oj.uz

Submission #211578

# Submission time Handle Problem Language Result Execution time Memory
211578 2020-03-20T17:38:22 Z LittleFlowers__ Building 4 (JOI20_building4) C++14
100 / 100
 299 ms 33928 KB 
#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r){return l+rng()%(r-l+1);}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0);
#define forinc(a,b,c) for(int a=b,_c=c;a<=_c;++a)
#define fordec(a,b,c) for(int a=b,_c=c;a>=_c;--a)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<int,int>
#define mt make_tuple
#define all(a) a.begin(),a.end()
#define reset(f, x) memset(f, x, sizeof(f))
#define bit(x,i) ((x>>(i-1))&1)
#define on(x,i) (x|(1ll<<(i-1)))
#define off(x,i) (x&~(1<<(i-1)))
#define gg exit(0);

const int N=1000010;

int n,nn;
int a[N][2];
int f[N][2],mx[N][2],mn[N][2];

main(){
    #define task "building4"
    //freopen(task".inp","r",stdin);
    //freopen(task".out","w",stdout);

    n=in; nn=n+n;
    forinc(j,0,1) forinc(i,1,nn) a[i][j]=in;
    reset(mn,127);
    mn[0][0]=mn[0][1]=0, f[0][0]=f[0][1]=1;
    forinc(i,0,nn) forinc(j,0,1) forinc(t,0,1) if(f[i][j]){
        if(a[i+1][t]>=a[i][j]){
            f[i+1][t]=1;
            mx[i+1][t]=max(mx[i+1][t],mx[i][j]+t);
            mn[i+1][t]=min(mn[i+1][t],mn[i][j]+t);
        }
    }

    forinc(j,0,1){
        if(f[nn][j] && mx[nn][j]>=n && n>=mn[nn][j]){
            string ans;
            int k=n;
            fordec(i,nn,1){
                ans+=(char)('A'+j); k-=j;
                forinc(t,0,1){
                    if(a[i][j]>=a[i-1][t] && f[i-1][t] && mx[i-1][t]>=k && k>=mn[i-1][t]){
                        j=t;
                        break;
                    }
                }
            }
            reverse(all(ans));
            cout<<ans;
            gg
        }
    }
    cout<<-1;
}

Compilation message

building4.cpp:28:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8192 KB Output is correct
2 Correct 10 ms 8192 KB Output is correct
3 Correct 12 ms 8192 KB Output is correct
4 Correct 10 ms 8168 KB Output is correct
5 Correct 10 ms 8192 KB Output is correct
6 Correct 11 ms 8320 KB Output is correct
7 Correct 12 ms 8320 KB Output is correct
8 Correct 10 ms 8192 KB Output is correct
9 Correct 11 ms 8320 KB Output is correct
10 Correct 11 ms 8320 KB Output is correct
11 Correct 10 ms 8320 KB Output is correct
12 Correct 11 ms 8240 KB Output is correct
13 Correct 11 ms 8320 KB Output is correct
14 Correct 10 ms 8320 KB Output is correct
15 Correct 13 ms 8320 KB Output is correct
16 Correct 11 ms 8308 KB Output is correct
17 Correct 10 ms 8320 KB Output is correct
18 Correct 11 ms 8320 KB Output is correct
19 Correct 10 ms 8296 KB Output is correct
20 Correct 9 ms 8368 KB Output is correct
21 Correct 11 ms 8320 KB Output is correct
22 Correct 10 ms 8320 KB Output is correct
23 Correct 9 ms 8320 KB Output is correct
24 Correct 12 ms 8240 KB Output is correct
25 Correct 11 ms 8320 KB Output is correct
26 Correct 12 ms 8320 KB Output is correct
27 Correct 9 ms 8320 KB Output is correct
28 Correct 9 ms 8192 KB Output is correct
29 Correct 9 ms 8320 KB Output is correct
30 Correct 9 ms 8320 KB Output is correct
31 Correct 12 ms 8320 KB Output is correct
32 Correct 11 ms 8296 KB Output is correct
33 Correct 10 ms 8320 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8192 KB Output is correct
2 Correct 10 ms 8192 KB Output is correct
3 Correct 12 ms 8192 KB Output is correct
4 Correct 10 ms 8168 KB Output is correct
5 Correct 10 ms 8192 KB Output is correct
6 Correct 11 ms 8320 KB Output is correct
7 Correct 12 ms 8320 KB Output is correct
8 Correct 10 ms 8192 KB Output is correct
9 Correct 11 ms 8320 KB Output is correct
10 Correct 11 ms 8320 KB Output is correct
11 Correct 10 ms 8320 KB Output is correct
12 Correct 11 ms 8240 KB Output is correct
13 Correct 11 ms 8320 KB Output is correct
14 Correct 10 ms 8320 KB Output is correct
15 Correct 13 ms 8320 KB Output is correct
16 Correct 11 ms 8308 KB Output is correct
17 Correct 10 ms 8320 KB Output is correct
18 Correct 11 ms 8320 KB Output is correct
19 Correct 10 ms 8296 KB Output is correct
20 Correct 9 ms 8368 KB Output is correct
21 Correct 11 ms 8320 KB Output is correct
22 Correct 10 ms 8320 KB Output is correct
23 Correct 9 ms 8320 KB Output is correct
24 Correct 12 ms 8240 KB Output is correct
25 Correct 11 ms 8320 KB Output is correct
26 Correct 12 ms 8320 KB Output is correct
27 Correct 9 ms 8320 KB Output is correct
28 Correct 9 ms 8192 KB Output is correct
29 Correct 9 ms 8320 KB Output is correct
30 Correct 9 ms 8320 KB Output is correct
31 Correct 12 ms 8320 KB Output is correct
32 Correct 11 ms 8296 KB Output is correct
33 Correct 10 ms 8320 KB Output is correct
34 Correct 251 ms 15844 KB Output is correct
35 Correct 268 ms 31928 KB Output is correct
36 Correct 265 ms 31536 KB Output is correct
37 Correct 272 ms 32048 KB Output is correct
38 Correct 268 ms 32068 KB Output is correct
39 Correct 249 ms 32068 KB Output is correct
40 Correct 286 ms 33616 KB Output is correct
41 Correct 259 ms 32580 KB Output is correct
42 Correct 284 ms 32976 KB Output is correct
43 Correct 285 ms 33752 KB Output is correct
44 Correct 299 ms 33816 KB Output is correct
45 Correct 286 ms 33812 KB Output is correct
46 Correct 276 ms 33780 KB Output is correct
47 Correct 274 ms 33868 KB Output is correct
48 Correct 263 ms 33784 KB Output is correct
49 Correct 292 ms 33828 KB Output is correct
50 Correct 288 ms 33760 KB Output is correct
51 Correct 293 ms 33772 KB Output is correct
52 Correct 136 ms 33748 KB Output is correct
53 Correct 146 ms 33732 KB Output is correct
54 Correct 129 ms 33824 KB Output is correct
55 Correct 143 ms 33724 KB Output is correct
56 Correct 287 ms 33784 KB Output is correct
57 Correct 218 ms 33620 KB Output is correct
58 Correct 225 ms 33752 KB Output is correct
59 Correct 260 ms 33928 KB Output is correct
60 Correct 214 ms 32360 KB Output is correct
61 Correct 230 ms 33784 KB Output is correct
62 Correct 226 ms 33416 KB Output is correct
63 Correct 233 ms 33780 KB Output is correct
64 Correct 214 ms 32952 KB Output is correct
65 Correct 228 ms 33780 KB Output is correct