oj.uz

답안 #805222

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
805222 2023-08-03T14:12:46 Z YassirSalama 꿈 (IOI13_dreaming) C++17
47 / 100
 742 ms 18584 KB 
#include "dreaming.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define all(v) v.begin(),v.end()
#define OVL(x,s) for(auto y:x) cout<<y<<s; cout<<"\n";
void dbg_out() { cout << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cout << ' ' << H; dbg_out(T...); }
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__);
#define pb push_back
#define F first
#define S second
const ll INF=1e18;
const int MAXN=1e5+100;
int n,m,l;
vector<vector<pair<int,int>>> v(MAXN);
vector<pair<ll,ll>> diameters;
bool visited[MAXN];
ll parr[MAXN];
ll depth[MAXN];
pair<ll,ll> dfs(int node,int par,ll ew=0){//depth, best node
    visited[node]=true;
    parr[node]=par;
    depth[node]=ew;
    if(v[node].size()==1&&v[node][0].F==par){
        return {ew,node};
    }
    ll ans=0;
    ll best=node;
    for(auto x:v[node]){
        if(x.F!=par){
            pair<ll,ll> p=dfs(x.F,node,ew+x.S);
            if(p.F>ans){
                ans=p.F;
                best=p.S;
            }
        }
    }
    return {ans,best};
}
ll bigdia=0;
int par[MAXN];
void find_diameter(int node){
    pair<ll,ll> p=dfs(node,node);
    int f=p.S;
    memset(parr,-1,sizeof(parr));
    p=dfs(p.S,p.S);
    // dbg(f,p.S);
    vector<ll> dia;
    while(p.S!=parr[p.S]) {
        dia.push_back(p.S);
        p.S=parr[p.S];
    }
    dia.push_back(p.S);
    reverse(all(dia));
    bigdia=p.F;
    int nodea=-1;
    int nodeb=-1;
    int a,b,c,e;
    ll besta=INF;
    ll bestb=INF;
    for(auto x:dia){
        a=depth[dia.back()]-depth[x];
        b=depth[x];
        if(besta>=max(a,b)){
            besta=max(a,b);
            nodea=x;
        }
        par[x]=dia[0];
    }
    diameters.pb({besta,nodea});

}
struct Edge{
    ll a,b;
    ll c;
    bool operator < (const Edge& other) const{
        return c<other.c;
    }
};
int find(int node){
    if(node==par[node]) return node;
    return par[node]=find(par[node]);
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    n=N;
    m=M;
    l=L;
    memset(visited,false,sizeof(visited));
    for(int i=0;i<m;i++){
        v[A[i]].push_back({B[i],T[i]});
        v[B[i]].push_back({A[i],T[i]});
    }
    memset(depth,0,sizeof(depth));
    for(int i=0;i<n;i++){
        if(!visited[i]){
            find_diameter(i);
        }
    }
    vector<Edge> edges;
    int d=diameters.size();
    for(int i=0;i+1<d;i++){
        int nodea=diameters[i].S;
        int nodeb=diameters[i+1].S;
        int a,b,c,e;
        ll besta=diameters[i].F;
        ll bestb=diameters[i+1].F;
        edges.push_back({.a=nodea,.b=nodeb,.c=besta+l+bestb});
    }
    sort(all(edges));
    for(auto& edge:edges){
        if(find(edge.a)==find(edge.b)) continue;
        int a=find(edge.a);
        int b=find(edge.b);
        par[b]=a;
        // dbg(edge.a,edge.b,edge.c);
        // dbg(a,b,edge.a,edge.b);
        v[edge.a].pb({edge.b,l});
        v[edge.b].pb({edge.a,l});
    }
    memset(depth,0LL,sizeof(depth));
    find_diameter(0);
    return bigdia;
}

#ifdef IOI

#define fail(s, x...) do { \
        fprintf(stderr, s "\n", ## x); \
        exit(1); \
    } while(0)

