oj.uz

Submission #414702

# Submission time Handle Problem Language Result Execution time Memory
414702 2021-05-31T04:39:01 Z juggernaut The Xana coup (BOI21_xanadu) C++17
5 / 100
 267 ms 114632 KB 
#include<bits/stdc++.h>
#define fr first
#define sc second
using namespace std;
void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
typedef long long ll;
#define USING_ORDERED_SET 0
#if USING_ORDERED_SET
#include<bits/extc++.h>
using namespace __gnu_pbds;
template<class T>using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
#endif
template<class T>void umax(T &a,T b){if(a<b)a=b;}
template<class T>void umin(T &a,T b){if(b<a)a=b;}
#ifdef IOI2021SG
    #define printl(args...)printf(args)
#else
    #define printl(args...)((void)0)
#endif
int mp[2000000];
vector<int>g[100005];
int n;
int run(int mask){
    if(~mp[mask])return mp[mask];
    mp[mask]=2e9;
    for(int i=0;i<n;i++){
        int new_mask=mask;
        for(int to:g[i])new_mask^=(1<<to);
        umin(mp[mask],run(new_mask)+1);
    }
    return mp[mask];
}
int main(){
    memset(mp,-1,sizeof mp);
    scanf("%d",&n);
    for(int i=1;i<n;i++){
        int x,y;
        scanf("%d%d",&x,&y);
        x--;y--;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    int mask=0;
    for(int i=0;i<n;i++){
        int x;
        scanf("%d",&x);
        mask|=(x<<i);
        g[i].push_back(i);
    }
    mp[mask]=0;
    int x=run(0);
    if(x==int(2e9))puts("impossible");
    else printf("%d",x);
}

Compilation message

xanadu.cpp: In function 'void usaco(std::string)':
xanadu.cpp:5:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xanadu.cpp:5:66: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | void usaco(string s){freopen((s+".in").c_str(),"r",stdin);freopen((s+".out").c_str(),"w",stdout);}
      |                                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xanadu.cpp: In function 'int main()':
xanadu.cpp:35:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
xanadu.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~
xanadu.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         scanf("%d",&x);
      |         ~~~~~^~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 13516 KB Output is correct
2 Correct 8 ms 11200 KB Output is correct
3 Correct 132 ms 35160 KB Output is correct
4 Correct 267 ms 59692 KB Output is correct
5 Correct 115 ms 34968 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 13516 KB Output is correct
2 Correct 8 ms 11200 KB Output is correct
3 Correct 132 ms 35160 KB Output is correct
4 Correct 267 ms 59692 KB Output is correct
5 Correct 115 ms 34968 KB Output is correct
6 Correct 15 ms 13540 KB Output is correct
7 Correct 8 ms 11212 KB Output is correct
8 Correct 125 ms 34976 KB Output is correct
9 Correct 262 ms 59656 KB Output is correct
10 Correct 117 ms 35032 KB Output is correct
11 Runtime error 17 ms 20932 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 145 ms 114632 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 144 ms 114616 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 13516 KB Output is correct
2 Correct 8 ms 11200 KB Output is correct
3 Correct 132 ms 35160 KB Output is correct
4 Correct 267 ms 59692 KB Output is correct
5 Correct 115 ms 34968 KB Output is correct
6 Correct 15 ms 13540 KB Output is correct
7 Correct 8 ms 11212 KB Output is correct
8 Correct 125 ms 34976 KB Output is correct
9 Correct 262 ms 59656 KB Output is correct
10 Correct 117 ms 35032 KB Output is correct
11 Runtime error 17 ms 20932 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -