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Submission #1030647

# Submission time Handle Problem Language Result Execution time Memory
1030647 2024-07-22T08:07:22 Z sleepntsheep Graph (BOI20_graph) C
100 / 100
 84 ms 18760 KB 
#include<stdio.h>
#include<stdlib.h>
typedef double ld;
int C(const void*a,const void*b){
    ld x=*(const ld*)a-*(const ld*)b;
    return x<0?-1:(x>0?1:0);
}
#define N 100002
#define M 400001
ld a(ld x){return x<0?-x:x;}
int n,m,head[N],fr[M],to[M],nxt[M],col[M],ii,vis[N],aa[N],bb[N],grp[N],got[N],eo[N<<1];
ld *eh[N<<1];
void push(int i,ld j){
    int o=eo[i]++;
    if(!o)eh[i]=(ld*)malloc(2*sizeof**eh);
    else if(!(o&o-1))eh[i]=(ld*)realloc(eh[i],2*o*sizeof**eh);
    eh[i][o]=j;
}
ld xx[N];

void link(int u,int v,int c){
    int i=++ii;
    to[i]=v;
    fr[i]=u;
    col[i]=c;
    nxt[i]=head[u];
    head[u]=i;
}

void dfs(int u,int a,int b,int cp){
    if(vis[u]){
        if(a==aa[u]&&b!=bb[u]) exit(puts("NO")*0);
        return;
    }
    grp[u]=cp;
    if(a!=0) push(cp,-1.0f*b/a);
    vis[u]=1,aa[u]=a,bb[u]=b;
    for(int j=head[u];j;j=nxt[j])
        dfs(to[j],-a,col[j]-b,cp);
}

int main(){
    scanf("%d%d",&n,&m);
    for(int u,v,c,i=0;i<m;++i)scanf("%d%d%d",&u,&v,&c),link(u,v,c),link(v,u,c);
    for(int i=1;i<=n;++i)
        if(!vis[i])
            dfs(i,1,0,i);

    for(int j=1;j<ii;++j){
        ld a1=aa[fr[j]]+aa[to[j]],b1=bb[fr[j]]+bb[to[j]];
        if(a1==0&&b1!=col[j])exit(puts("NO")*0);
        if(b1==col[j]&&a1==0)continue;
        ld x = (col[j]-b1)/a1;
        if(got[grp[fr[j]]]){
            if(xx[grp[fr[j]]]!=x)
                exit(puts("NO")*0);
        }
        xx[grp[fr[j]]]=x,got[grp[fr[j]]]=1;
    }


    for(int i=1;i<=n;++i){
        if(got[grp[i]])continue;
        qsort(eh[grp[i]],eo[grp[i]],sizeof**eh,C);
        xx[grp[i]]=eh[grp[i]][(eo[grp[i]])/2];
        got[grp[i]]=1;
    }

    puts("YES");
    for(int i=1;i<=n;++i) printf("%.3f ",aa[i]*xx[grp[i]]+bb[i]);
}

Compilation message

Graph.c: In function 'push':
Graph.c:16:18: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   16 |     else if(!(o&o-1))eh[i]=(ld*)realloc(eh[i],2*o*sizeof**eh);
      |                 ~^~
Graph.c: In function 'main':
Graph.c:43:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |     scanf("%d%d",&n,&m);
      |     ^~~~~~~~~~~~~~~~~~~
Graph.c:44:31: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     for(int u,v,c,i=0;i<m;++i)scanf("%d%d%d",&u,&v,&c),link(u,v,c),link(v,u,c);
      |                               ^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB answer = YES
2 Correct 0 ms 348 KB answer = YES
3 Correct 0 ms 348 KB answer = YES
4 Correct 0 ms 348 KB answer = NO
5 Correct 0 ms 348 KB answer = YES
6 Correct 0 ms 348 KB answer = YES
7 Correct 0 ms 344 KB answer = YES
8 Correct 0 ms 348 KB answer = YES
9 Correct 0 ms 348 KB answer = NO
10 Correct 0 ms 348 KB answer = YES
11 Correct 0 ms 348 KB answer = YES
12 Correct 0 ms 348 KB answer = NO
13 Correct 0 ms 348 KB answer = YES
14 Correct 0 ms 348 KB answer = YES
15 Correct 0 ms 348 KB answer = YES
16 Correct 0 ms 348 KB answer = YES
17 Correct 0 ms 352 KB answer = YES
18 Correct 0 ms 348 KB answer = YES
19 Correct 0 ms 348 KB answer = YES
20 Correct 0 ms 348 KB answer = YES
21 Correct 0 ms 348 KB answer = YES
22 Correct 0 ms 348 KB answer = NO
23 Correct 0 ms 348 KB answer = NO