#define MAX_N 100000

static int A[MAX_N];
static int B[MAX_N];
static int T[MAX_N];

int main() {
    int N, M, L, i;
    int res;

    FILE *f = fopen("dreaming.in", "r");
    if (!f)
        fail("Failed to open input file.");

    res = fscanf(f, "%d%d%d", &N, &M, &L);
    for (i = 0; i < M; i++)
        res = fscanf(f, "%d%d%d", &A[i], &B[i], &T[i]);
    fclose(f);

    int answer = travelTime(N, M, L, A, B, T);
    printf("%d\n", answer);

    return 0;
}

#endif

Compilation message

dreaming.cpp: In function 'void find_diameter(int)':
dreaming.cpp:45:9: warning: unused variable 'f' [-Wunused-variable]
   45 |     int f=p.S;
      |         ^
dreaming.cpp:58:9: warning: unused variable 'nodeb' [-Wunused-variable]
   58 |     int nodeb=-1;
      |         ^~~~~
dreaming.cpp:59:13: warning: unused variable 'c' [-Wunused-variable]
   59 |     int a,b,c,e;
      |             ^
dreaming.cpp:59:15: warning: unused variable 'e' [-Wunused-variable]
   59 |     int a,b,c,e;
      |               ^
dreaming.cpp:61:8: warning: unused variable 'bestb' [-Wunused-variable]
   61 |     ll bestb=INF;
      |        ^~~~~
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:105:13: warning: unused variable 'a' [-Wunused-variable]
  105 |         int a,b,c,e;
      |             ^
dreaming.cpp:105:15: warning: unused variable 'b' [-Wunused-variable]
  105 |         int a,b,c,e;
      |               ^
dreaming.cpp:105:17: warning: unused variable 'c' [-Wunused-variable]
  105 |         int a,b,c,e;
      |                 ^
dreaming.cpp:105:19: warning: unused variable 'e' [-Wunused-variable]
  105 |         int a,b,c,e;
      |                   ^

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 17404 KB Output is correct
2 Correct 40 ms 17436 KB Output is correct
3 Correct 30 ms 12744 KB Output is correct
4 Correct 9 ms 6248 KB Output is correct
5 Correct 6 ms 5180 KB Output is correct
6 Correct 11 ms 7236 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 20 ms 8448 KB Output is correct
9 Correct 25 ms 10196 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12216 KB Output is correct
12 Correct 43 ms 14312 KB Output is correct
13 Correct 2 ms 4436 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 2 ms 4308 KB Output is correct
6 Correct 2 ms 4308 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 2 ms 4308 KB Output is correct
9 Correct 2 ms 4308 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 3 ms 4308 KB Output is correct
12 Correct 2 ms 4308 KB Output is correct
13 Correct 2 ms 4308 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4308 KB Output is correct
16 Correct 2 ms 4308 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4308 KB Output is correct
21 Correct 2 ms 4308 KB Output is correct
22 Correct 2 ms 4308 KB Output is correct
23 Correct 2 ms 4308 KB Output is correct
24 Correct 2 ms 4308 KB Output is correct
25 Correct 3 ms 4308 KB Output is correct

