oj.uz

Submission #805297

# Submission time Handle Problem Language Result Execution time Memory
805297 2023-08-03T14:54:37 Z YassirSalama Dreaming (IOI13_dreaming) C++17
47 / 100
 801 ms 65536 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=1e9;
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();
    // cout<<d<<endl;
    for(int i=0;i<d;i++){
        for(int j=i+1;j<d;j++){
            int nodea=diameters[i].S;
            int nodeb=diameters[j].S;
            int a,b,c,e;
            ll besta=diameters[i].F;
            ll bestb=diameters[j].F;
            // dbg(nodea,nodeb,besta,bestb);
            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:107:17: warning: unused variable 'a' [-Wunused-variable]
  107 |             int a,b,c,e;
      |                 ^
dreaming.cpp:107:19: warning: unused variable 'b' [-Wunused-variable]
  107 |             int a,b,c,e;
      |                   ^
dreaming.cpp:107:21: warning: unused variable 'c' [-Wunused-variable]
  107 |             int a,b,c,e;
      |                     ^
dreaming.cpp:107:23: warning: unused variable 'e' [-Wunused-variable]
  107 |             int a,b,c,e;
      |                       ^

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 17404 KB Output is correct
2 Correct 39 ms 17352 KB Output is correct
3 Correct 27 ms 12656 KB Output is correct
4 Correct 7 ms 6248 KB Output is correct
5 Correct 6 ms 5204 KB Output is correct
6 Correct 11 ms 7228 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 22 ms 8392 KB Output is correct
9 Correct 30 ms 10232 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12116 KB Output is correct
12 Correct 43 ms 14228 KB Output is correct
13 Correct 2 ms 4436 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory 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 2 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 4276 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 2 ms 4308 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 17404 KB Output is correct
2 Correct 39 ms 17352 KB Output is correct
3 Correct 27 ms 12656 KB Output is correct
4 Correct 7 ms 6248 KB Output is correct
5 Correct 6 ms 5204 KB Output is correct
6 Correct 11 ms 7228 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 22 ms 8392 KB Output is correct
9 Correct 30 ms 10232 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12116 KB Output is correct
12 Correct 43 ms 14228 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 2 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 4276 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 2 ms 4308 KB Output is correct
39 Correct 39 ms 17372 KB Output is correct
40 Correct 39 ms 17412 KB Output is correct
41 Correct 26 ms 12792 KB Output is correct
42 Correct 7 ms 6228 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 2 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 3 ms 4308 KB Output is correct
51 Correct 2 ms 4308 KB Output is correct
52 Correct 2 ms 4264 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 9732 KB Output is correct
58 Correct 44 ms 9768 KB Output is correct
59 Correct 60 ms 9808 KB Output is correct
60 Correct 49 ms 9836 KB Output is correct
61 Correct 45 ms 9676 KB Output is correct
62 Correct 45 ms 9676 KB Output is correct
63 Correct 54 ms 9308 KB Output is correct
64 Correct 41 ms 9248 KB Output is correct
65 Correct 44 ms 9240 KB Output is correct
66 Correct 59 ms 9308 KB Output is correct
67 Correct 48 ms 9804 KB Output is correct
68 Correct 56 ms 9820 KB Output is correct
69 Correct 46 ms 9768 KB Output is correct
70 Correct 45 ms 9764 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 4436 KB Output is correct
79 Correct 3 ms 4492 KB Output is correct
80 Correct 46 ms 9792 KB Output is correct
81 Correct 45 ms 9796 KB Output is correct
82 Correct 43 ms 9680 KB Output is correct
83 Correct 41 ms 9724 KB Output is correct
84 Correct 2 ms 4436 KB Output is correct
85 Correct 2 ms 4436 KB Output is correct
86 Correct 3 ms 4480 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 3 ms 4436 KB Output is correct
92 Correct 3 ms 4436 KB Output is correct
93 Correct 3 ms 4436 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 4308 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 12 ms 7200 KB Output is correct
106 Correct 2 ms 4308 KB Output is correct
107 Correct 19 ms 8488 KB Output is correct
108 Correct 30 ms 10256 KB Output is correct
109 Correct 2 ms 4308 KB Output is correct
110 Correct 35 ms 12172 KB Output is correct
111 Correct 43 ms 14216 KB Output is correct
112 Correct 2 ms 4436 KB Output is correct
113 Correct 62 ms 18632 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 801 ms 65536 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory 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 2 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 4276 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 2 ms 4308 KB Output is correct
26 Correct 5 ms 4888 KB Output is correct
27 Correct 10 ms 6120 KB Output is correct
28 Correct 16 ms 7756 KB Output is correct
29 Incorrect 5 ms 4920 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 17404 KB Output is correct
2 Correct 39 ms 17352 KB Output is correct
3 Correct 27 ms 12656 KB Output is correct
4 Correct 7 ms 6248 KB Output is correct
5 Correct 6 ms 5204 KB Output is correct
6 Correct 11 ms 7228 KB Output is correct
7 Correct 2 ms 4308 KB Output is correct
8 Correct 22 ms 8392 KB Output is correct
9 Correct 30 ms 10232 KB Output is correct
10 Correct 2 ms 4308 KB Output is correct
11 Correct 38 ms 12116 KB Output is correct
12 Correct 43 ms 14228 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 2 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 4276 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 2 ms 4308 KB Output is correct
39 Correct 39 ms 17372 KB Output is correct
40 Correct 39 ms 17412 KB Output is correct
41 Correct 26 ms 12792 KB Output is correct
42 Correct 7 ms 6228 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 2 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 3 ms 4308 KB Output is correct
51 Correct 2 ms 4308 KB Output is correct
52 Correct 2 ms 4264 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 9732 KB Output is correct
58 Correct 44 ms 9768 KB Output is correct
59 Correct 60 ms 9808 KB Output is correct
60 Correct 49 ms 9836 KB Output is correct
61 Correct 45 ms 9676 KB Output is correct
62 Correct 45 ms 9676 KB Output is correct
63 Correct 54 ms 9308 KB Output is correct
64 Correct 41 ms 9248 KB Output is correct
65 Correct 44 ms 9240 KB Output is correct
66 Correct 59 ms 9308 KB Output is correct
67 Correct 48 ms 9804 KB Output is correct
68 Correct 56 ms 9820 KB Output is correct
69 Correct 46 ms 9768 KB Output is correct
70 Correct 45 ms 9764 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 4436 KB Output is correct
79 Correct 3 ms 4492 KB Output is correct
80 Correct 46 ms 9792 KB Output is correct
81 Correct 45 ms 9796 KB Output is correct
82 Correct 43 ms 9680 KB Output is correct
83 Correct 41 ms 9724 KB Output is correct
84 Correct 2 ms 4436 KB Output is correct
85 Correct 2 ms 4436 KB Output is correct
86 Correct 3 ms 4480 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 3 ms 4436 KB Output is correct
92 Correct 3 ms 4436 KB Output is correct
93 Correct 3 ms 4436 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 4308 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 12 ms 7200 KB Output is correct
106 Correct 2 ms 4308 KB Output is correct
107 Correct 19 ms 8488 KB Output is correct
108 Correct 30 ms 10256 KB Output is correct
109 Correct 2 ms 4308 KB Output is correct
110 Correct 35 ms 12172 KB Output is correct
111 Correct 43 ms 14216 KB Output is correct
112 Correct 2 ms 4436 KB Output is correct
113 Correct 62 ms 18632 KB Output is correct
114 Runtime error 801 ms 65536 KB Execution killed with signal 9
115 Halted 0 ms 0 KB -