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB answer = YES
2 Correct 0 ms 348 KB answer = YES
3 Correct 0 ms 348 KB answer = YES
4 Correct 0 ms 348 KB answer = NO
5 Correct 0 ms 348 KB answer = YES
6 Correct 0 ms 348 KB answer = YES
7 Correct 0 ms 344 KB answer = YES
8 Correct 0 ms 348 KB answer = YES
9 Correct 0 ms 348 KB answer = NO
10 Correct 0 ms 348 KB answer = YES
11 Correct 0 ms 348 KB answer = YES
12 Correct 0 ms 348 KB answer = NO
13 Correct 0 ms 348 KB answer = YES
14 Correct 0 ms 348 KB answer = YES
15 Correct 0 ms 348 KB answer = YES
16 Correct 0 ms 348 KB answer = YES
17 Correct 0 ms 352 KB answer = YES
18 Correct 0 ms 348 KB answer = YES
19 Correct 0 ms 348 KB answer = YES
20 Correct 0 ms 348 KB answer = YES
21 Correct 0 ms 348 KB answer = YES
22 Correct 0 ms 348 KB answer = NO
23 Correct 0 ms 348 KB answer = NO
24 Correct 0 ms 348 KB answer = YES
25 Correct 0 ms 348 KB answer = YES
26 Correct 0 ms 348 KB answer = YES
27 Correct 0 ms 432 KB answer = YES
28 Correct 0 ms 348 KB answer = YES
29 Correct 0 ms 348 KB answer = YES
30 Correct 0 ms 348 KB answer = NO
31 Correct 0 ms 348 KB answer = YES
32 Correct 0 ms 432 KB answer = YES
33 Correct 0 ms 348 KB answer = YES
34 Correct 1 ms 604 KB answer = YES
35 Correct 0 ms 348 KB answer = YES
36 Correct 1 ms 348 KB answer = YES

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB answer = YES
2 Correct 0 ms 348 KB answer = YES
3 Correct 0 ms 348 KB answer = YES
4 Correct 0 ms 348 KB answer = NO
5 Correct 0 ms 348 KB answer = YES
6 Correct 0 ms 348 KB answer = YES
7 Correct 0 ms 344 KB answer = YES
8 Correct 0 ms 348 KB answer = YES
9 Correct 0 ms 348 KB answer = NO
10 Correct 0 ms 348 KB answer = YES
11 Correct 0 ms 348 KB answer = YES
12 Correct 0 ms 348 KB answer = NO
13 Correct 0 ms 348 KB answer = YES
14 Correct 0 ms 348 KB answer = YES
15 Correct 0 ms 348 KB answer = YES
16 Correct 0 ms 348 KB answer = YES
17 Correct 0 ms 352 KB answer = YES
18 Correct 0 ms 348 KB answer = YES
19 Correct 0 ms 348 KB answer = YES
20 Correct 0 ms 348 KB answer = YES
21 Correct 0 ms 348 KB answer = YES
22 Correct 0 ms 348 KB answer = NO
23 Correct 0 ms 348 KB answer = NO
24 Correct 0 ms 348 KB answer = YES
25 Correct 0 ms 348 KB answer = YES
26 Correct 0 ms 348 KB answer = YES
27 Correct 0 ms 432 KB answer = YES
28 Correct 0 ms 348 KB answer = YES
29 Correct 0 ms 348 KB answer = YES
30 Correct 0 ms 348 KB answer = NO
31 Correct 0 ms 348 KB answer = YES
32 Correct 0 ms 432 KB answer = YES
33 Correct 0 ms 348 KB answer = YES
34 Correct 1 ms 604 KB answer = YES
35 Correct 0 ms 348 KB answer = YES
36 Correct 1 ms 348 KB answer = YES
37 Correct 1 ms 344 KB answer = YES
38 Correct 1 ms 344 KB answer = YES
39 Correct 0 ms 348 KB answer = YES
40 Correct 0 ms 348 KB answer = YES
41 Correct 1 ms 348 KB answer = NO
42 Correct 1 ms 440 KB answer = YES
43 Correct 1 ms 348 KB answer = YES
44 Correct 1 ms 348 KB answer = YES
45 Correct 0 ms 348 KB answer = YES
46 Correct 0 ms 348 KB answer = YES
47 Correct 1 ms 348 KB answer = YES
48 Correct 1 ms 348 KB answer = YES