Subtask #3
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 17404 KB Output is correct
2 Correct 40 ms 17436 KB Output is correct
3 Correct 30 ms 12744 KB Output is correct
4 Correct 9 ms 6248 KB Output is correct
5 Correct 6 ms 5180 KB Output is correct
6 Correct 11 ms 7236 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 20 ms 8448 KB Output is correct
9 Correct 25 ms 10196 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12216 KB Output is correct
12 Correct 43 ms 14312 KB Output is correct
13 Correct 2 ms 4436 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4308 KB Output is correct
16 Correct 2 ms 4308 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4308 KB Output is correct
21 Correct 2 ms 4308 KB Output is correct
22 Correct 2 ms 4308 KB Output is correct
23 Correct 2 ms 4308 KB Output is correct
24 Correct 3 ms 4308 KB Output is correct
25 Correct 2 ms 4308 KB Output is correct
26 Correct 2 ms 4308 KB Output is correct
27 Correct 2 ms 4308 KB Output is correct
28 Correct 2 ms 4308 KB Output is correct
29 Correct 2 ms 4308 KB Output is correct
30 Correct 2 ms 4308 KB Output is correct
31 Correct 2 ms 4308 KB Output is correct
32 Correct 2 ms 4308 KB Output is correct
33 Correct 2 ms 4308 KB Output is correct
34 Correct 2 ms 4308 KB Output is correct
35 Correct 2 ms 4308 KB Output is correct
36 Correct 2 ms 4308 KB Output is correct
37 Correct 2 ms 4308 KB Output is correct
38 Correct 3 ms 4308 KB Output is correct
39 Correct 44 ms 17408 KB Output is correct
40 Correct 39 ms 17376 KB Output is correct
41 Correct 26 ms 12712 KB Output is correct
42 Correct 10 ms 6248 KB Output is correct
43 Correct 2 ms 4308 KB Output is correct
44 Correct 2 ms 4308 KB Output is correct
45 Correct 2 ms 4308 KB Output is correct
46 Correct 2 ms 4308 KB Output is correct
47 Correct 3 ms 4308 KB Output is correct
48 Correct 2 ms 4308 KB Output is correct
49 Correct 2 ms 4308 KB Output is correct
50 Correct 2 ms 4308 KB Output is correct
51 Correct 2 ms 4308 KB Output is correct
52 Correct 2 ms 4308 KB Output is correct
53 Correct 2 ms 4308 KB Output is correct
54 Correct 2 ms 4308 KB Output is correct
55 Correct 2 ms 4308 KB Output is correct
56 Correct 2 ms 4308 KB Output is correct
57 Correct 42 ms 9744 KB Output is correct
58 Correct 45 ms 9724 KB Output is correct
59 Correct 45 ms 9832 KB Output is correct
60 Correct 61 ms 9828 KB Output is correct
61 Correct 44 ms 9644 KB Output is correct
62 Correct 42 ms 9676 KB Output is correct
63 Correct 43 ms 9280 KB Output is correct
64 Correct 43 ms 9240 KB Output is correct
65 Correct 45 ms 9332 KB Output is correct
66 Correct 44 ms 9344 KB Output is correct
67 Correct 56 ms 9832 KB Output is correct
68 Correct 46 ms 9824 KB Output is correct
69 Correct 46 ms 9792 KB Output is correct
70 Correct 63 ms 9860 KB Output is correct
71 Correct 2 ms 4308 KB Output is correct
72 Correct 3 ms 4436 KB Output is correct
73 Correct 3 ms 4436 KB Output is correct
74 Correct 3 ms 4436 KB Output is correct
75 Correct 3 ms 4436 KB Output is correct
76 Correct 3 ms 4436 KB Output is correct
77 Correct 3 ms 4436 KB Output is correct
78 Correct 3 ms 4388 KB Output is correct
79 Correct 3 ms 4436 KB Output is correct
80 Correct 44 ms 9728 KB Output is correct
81 Correct 48 ms 9796 KB Output is correct
82 Correct 42 ms 9640 KB Output is correct
83 Correct 43 ms 9676 KB Output is correct
84 Correct 2 ms 4436 KB Output is correct
85 Correct 3 ms 4468 KB Output is correct
86 Correct 2 ms 4436 KB Output is correct
87 Correct 3 ms 4436 KB Output is correct
88 Correct 3 ms 4436 KB Output is correct
89 Correct 3 ms 4436 KB Output is correct
90 Correct 3 ms 4436 KB Output is correct
91 Correct 4 ms 4436 KB Output is correct
92 Correct 4 ms 4436 KB Output is correct
93 Correct 4 ms 4388 KB Output is correct
94 Correct 2 ms 4308 KB Output is correct
95 Correct 2 ms 4308 KB Output is correct
96 Correct 2 ms 4308 KB Output is correct
97 Correct 2 ms 4240 KB Output is correct
98 Correct 2 ms 4308 KB Output is correct
99 Correct 2 ms 4308 KB Output is correct
100 Correct 2 ms 4308 KB Output is correct
101 Correct 2 ms 4308 KB Output is correct
102 Correct 2 ms 4308 KB Output is correct
103 Correct 2 ms 4308 KB Output is correct
104 Correct 6 ms 5204 KB Output is correct
105 Correct 11 ms 7228 KB Output is correct
106 Correct 2 ms 4308 KB Output is correct
107 Correct 20 ms 8408 KB Output is correct
108 Correct 25 ms 10196 KB Output is correct
109 Correct 2 ms 4416 KB Output is correct
110 Correct 36 ms 12140 KB Output is correct
111 Correct 41 ms 14224 KB Output is correct
112 Correct 2 ms 4436 KB Output is correct
113 Correct 63 ms 18584 KB Output is correct

