oj.uz

Submission #832320

# Submission time Handle Problem Language Result Execution time Memory
832320 2023-08-21T08:55:27 Z TS_2392 Sailing Race (CEOI12_race) C++14
20 / 100
 1083 ms 5312 KB 
#include <bits/stdc++.h>
using namespace std;

#define fileIO(name) if(fopen(name".inp", "r")) {freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);}
#define SPEED {ios_base :: sync_with_stdio(0); cin.tie(0); cout.tie(0);}
template<class T1, class T2> bool minimize(T1 &a, T2 b){return a > b ? a = b, true : false;}
template<class T1, class T2> bool maximize(T1 &a, T2 b){return a < b ? a = b, true : false;}

const int N = 505   ;
int n, type, res, res_vtx, nxt[N], prv[N];
int adj[N][N], dp1[N][N][2], dp2[N][N][2];
int main(){
    fileIO("text");
    cin >> n >> type;
    for(int u = 1, v; u <= n; ++u){
        cin >> v;
		while(v){
			adj[u][v] = 1;
			cin >> v;
		}
        nxt[u] = u + 1; prv[u] = u - 1;
    }
    nxt[n] = 1; prv[1] = n;
    for(int len = 2; len < n; ++len){
        for(int i = 1; i <= n; ++i){
            int j = i + len - 1;
            if(j > n) j -= n;

            if(adj[i][j]) dp1[i][j][0] = 1;
            for(int k = nxt[i]; k != j; k = nxt[k]) if(adj[k][j] && dp1[i][k][0]){
                maximize(dp1[i][j][0], dp1[i][k][0] + 1);
            }

            if(adj[j][i]) dp1[i][j][1] = 1;
            for(int k = prv[j]; k != i; k = prv[k]) if(adj[k][i] && dp1[k][j][1]){
                maximize(dp1[i][j][1], dp1[k][j][1] + 1);
            }

        }
    }
    for(int len = 2; len < n; ++len){
        for(int i = 1; i <= n; ++i){
            int j = i + len - 1;
            if(j > n) j -= n;

            dp2[i][j][0] = dp2[i][prv[j]][0];
            if(adj[i][j]) maximize(dp2[i][j][0], dp2[nxt[i]][j][1] + 1);
            for(int k = nxt[i]; k != j; k = nxt[k]) if(adj[k][j] && dp1[i][k][0]){
                maximize(dp2[i][j][0], dp1[i][k][0] + dp2[k][j][0]);
            }

            dp2[i][j][1] = dp2[nxt[i]][j][1];
            if(adj[j][i]) maximize(dp2[i][j][1], dp2[i][prv[j]][0] + 1);
            for(int k = prv[j]; k != i; k = prv[k]) if(adj[k][i] && dp1[k][j][1]){
                maximize(dp2[i][j][1], dp1[k][j][1] + dp2[i][k][1]);
            }

            if(maximize(res, dp2[i][j][0])) res_vtx = i;
            if(maximize(res, dp2[i][j][1])) res_vtx = j;
        }
    }
    cout << res << '\n' << res_vtx;
    return 0;
}

Compilation message

race.cpp: In function 'int main()':
race.cpp:4:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define fileIO(name) if(fopen(name".inp", "r")) {freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);}
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
race.cpp:13:5: note: in expansion of macro 'fileIO'
   13 |     fileIO("text");
      |     ^~~~~~
race.cpp:4:90: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define fileIO(name) if(fopen(name".inp", "r")) {freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);}
      |                                                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
race.cpp:13:5: note: in expansion of macro 'fileIO'
   13 |     fileIO("text");
      |     ^~~~~~

Subtask #1
20.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 468 KB Output isn't correct
3 Incorrect 1 ms 596 KB Output isn't correct
4 Incorrect 1 ms 596 KB Output isn't correct
5 Correct 2 ms 724 KB Output is correct
6 Incorrect 3 ms 852 KB Output isn't correct
7 Incorrect 5 ms 980 KB Output isn't correct
8 Incorrect 5 ms 1100 KB Output isn't correct
9 Incorrect 10 ms 1108 KB Output isn't correct
10 Incorrect 7 ms 1236 KB Output isn't correct
11 Incorrect 15 ms 1288 KB Output isn't correct
12 Incorrect 64 ms 2264 KB Output isn't correct
13 Incorrect 172 ms 3256 KB Output isn't correct
14 Correct 367 ms 4196 KB Output is correct
15 Incorrect 873 ms 5176 KB Output isn't correct
16 Incorrect 971 ms 5188 KB Output isn't correct
17 Incorrect 868 ms 5180 KB Output isn't correct
18 Correct 682 ms 5232 KB Output is correct
19 Incorrect 1062 ms 5312 KB Output isn't correct
20 Incorrect 1083 ms 5240 KB Output isn't correct