oj.uz

Submission #32050

# Submission time Handle Problem Language Result Execution time Memory
32050 2017-09-23T11:02:08 Z osmanorhan Roller Coaster Railroad (IOI16_railroad) C++14
34 / 100
 186 ms 45292 KB 
#include "railroad.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define all( x ) x.begin(), x.end()
#define umin( x, y ) x = min( x, (y) )
#define umax( x, y ) x = max( x, (y) )
#define pb push_back

using namespace std;

typedef long long Lint;
typedef pair<int,int> ii;

const int inf = 1e9 + 137;
const int maxn = 200020;

int a, n;
ii segment[maxn*3];
vector<ii> inc, de;
vector<int> s, ti;

ii find( int l, int r ) {
    ii t = ii( inf, n+1 );
    for(l+=n, r+=n;l<=r;l=(l+1)>>1, r=(r-1)>>1) {
        if( l&1 ) umin( t, segment[l] );
        if( ~r&1 ) umin( t, segment[r] );
    }
    return t;
}

Lint dn[1<<17][20];
int used[1<<17][20];

Lint f( int n, int last ) {
    if( n == (1<<a)-1 ) return 0;
    if( used[n][last] ) return dn[n][last];
    used[n][last] = 1;
    Lint now = ti[last];
    Lint ret = 1e18;
    for(int i=0;i<a;i++)
        if( !((1<<i)&n) ) {
            umin( ret, f( n|(1<<i), i ) + max( 0ll, now-s[i] ) );
        }
    return dn[n][last] = ret;
}

bool comp( const ii &a, const ii &b ) {
    return a.se < b.se;
}

Lint plan_roller_coaster(vector<int> S, vector<int> Ti) {
    s = S;
    ti = Ti;
    a = s.size();

    if( s.size() < 17 ) {
        ti.pb( 1 );
        return f( 0, a );
    }
    for(int i=0;i<a;i++) {
        if( s[i] > ti[i] ) de.pb( ii( ti[i], s[i] ) );
        else inc.pb( ii( s[i], ti[i] ) );
    }
    sort( all( inc ) );
    sort( all( de ), comp );

    n = 1;
    while( n < inc.size() ) n <<= 1;

    for(int i=1;i<n+n;i++)
        segment[i] = ii( inf, n+1 );

    for(int i=0;i<inc.size();i++)
        segment[i+n] = ii( inc[i].se, i );

    for(int i=n-1;i>=1;i--)
        segment[i] = min( segment[i+i], segment[i+i+1] );
    int now = 1;
    for(int i=0;i<de.size();i++) {
        int last = de[i].se;
        //printf("asd--  %d %d\n",last,inc.size());
        bool flag = 1;
        int go = now;
        while( flag ) {
            ii t = find( lower_bound( all( inc ), ii( go, 0 ) ) - inc.begin(), n-1 );
                //printf("--- %d %d -- %d %d\n",t.fi,last,go,n-1);
            if( t.fi <= last ) {
                segment[t.se+n] = ii( inf, n+1 );
                for(int k=(t.se+n)>>1;k;k>>=1)
                    segment[k] = min( segment[k+k], segment[k+k+1] );
                go = t.fi;
            } else break;
        }
        now = de[i].fi;
    }
    while( 1 ) {
        ii t = find( lower_bound( all( inc ), ii( now, 0 ) ) - inc.begin(), n-1 );
        if( t.fi < inf ) {
            segment[t.se+n] = ii( inf, n+1 );
            for(int k=(t.se+n)>>1;k;k>>=1)
                segment[k] = min( segment[k+k], segment[k+k+1] );
            now = t.fi;
        } else break;
    }
    ii t = find( 0, n-1 );
    if( t.fi >= inf ) return 0;
    return 1;
}

Compilation message

railroad.cpp: In function 'Lint plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:69:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while( n < inc.size() ) n <<= 1;
              ^
railroad.cpp:74:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<inc.size();i++)
                  ^
railroad.cpp:80:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<de.size();i++) {
                  ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 37432 KB n = 2
2 Correct 0 ms 37432 KB n = 2
3 Correct 0 ms 37432 KB n = 2
4 Correct 0 ms 37432 KB n = 2
5 Correct 0 ms 37432 KB n = 2
6 Correct 0 ms 37432 KB n = 2
7 Correct 0 ms 37432 KB n = 3
8 Correct 0 ms 37432 KB n = 3
9 Correct 0 ms 37432 KB n = 3
10 Correct 0 ms 37432 KB n = 8
11 Correct 0 ms 37432 KB n = 8
12 Correct 0 ms 37432 KB n = 8
13 Correct 0 ms 37432 KB n = 8
14 Correct 0 ms 37432 KB n = 8
15 Correct 0 ms 37432 KB n = 8
16 Correct 0 ms 37432 KB n = 8
17 Correct 0 ms 37432 KB n = 8
18 Correct 0 ms 37432 KB n = 8
19 Correct 0 ms 37432 KB n = 3
20 Correct 0 ms 37432 KB n = 7
21 Correct 0 ms 37432 KB n = 8
22 Correct 0 ms 37432 KB n = 8
23 Correct 0 ms 37432 KB n = 8
24 Correct 0 ms 37432 KB n = 8
25 Correct 0 ms 37432 KB n = 8