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 742 ms 17316 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Correct 2 ms 4308 KB Output is correct
4 Correct 2 ms 4308 KB Output is correct
5 Correct 2 ms 4308 KB Output is correct
6 Correct 2 ms 4308 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 2 ms 4308 KB Output is correct
9 Correct 2 ms 4308 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 3 ms 4308 KB Output is correct
12 Correct 2 ms 4308 KB Output is correct
13 Correct 2 ms 4308 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4308 KB Output is correct
16 Correct 2 ms 4308 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4308 KB Output is correct
21 Correct 2 ms 4308 KB Output is correct
22 Correct 2 ms 4308 KB Output is correct
23 Correct 2 ms 4308 KB Output is correct
24 Correct 2 ms 4308 KB Output is correct
25 Correct 3 ms 4308 KB Output is correct
26 Incorrect 4 ms 4308 KB Output isn't correct
27 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 17404 KB Output is correct
2 Correct 40 ms 17436 KB Output is correct
3 Correct 30 ms 12744 KB Output is correct
4 Correct 9 ms 6248 KB Output is correct
5 Correct 6 ms 5180 KB Output is correct
6 Correct 11 ms 7236 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 20 ms 8448 KB Output is correct
9 Correct 25 ms 10196 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12216 KB Output is correct
12 Correct 43 ms 14312 KB Output is correct
13 Correct 2 ms 4436 KB Output is correct
14 Correct 2 ms 4308 KB Output is correct
15 Correct 2 ms 4308 KB Output is correct
16 Correct 2 ms 4308 KB Output is correct
17 Correct 2 ms 4308 KB Output is correct
18 Correct 2 ms 4308 KB Output is correct
19 Correct 2 ms 4308 KB Output is correct
20 Correct 2 ms 4308 KB Output is correct
21 Correct 2 ms 4308 KB Output is correct
22 Correct 2 ms 4308 KB Output is correct
23 Correct 2 ms 4308 KB Output is correct
24 Correct 3 ms 4308 KB Output is correct
25 Correct 2 ms 4308 KB Output is correct
26 Correct 2 ms 4308 KB Output is correct
27 Correct 2 ms 4308 KB Output is correct
28 Correct 2 ms 4308 KB Output is correct
29 Correct 2 ms 4308 KB Output is correct
30 Correct 2 ms 4308 KB Output is correct
31 Correct 2 ms 4308 KB Output is correct
32 Correct 2 ms 4308 KB Output is correct
33 Correct 2 ms 4308 KB Output is correct
34 Correct 2 ms 4308 KB Output is correct
35 Correct 2 ms 4308 KB Output is correct
36 Correct 2 ms 4308 KB Output is correct
37 Correct 2 ms 4308 KB Output is correct
38 Correct 3 ms 4308 KB Output is correct
39 Correct 44 ms 17408 KB Output is correct
40 Correct 39 ms 17376 KB Output is correct
41 Correct 26 ms 12712 KB Output is correct
42 Correct 10 ms 6248 KB Output is correct
43 Correct 2 ms 4308 KB Output is correct
44 Correct 2 ms 4308 KB Output is correct
45 Correct 2 ms 4308 KB Output is correct
46 Correct 2 ms 4308 KB Output is correct