Subtask #4
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB answer = YES
2 Correct 0 ms 348 KB answer = YES
3 Correct 0 ms 348 KB answer = YES
4 Correct 0 ms 348 KB answer = NO
5 Correct 0 ms 348 KB answer = YES
6 Correct 0 ms 348 KB answer = YES
7 Correct 0 ms 344 KB answer = YES
8 Correct 0 ms 348 KB answer = YES
9 Correct 0 ms 348 KB answer = NO
10 Correct 0 ms 348 KB answer = YES
11 Correct 0 ms 348 KB answer = YES
12 Correct 0 ms 348 KB answer = NO
13 Correct 0 ms 348 KB answer = YES
14 Correct 0 ms 348 KB answer = YES
15 Correct 0 ms 348 KB answer = YES
16 Correct 0 ms 348 KB answer = YES
17 Correct 0 ms 352 KB answer = YES
18 Correct 0 ms 348 KB answer = YES
19 Correct 0 ms 348 KB answer = YES
20 Correct 0 ms 348 KB answer = YES
21 Correct 0 ms 348 KB answer = YES
22 Correct 0 ms 348 KB answer = NO
23 Correct 0 ms 348 KB answer = NO
24 Correct 0 ms 348 KB answer = YES
25 Correct 0 ms 348 KB answer = YES
26 Correct 0 ms 348 KB answer = YES
27 Correct 0 ms 432 KB answer = YES
28 Correct 0 ms 348 KB answer = YES
29 Correct 0 ms 348 KB answer = YES
30 Correct 0 ms 348 KB answer = NO
31 Correct 0 ms 348 KB answer = YES
32 Correct 0 ms 432 KB answer = YES
33 Correct 0 ms 348 KB answer = YES
34 Correct 1 ms 604 KB answer = YES
35 Correct 0 ms 348 KB answer = YES
36 Correct 1 ms 348 KB answer = YES
37 Correct 1 ms 344 KB answer = YES
38 Correct 1 ms 344 KB answer = YES
39 Correct 0 ms 348 KB answer = YES
40 Correct 0 ms 348 KB answer = YES
41 Correct 1 ms 348 KB answer = NO
42 Correct 1 ms 440 KB answer = YES
43 Correct 1 ms 348 KB answer = YES
44 Correct 1 ms 348 KB answer = YES
45 Correct 0 ms 348 KB answer = YES
46 Correct 0 ms 348 KB answer = YES
47 Correct 1 ms 348 KB answer = YES
48 Correct 1 ms 348 KB answer = YES
49 Correct 4 ms 1116 KB answer = YES
50 Correct 4 ms 1372 KB answer = YES
51 Correct 4 ms 1628 KB answer = YES
52 Correct 2 ms 1372 KB answer = NO
53 Correct 1 ms 356 KB answer = YES
54 Correct 1 ms 604 KB answer = YES
55 Correct 2 ms 860 KB answer = YES
56 Correct 4 ms 1116 KB answer = YES
57 Correct 4 ms 1372 KB answer = YES
58 Correct 3 ms 1116 KB answer = YES
59 Correct 3 ms 1116 KB answer = YES
60 Correct 5 ms 1364 KB answer = YES
61 Correct 2 ms 860 KB answer = YES
62 Correct 29 ms 9040 KB answer = NO
63 Correct 46 ms 9672 KB answer = YES
64 Correct 31 ms 9280 KB answer = NO
65 Correct 43 ms 9688 KB answer = YES
66 Correct 1 ms 604 KB answer = YES

