 43048 KB Output is correct
21 Correct 7 ms 43048 KB Output is correct
22 Correct 5 ms 43048 KB Output is correct
23 Correct 6 ms 43048 KB Output is correct
24 Correct 9 ms 43048 KB Output is correct
25 Correct 9 ms 43048 KB Output is correct
26 Correct 7 ms 43048 KB Output is correct
27 Correct 7 ms 43048 KB Output is correct
28 Correct 7 ms 43048 KB Output is correct
29 Execution timed out 1565 ms 43048 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 43048 KB Output is correct
2 Correct 7 ms 43048 KB Output is correct
3 Correct 8 ms 43048 KB Output is correct
4 Correct 6 ms 43048 KB Output is correct
5 Correct 5 ms 43048 KB Output is correct
6 Correct 5 ms 43048 KB Output is correct
7 Correct 6 ms 43048 KB Output is correct
8 Correct 7 ms 43048 KB Output is correct
9 Correct 7 ms 43048 KB Output is correct
10 Correct 6 ms 43048 KB Output is correct
11 Correct 6 ms 43048 KB Output is correct
12 Correct 6 ms 43048 KB Output is correct
13 Correct 5 ms 43048 KB Output is correct
14 Correct 6 ms 43048 KB Output is correct
15 Correct 7 ms 43048 KB Output is correct
16 Correct 5 ms 43048 KB Output is correct
17 Correct 6 ms 43048 KB Output is correct
18 Correct 5 ms 43048 KB Output is correct
19 Correct 7 ms 43048 KB Output is correct
20 Correct 6 ms 43048 KB Output is correct
21 Correct 7 ms 43048 KB Output is correct
22 Correct 7 ms 43048 KB Output is correct
23 Correct 6 ms 43048 KB Output is correct
24 Correct 6 ms 43048 KB Output is correct
25 Correct 7 ms 43048 KB Output is correct
26 Correct 6 ms 43048 KB Output is correct
27 Correct 8 ms 43048 KB Output is correct
28 Correct 6 ms 43048 KB Output is correct
29 Execution timed out 1581 ms 43048 KB Time limit exceeded
30 Halted 0 ms 0 KB -