oj.uz

Submission #217887

# Submission time Handle Problem Language Result Execution time Memory
217887 2020-03-31T07:38:22 Z georgerapeanu Building 4 (JOI20_building4) C++11
100 / 100
 404 ms 45300 KB 
#include <cstdio>
#include <iostream>
#include <algorithm>

using namespace std;

int n;
pair<int,int> dp[1000005][2];
int v[1000005][2];

int main(){

    scanf("%d",&n);

    for(int h = 0;h < 2;h++){
        for(int i = 1;i <= 2 * n;i++){
            scanf("%d",&v[i][h]);
        }
    }

    dp[1][0] = {0,0};
    dp[1][1] = {1,1};

    for(int i = 2;i <= 2 * n;i++){
        for(int h = 0;h < 2;h++){
            dp[i][h] = {1e9,0};
            for(int h2 = 0;h2 < 2;h2++){
                if(v[i - 1][h2] <= v[i][h]){
                    dp[i][h].first = min(dp[i][h].first,dp[i - 1][h2].first + h);
                    dp[i][h].second = max(dp[i][h].second,dp[i - 1][h2].second + h);
                }
            }
        }
    }
    
    for(int h = 0;h < 2;h++){
        if(dp[n * 2][h].first <= n && n <= dp[n * 2][h].second){
            int x = 2 * n,y = n;
            string ans(2 * n,' ');
            while(x){
                ans[x - 1] = (h == 1) + 'A';
                y -= h;
                x--;
                if(v[x][0] <= v[x + 1][h] && dp[x][0].first <= y && y <= dp[x][0].second){
                    h = 0;
                }
                else{
                    h = 1;
                }
            }
            cout << ans << endl;;
            return 0;
        }
    }

    cout << -1 << endl;

    return 0;
}

Compilation message

building4.cpp: In function 'int main()':
building4.cpp:13:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
building4.cpp:17:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&v[i][h]);
             ~~~~~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 7 ms 512 KB Output is correct
7 Correct 6 ms 512 KB Output is correct
8 Correct 6 ms 512 KB Output is correct
9 Correct 6 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 6 ms 512 KB Output is correct
12 Correct 6 ms 512 KB Output is correct
13 Correct 7 ms 512 KB Output is correct
14 Correct 6 ms 512 KB Output is correct
15 Correct 6 ms 512 KB Output is correct
16 Correct 7 ms 460 KB Output is correct
17 Correct 6 ms 512 KB Output is correct
18 Correct 6 ms 512 KB Output is correct
19 Correct 6 ms 512 KB Output is correct
20 Correct 6 ms 512 KB Output is correct
21 Correct 6 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 512 KB Output is correct
24 Correct 6 ms 512 KB Output is correct
25 Correct 6 ms 512 KB Output is correct
26 Correct 6 ms 512 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 6 ms 512 KB Output is correct
29 Correct 6 ms 512 KB Output is correct
30 Correct 5 ms 512 KB Output is correct
31 Correct 6 ms 512 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 6 ms 512 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 7 ms 512 KB Output is correct
7 Correct 6 ms 512 KB Output is correct
8 Correct 6 ms 512 KB Output is correct
9 Correct 6 ms 512 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 6 ms 512 KB Output is correct
12 Correct 6 ms 512 KB Output is correct
13 Correct 7 ms 512 KB Output is correct
14 Correct 6 ms 512 KB Output is correct
15 Correct 6 ms 512 KB Output is correct
16 Correct 7 ms 460 KB Output is correct
17 Correct 6 ms 512 KB Output is correct
18 Correct 6 ms 512 KB Output is correct
19 Correct 6 ms 512 KB Output is correct
20 Correct 6 ms 512 KB Output is correct
21 Correct 6 ms 512 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 512 KB Output is correct
24 Correct 6 ms 512 KB Output is correct
25 Correct 6 ms 512 KB Output is correct
26 Correct 6 ms 512 KB Output is correct
27 Correct 6 ms 512 KB Output is correct
28 Correct 6 ms 512 KB Output is correct
29 Correct 6 ms 512 KB Output is correct
30 Correct 5 ms 512 KB Output is correct
31 Correct 6 ms 512 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 6 ms 512 KB Output is correct
34 Correct 398 ms 42360 KB Output is correct
35 Correct 363 ms 41976 KB Output is correct
36 Correct 347 ms 41208 KB Output is correct
37 Correct 366 ms 42104 KB Output is correct
38 Correct 319 ms 41976 KB Output is correct
39 Correct 311 ms 41208 KB Output is correct
40 Correct 350 ms 44536 KB Output is correct
41 Correct 285 ms 42232 KB Output is correct
42 Correct 365 ms 43768 KB Output is correct
43 Correct 379 ms 45176 KB Output is correct
44 Correct 391 ms 45176 KB Output is correct
45 Correct 404 ms 45176 KB Output is correct
46 Correct 372 ms 45172 KB Output is correct
47 Correct 346 ms 44280 KB Output is correct
48 Correct 334 ms 44024 KB Output is correct
49 Correct 345 ms 44996 KB Output is correct
50 Correct 380 ms 44408 KB Output is correct
51 Correct 382 ms 44276 KB Output is correct
52 Correct 275 ms 33424 KB Output is correct
53 Correct 262 ms 33424 KB Output is correct
54 Correct 220 ms 33404 KB Output is correct
55 Correct 240 ms 33272 KB Output is correct
56 Correct 333 ms 45300 KB Output is correct
57 Correct 287 ms 40184 KB Output is correct
58 Correct 281 ms 40312 KB Output is correct
59 Correct 294 ms 40304 KB Output is correct
60 Correct 282 ms 38392 KB Output is correct
61 Correct 291 ms 40824 KB Output is correct
62 Correct 285 ms 40184 KB Output is correct
63 Correct 292 ms 40916 KB Output is correct
64 Correct 279 ms 39416 KB Output is correct
65 Correct 298 ms 40824 KB Output is correct