oj.uz

Submission #1022737

# Submission time Handle Problem Language Result Execution time Memory
1022737 2024-07-14T04:16:59 Z guagua0407 Tug of War (BOI15_tug) C++17
100 / 100
 904 ms 6224 KB 
//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=6e4+5;
int l[mxn],r[mxn],S[mxn];
bool vis[mxn];

int main() {_
    int n,k;
    cin>>n>>k;
    vector<vector<int>> ls(n),rs(n);
    int all=0;
    for(int i=0;i<2*n;i++){
        cin>>l[i]>>r[i]>>S[i];
        all+=S[i];
        l[i]--;
        r[i]--;
        ls[l[i]].push_back(i);
        rs[r[i]].push_back(i);
    }
    for(int i=0;i<n;i++){
        if(ls[i].empty() or rs[i].empty()){
            cout<<"NO"<<'\n';
            return 0;
        }
    }
    int ans=0;
    for(int i=0;i<2*n;i++){
        if(vis[i]) continue;
        int state=-1;
        {
            int cnt=0;
            for(auto v:ls[l[i]]){
                if(!vis[v]) cnt++;
            }
            if(cnt==1){
                state=0;
            }
        }
        {
            int cnt=0;
            for(auto v:rs[r[i]]){
                if(!vis[v]) cnt++;
            }
            if(cnt==1){
                state=1;
            }
        }
        if(state==-1) continue;
        int x=i;
        while(x!=-1){
            vis[x]=true;
            int cnt=0;
            int nxt;
            if(state==0){
                state=1;
                ans+=S[x];
                for(auto v:rs[r[x]]){
                    if(!vis[v]){
                        cnt++;
                        nxt=v;
                    }
                }
                if(cnt==1) x=nxt;
                else x=-1;
            }
            else{
                state=0;
                for(auto v:ls[l[x]]){
                    if(!vis[v]){
                        cnt++;
                        nxt=v;
                    }
                }
                if(cnt==1) x=nxt;
                else x=-1;
            }
        }
    }
    /*for(int i=0;i<n;i++){
        {
            int cnt=0;
            for(auto v:ls[i]){
                if(!vis[v]) cnt++;
            }
            if(cnt!=2){
                cout<<"NO"<<'\n';
                return 0;
            }
        }
        {
            int cnt=0;
            for(auto v:rs[i]){
                if(!vis[v]) cnt++;
            }
            if(cnt!=2){
                cout<<"NO"<<'\n';
                return 0;
            }
        }
    }*/
    vector<int> cand;
    for(int i=0;i<2*n;i++){
        if(vis[i]) continue;
        int x=i;
        int a=0;
        int b=0;
        int state=0;
        while(x!=-1){
            vis[x]=true;
            if(state==0){
                state=1;
                a+=S[x];
                bool tf=false;
                for(auto v:ls[l[x]]){
                    if(!vis[v]){
                        x=v;
                        tf=true;
                        break;
                    }
                }
                if(!tf) x=-1;
            }
            else{
                state=0;
                b+=S[x];
                bool tf=false;
                for(auto v:rs[r[x]]){
                    if(!vis[v]){
                        x=v;
                        tf=true;
                        break;
                    }
                }
                if(!tf) x=-1;
            }
        }
        ans+=a;
        cand.push_back(b-a);
    }
    bitset<mxn*20> b;
    b[ans]=1;
    for(auto v:cand){
        if(v>=0) b|=(b<<v);
        else b|=(b>>(-v));
    }
    int cur=all/2;
    while((all-cur)-cur<=k){
        if(b[cur] or b[all-cur]){
            cout<<"YES"<<'\n';
            return 0;
        }
        cur--;
    }