47 Correct 3 ms 4308 KB Output is correct
48 Correct 2 ms 4308 KB Output is correct
49 Correct 2 ms 4308 KB Output is correct
50 Correct 2 ms 4308 KB Output is correct
51 Correct 2 ms 4308 KB Output is correct
52 Correct 2 ms 4308 KB Output is correct
53 Correct 2 ms 4308 KB Output is correct
54 Correct 2 ms 4308 KB Output is correct
55 Correct 2 ms 4308 KB Output is correct
56 Correct 2 ms 4308 KB Output is correct
57 Correct 42 ms 9744 KB Output is correct
58 Correct 45 ms 9724 KB Output is correct
59 Correct 45 ms 9832 KB Output is correct
60 Correct 61 ms 9828 KB Output is correct
61 Correct 44 ms 9644 KB Output is correct
62 Correct 42 ms 9676 KB Output is correct
63 Correct 43 ms 9280 KB Output is correct
64 Correct 43 ms 9240 KB Output is correct
65 Correct 45 ms 9332 KB Output is correct
66 Correct 44 ms 9344 KB Output is correct
67 Correct 56 ms 9832 KB Output is correct
68 Correct 46 ms 9824 KB Output is correct
69 Correct 46 ms 9792 KB Output is correct
70 Correct 63 ms 9860 KB Output is correct
71 Correct 2 ms 4308 KB Output is correct
72 Correct 3 ms 4436 KB Output is correct
73 Correct 3 ms 4436 KB Output is correct
74 Correct 3 ms 4436 KB Output is correct
75 Correct 3 ms 4436 KB Output is correct
76 Correct 3 ms 4436 KB Output is correct
77 Correct 3 ms 4436 KB Output is correct
78 Correct 3 ms 4388 KB Output is correct
79 Correct 3 ms 4436 KB Output is correct
80 Correct 44 ms 9728 KB Output is correct
81 Correct 48 ms 9796 KB Output is correct
82 Correct 42 ms 9640 KB Output is correct
83 Correct 43 ms 9676 KB Output is correct
84 Correct 2 ms 4436 KB Output is correct
85 Correct 3 ms 4468 KB Output is correct
86 Correct 2 ms 4436 KB Output is correct
87 Correct 3 ms 4436 KB Output is correct
88 Correct 3 ms 4436 KB Output is correct
89 Correct 3 ms 4436 KB Output is correct
90 Correct 3 ms 4436 KB Output is correct
91 Correct 4 ms 4436 KB Output is correct
92 Correct 4 ms 4436 KB Output is correct
93 Correct 4 ms 4388 KB Output is correct
94 Correct 2 ms 4308 KB Output is correct
95 Correct 2 ms 4308 KB Output is correct
96 Correct 2 ms 4308 KB Output is correct
97 Correct 2 ms 4240 KB Output is correct
98 Correct 2 ms 4308 KB Output is correct
99 Correct 2 ms 4308 KB Output is correct
100 Correct 2 ms 4308 KB Output is correct
101 Correct 2 ms 4308 KB Output is correct
102 Correct 2 ms 4308 KB Output is correct
103 Correct 2 ms 4308 KB Output is correct
104 Correct 6 ms 5204 KB Output is correct
105 Correct 11 ms 7228 KB Output is correct
106 Correct 2 ms 4308 KB Output is correct
107 Correct 20 ms 8408 KB Output is correct
108 Correct 25 ms 10196 KB Output is correct
109 Correct 2 ms 4416 KB Output is correct
110 Correct 36 ms 12140 KB Output is correct
111 Correct 41 ms 14224 KB Output is correct
112 Correct 2 ms 4436 KB Output is correct
113 Correct 63 ms 18584 KB Output is correct
114 Incorrect 742 ms 17316 KB Output isn't correct
115 Halted 0 ms 0 KB -