Subtask #5
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB answer = YES
2 Correct 0 ms 348 KB answer = YES
3 Correct 0 ms 348 KB answer = YES
4 Correct 0 ms 348 KB answer = NO
5 Correct 0 ms 348 KB answer = YES
6 Correct 0 ms 348 KB answer = YES
7 Correct 0 ms 344 KB answer = YES
8 Correct 0 ms 348 KB answer = YES
9 Correct 0 ms 348 KB answer = NO
10 Correct 0 ms 348 KB answer = YES
11 Correct 0 ms 348 KB answer = YES
12 Correct 0 ms 348 KB answer = NO
13 Correct 0 ms 348 KB answer = YES
14 Correct 0 ms 348 KB answer = YES
15 Correct 0 ms 348 KB answer = YES
16 Correct 0 ms 348 KB answer = YES
17 Correct 0 ms 352 KB answer = YES
18 Correct 0 ms 348 KB answer = YES
19 Correct 0 ms 348 KB answer = YES
20 Correct 0 ms 348 KB answer = YES
21 Correct 0 ms 348 KB answer = YES
22 Correct 0 ms 348 KB answer = NO
23 Correct 0 ms 348 KB answer = NO
24 Correct 0 ms 348 KB answer = YES
25 Correct 0 ms 348 KB answer = YES
26 Correct 0 ms 348 KB answer = YES
27 Correct 0 ms 432 KB answer = YES
28 Correct 0 ms 348 KB answer = YES
29 Correct 0 ms 348 KB answer = YES
30 Correct 0 ms 348 KB answer = NO
31 Correct 0 ms 348 KB answer = YES
32 Correct 0 ms 432 KB answer = YES
33 Correct 0 ms 348 KB answer = YES
34 Correct 1 ms 604 KB answer = YES
35 Correct 0 ms 348 KB answer = YES
36 Correct 1 ms 348 KB answer = YES
37 Correct 1 ms 344 KB answer = YES
38 Correct 1 ms 344 KB answer = YES
39 Correct 0 ms 348 KB answer = YES
40 Correct 0 ms 348 KB answer = YES
41 Correct 1 ms 348 KB answer = NO
42 Correct 1 ms 440 KB answer = YES
43 Correct 1 ms 348 KB answer = YES
44 Correct 1 ms 348 KB answer = YES
45 Correct 0 ms 348 KB answer = YES
46 Correct 0 ms 348 KB answer = YES
47 Correct 1 ms 348 KB answer = YES
48 Correct 1 ms 348 KB answer = YES
49 Correct 4 ms 1116 KB answer = YES
50 Correct 4 ms 1372 KB answer = YES
51 Correct 4 ms 1628 KB answer = YES
52 Correct 2 ms 1372 KB answer = NO
53 Correct 1 ms 356 KB answer = YES
54 Correct 1 ms 604 KB answer = YES
55 Correct 2 ms 860 KB answer = YES
56 Correct 4 ms 1116 KB answer = YES
57 Correct 4 ms 1372 KB answer = YES
58 Correct 3 ms 1116 KB answer = YES
59 Correct 3 ms 1116 KB answer = YES
60 Correct 5 ms 1364 KB answer = YES
61 Correct 2 ms 860 KB answer = YES
62 Correct 29 ms 9040 KB answer = NO
63 Correct 46 ms 9672 KB answer = YES
64 Correct 31 ms 9280 KB answer = NO
65 Correct 43 ms 9688 KB answer = YES
66 Correct 1 ms 604 KB answer = YES
67 Correct 54 ms 14676 KB answer = YES
68 Correct 38 ms 14632 KB answer = YES
69 Correct 33 ms 14420 KB answer = YES
70 Correct 48 ms 18048 KB answer = YES
71 Correct 36 ms 14584 KB answer = YES
72 Correct 46 ms 8540 KB answer = YES
73 Correct 38 ms 8300 KB answer = YES
74 Correct 29 ms 8784 KB answer = YES
75 Correct 15 ms 8416 KB answer = NO
76 Correct 5 ms 1372 KB answer = YES
77 Correct 11 ms 2492 KB answer = YES
78 Correct 25 ms 4028 KB answer = YES
79 Correct 48 ms 7268 KB answer = YES
80 Correct 42 ms 9012 KB answer = YES
81 Correct 22 ms 10956 KB answer = NO
82 Correct 45 ms 11676 KB answer = YES
83 Correct 58 ms 14836 KB answer = YES
84 Correct 56 ms 14608 KB answer = YES
85 Correct 52 ms 14764 KB answer = YES
86 Correct 43 ms 14580 KB answer = YES
87 Correct 33 ms 9064 KB answer = NO
88 Correct 50 ms 11040 KB answer = YES
89 Correct 39 ms 10784 KB answer = YES
90 Correct 40 ms 10760 KB answer = YES
91 Correct 46 ms 10824 KB answer = YES
92 Correct 25 ms 4436 KB answer = YES
93 Correct 19 ms 4444 KB answer = YES
94 Correct 32 ms 13956 KB answer = NO
95 Correct 30 ms 9712 KB answer = NO
96 Correct 84 ms 18760 KB answer = YES
97 Correct 27 ms 13980 KB answer = NO