    cout<<"NO"<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message

tug.cpp: In function 'void setIO(std::string)':
tug.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tug.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tug.cpp: In function 'int main()':
tug.cpp:67:19: warning: 'nxt' may be used uninitialized in this function [-Wmaybe-uninitialized]
   67 |             vis[x]=true;
      |             ~~~~~~^~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 2 ms 860 KB Output is correct
3 Correct 2 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 852 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 1 ms 860 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 0 ms 860 KB Output is correct
22 Correct 1 ms 1112 KB Output is correct
23 Correct 1 ms 856 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 860 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 2 ms 860 KB Output is correct
3 Correct 2 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 852 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 1 ms 860 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 0 ms 860 KB Output is correct
22 Correct 1 ms 1112 KB Output is correct
23 Correct 1 ms 856 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 67 ms 1112 KB Output is correct
27 Correct 9 ms 1112 KB Output is correct
28 Correct 53 ms 1112 KB Output is correct
29 Correct 9 ms 1112 KB Output is correct
30 Correct 54 ms 1116 KB Output is correct
31 Correct 9 ms 1116 KB Output is correct
32 Correct 53 ms 1116 KB Output is correct
33 Correct 9 ms 1120 KB Output is correct
34 Correct 5 ms 1120 KB Output is correct
35 Correct 9 ms 1112 KB Output is correct
36 Correct 53 ms 1116 KB Output is correct
37 Correct 9 ms 1112 KB Output is correct
38 Correct 53 ms 1116 KB Output is correct
39 Correct 9 ms 1112 KB Output is correct
40 Correct 53 ms 1116 KB Output is correct
41 Correct 9 ms 1116 KB Output is correct
42 Correct 54 ms 1116 KB Output is correct
43 Correct 9 ms 1116 KB Output is correct
44 Correct 53 ms 1116 KB Output is correct
45 Correct 9 ms 1116 KB Output is correct
46 Correct 53 ms 1116 KB Output is correct
47 Correct 1 ms 1116 KB Output is correct
48 Correct 27 ms 1116 KB Output is correct
49 Correct 28 ms 1116 KB Output is correct
50 Correct 54 ms 1112 KB Output is correct
51 Correct 55 ms 1116 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 2392 KB Output is correct
2 Correct 9 ms 2396 KB Output is correct
3 Correct 163 ms 2576 KB Output is correct
4 Correct 6 ms 2392 KB Output is correct
5 Correct 148 ms 2552 KB Output is correct
6 Correct 5 ms 2392 KB Output is correct
7 Correct 149 ms 2396 KB Output is correct
8 Correct 5 ms 2396 KB Output is correct
9 Correct 144 ms 2572 KB Output is correct
10 Correct 5 ms 2396 KB Output is correct
11 Correct 162 ms 2376 KB Output is correct
12 Correct 8 ms 2280 KB Output is correct
13 Correct 152 ms 2496 KB Output is correct
14 Correct 182 ms 2392 KB Output is correct
15 Correct 5 ms 2392 KB Output is correct
16 Correct 143 ms 2396 KB Output is correct
17 Correct 5 ms 2396 KB Output is correct
18 Correct 153 ms 2572 KB Output is correct
19 Correct 6 ms 2396 KB Output is correct
20 Correct 163 ms 2396 KB Output is correct
21 Correct 7 ms 2392 KB Output is correct
22 Correct 78 ms 2396 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 856 KB Output is correct
2 Correct 2 ms 860 KB Output is correct
3 Correct 2 ms 860 KB Output is correct
4 Correct 1 ms 860 KB Output is correct
5 Correct 1 ms 860 KB Output is correct
6 Correct 1 ms 860 KB Output is correct
7 Correct 1 ms 860 KB Output is correct
8 Correct 1 ms 856 KB Output is correct
9 Correct 1 ms 860 KB Output is correct