Subtask #2
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 37432 KB n = 2
2 Correct 0 ms 37432 KB n = 2
3 Correct 0 ms 37432 KB n = 2
4 Correct 0 ms 37432 KB n = 2
5 Correct 0 ms 37432 KB n = 2
6 Correct 0 ms 37432 KB n = 2
7 Correct 0 ms 37432 KB n = 3
8 Correct 0 ms 37432 KB n = 3
9 Correct 0 ms 37432 KB n = 3
10 Correct 0 ms 37432 KB n = 8
11 Correct 0 ms 37432 KB n = 8
12 Correct 0 ms 37432 KB n = 8
13 Correct 0 ms 37432 KB n = 8
14 Correct 0 ms 37432 KB n = 8
15 Correct 0 ms 37432 KB n = 8
16 Correct 0 ms 37432 KB n = 8
17 Correct 0 ms 37432 KB n = 8
18 Correct 0 ms 37432 KB n = 8
19 Correct 0 ms 37432 KB n = 3
20 Correct 0 ms 37432 KB n = 7
21 Correct 0 ms 37432 KB n = 8
22 Correct 0 ms 37432 KB n = 8
23 Correct 0 ms 37432 KB n = 8
24 Correct 0 ms 37432 KB n = 8
25 Correct 0 ms 37432 KB n = 8
26 Correct 0 ms 37432 KB n = 8
27 Correct 0 ms 37432 KB n = 8
28 Correct 0 ms 37432 KB n = 8
29 Correct 129 ms 37432 KB n = 16
30 Correct 126 ms 37432 KB n = 16
31 Correct 113 ms 37432 KB n = 16
32 Correct 109 ms 37432 KB n = 16
33 Correct 113 ms 37432 KB n = 16
34 Correct 99 ms 37432 KB n = 16
35 Correct 106 ms 37432 KB n = 16
36 Correct 46 ms 37432 KB n = 15
37 Correct 0 ms 37432 KB n = 8
38 Correct 106 ms 37432 KB n = 16
39 Correct 103 ms 37432 KB n = 16
40 Correct 0 ms 37432 KB n = 9
41 Correct 106 ms 37432 KB n = 16
42 Correct 109 ms 37432 KB n = 16
43 Correct 106 ms 37432 KB n = 16
44 Correct 0 ms 37432 KB n = 9
45 Correct 43 ms 37432 KB n = 15
46 Correct 103 ms 37432 KB n = 16
47 Correct 113 ms 37432 KB n = 16
48 Correct 113 ms 37432 KB n = 16

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 45292 KB n = 199999
2 Correct 186 ms 44784 KB n = 199991
3 Correct 109 ms 45292 KB n = 199993
4 Correct 129 ms 43140 KB n = 152076
5 Incorrect 76 ms 40744 KB answer is not correct: 1 instead of 0
6 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 37432 KB n = 2
2 Correct 0 ms 37432 KB n = 2
3 Correct 0 ms 37432 KB n = 2
4 Correct 0 ms 37432 KB n = 2
5 Correct 0 ms 37432 KB n = 2
6 Correct 0 ms 37432 KB n = 2
7 Correct 0 ms 37432 KB n = 3
8 Correct 0 ms 37432 KB n = 3
9 Correct 0 ms 37432 KB n = 3
10 Correct 0 ms 37432 KB n = 8
11 Correct 0 ms 37432 KB n = 8
12 Correct 0 ms 37432 KB n = 8
13 Correct 0 ms 37432 KB n = 8
14 Correct 0 ms 37432 KB n = 8
15 Correct 0 ms 37432 KB n = 8
16 Correct 0 ms 37432 KB n = 8
17 Correct 0 ms 37432 KB n = 8
18 Correct 0 ms 37432 KB n = 8
19 Correct 0 ms 37432 KB n = 3
20 Correct 0 ms 37432 KB n = 7
21 Correct 0 ms 37432 KB n = 8
22 Correct 0 ms 37432 KB n = 8
23 Correct 0 ms 37432 KB n = 8
24 Correct 0 ms 37432 KB n = 8
25 Correct 0 ms 37432 KB n = 8
26 Correct 0 ms 37432 KB n = 8
27 Correct 0 ms 37432 KB n = 8
28 Correct 0 ms 37432 KB n = 8
29 Correct 129 ms 37432 KB n = 16
30 Correct 126 ms 37432 KB n = 16
31 Correct 113 ms 37432 KB n = 16
32 Correct 109 ms 37432 KB n = 16
33 Correct 113 ms 37432 KB n = 16
34 Correct 99 ms 37432 KB n = 16
35 Correct 106 ms 37432 KB n = 16
36 Correct 46 ms 37432 KB n = 15
37 Correct 0 ms 37432 KB n = 8
38 Correct 106 ms 37432 KB n = 16
39 Correct 103 ms 37432 KB n = 16
40 Correct 0 ms 37432 KB n = 9
41 Correct 106 ms 37432 KB n = 16
42 Correct 109 ms 37432 KB n = 16
43 Correct 106 ms 37432 KB n = 16
44 Correct 0 ms 37432 KB n = 9
45 Correct 43 ms 37432 KB n = 15
46 Correct 103 ms 37432 KB n = 16
47 Correct 113 ms 37432 KB n = 16
48 Correct 113 ms 37432 KB n = 16
49 Correct 96 ms 45292 KB n = 199999
50 Correct 186 ms 44784 KB n = 199991
51 Correct 109 ms 45292 KB n = 199993
52 Correct 129 ms 43140 KB n = 152076
53 Incorrect 76 ms 40744 KB answer is not correct: 1 instead of 0
54 Halted 0 ms 0 KB -