oj.uz

Submission #832319

# Submission time Handle Problem Language Result Execution time Memory
832319 2023-08-21T08:54:44 Z TS_2392 Sailing Race (CEOI12_race) C++14
20 / 100
 1067 ms 5316 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 2 ms 704 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 980 KB Output isn't correct
9 Incorrect 10 ms 1204 KB Output isn't correct
10 Incorrect 8 ms 1236 KB Output isn't correct
11 Incorrect 17 ms 1236 KB Output isn't correct
12 Incorrect 63 ms 2252 KB Output isn't correct
13 Incorrect 170 ms 3220 KB Output isn't correct
14 Correct 371 ms 4244 KB Output is correct
15 Incorrect 885 ms 5236 KB Output isn't correct
16 Incorrect 980 ms 5232 KB Output isn't correct
17 Incorrect 909 ms 5236 KB Output isn't correct
18 Correct 654 ms 5236 KB Output is correct
19 Incorrect 1067 ms 5316 KB Output isn't correct
20 Incorrect 1060 ms 5232 KB Output isn't correct