10 Correct 1 ms 860 KB Output is correct
11 Correct 1 ms 860 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 860 KB Output is correct
16 Correct 1 ms 860 KB Output is correct
17 Correct 1 ms 852 KB Output is correct
18 Correct 1 ms 856 KB Output is correct
19 Correct 1 ms 860 KB Output is correct
20 Correct 1 ms 860 KB Output is correct
21 Correct 0 ms 860 KB Output is correct
22 Correct 1 ms 1112 KB Output is correct
23 Correct 1 ms 856 KB Output is correct
24 Correct 1 ms 860 KB Output is correct
25 Correct 1 ms 860 KB Output is correct
26 Correct 67 ms 1112 KB Output is correct
27 Correct 9 ms 1112 KB Output is correct
28 Correct 53 ms 1112 KB Output is correct
29 Correct 9 ms 1112 KB Output is correct
30 Correct 54 ms 1116 KB Output is correct
31 Correct 9 ms 1116 KB Output is correct
32 Correct 53 ms 1116 KB Output is correct
33 Correct 9 ms 1120 KB Output is correct
34 Correct 5 ms 1120 KB Output is correct
35 Correct 9 ms 1112 KB Output is correct
36 Correct 53 ms 1116 KB Output is correct
37 Correct 9 ms 1112 KB Output is correct
38 Correct 53 ms 1116 KB Output is correct
39 Correct 9 ms 1112 KB Output is correct
40 Correct 53 ms 1116 KB Output is correct
41 Correct 9 ms 1116 KB Output is correct
42 Correct 54 ms 1116 KB Output is correct
43 Correct 9 ms 1116 KB Output is correct
44 Correct 53 ms 1116 KB Output is correct
45 Correct 9 ms 1116 KB Output is correct
46 Correct 53 ms 1116 KB Output is correct
47 Correct 1 ms 1116 KB Output is correct
48 Correct 27 ms 1116 KB Output is correct
49 Correct 28 ms 1116 KB Output is correct
50 Correct 54 ms 1112 KB Output is correct
51 Correct 55 ms 1116 KB Output is correct
52 Correct 146 ms 2392 KB Output is correct
53 Correct 9 ms 2396 KB Output is correct
54 Correct 163 ms 2576 KB Output is correct
55 Correct 6 ms 2392 KB Output is correct
56 Correct 148 ms 2552 KB Output is correct
57 Correct 5 ms 2392 KB Output is correct
58 Correct 149 ms 2396 KB Output is correct
59 Correct 5 ms 2396 KB Output is correct
60 Correct 144 ms 2572 KB Output is correct
61 Correct 5 ms 2396 KB Output is correct
62 Correct 162 ms 2376 KB Output is correct
63 Correct 8 ms 2280 KB Output is correct
64 Correct 152 ms 2496 KB Output is correct
65 Correct 182 ms 2392 KB Output is correct
66 Correct 5 ms 2392 KB Output is correct
67 Correct 143 ms 2396 KB Output is correct
68 Correct 5 ms 2396 KB Output is correct
69 Correct 153 ms 2572 KB Output is correct
70 Correct 6 ms 2396 KB Output is correct
71 Correct 163 ms 2396 KB Output is correct
72 Correct 7 ms 2392 KB Output is correct
73 Correct 78 ms 2396 KB Output is correct
74 Correct 818 ms 5968 KB Output is correct
75 Correct 52 ms 5716 KB Output is correct
76 Correct 798 ms 6016 KB Output is correct
77 Correct 47 ms 5688 KB Output is correct
78 Correct 780 ms 5980 KB Output is correct
79 Correct 783 ms 6008 KB Output is correct
80 Correct 50 ms 5716 KB Output is correct
81 Correct 47 ms 5720 KB Output is correct
82 Correct 828 ms 5992 KB Output is correct
83 Correct 790 ms 5992 KB Output is correct
84 Correct 52 ms 5724 KB Output is correct
85 Correct 904 ms 6008 KB Output is correct
86 Correct 47 ms 5764 KB Output is correct
87 Correct 821 ms 5980 KB Output is correct
88 Correct 55 ms 5712 KB Output is correct
89 Correct 845 ms 6000 KB Output is correct
90 Correct 62 ms 5720 KB Output is correct
91 Correct 803 ms 5968 KB Output is correct
92 Correct 56 ms 5724 KB Output is correct
93 Correct 841 ms 5968 KB Output is correct
94 Correct 14 ms 5468 KB Output is correct
95 Correct 485 ms 5868 KB Output is correct
96 Correct 412 ms 5720 KB Output is correct
97 Correct 878 ms 6224 KB Output is correct
98 Correct 835 ms 5996 KB Output is correct