Submission #991876
Source Code Expand
#include <cstdio>
#include <vector>
#include <cstring>
using namespace std;
const int MAX_N = 111111;
struct uni {
int p[MAX_N];
uni(){init();}
void init(){ memset(p,-1,sizeof(p)); }
int root(int a) {
return p[a]<0?a:(p[a]=root(p[a]));
}
bool find(int a,int b){ return root(a) == root(b); }
bool merge(int a,int b) {
a = root(a);
b = root(b);
if( a == b ) return false;
p[a] += p[b];
p[b] = a;
return true;
}
int size(int a){ return -p[root(a)]; }
};
vector<int> g[111111];
uni u;
int main(void) {
int n, m;
scanf("%d%d", &n, &m);
for (int i = 0; i < n; i++) {
int k; scanf("%d", &k);
for (int j = 0; j < k; j++) {
int l; scanf("%d", &l); --l;
g[l].push_back(i);
}
}
for (int i = 0; i < m; i++) {
for (int j = 1; j < int(g[i].size()); j++) {
u.merge(g[i][0], g[i][j]);
}
}
bool ok = true;
for (int i = 0; i < n; i++) {
if (u.root(0) != u.root(i)) ok = false;
}
puts(ok ? "YES" : "NO");
return 0;
}
Submission Info
Submission Time
2016-11-26 12:41:29+0900
Task
C - Interpretation
User
roxion1377
Language
C++14 (GCC 5.4.1)
Score
400
Code Size
1069 Byte
Status
AC
Exec Time
30 ms
Memory
5248 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d", &n, &m);
^
./Main.cpp:35:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
int k; scanf("%d", &k);
^
./Main.cpp:37:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
int l; scanf("%d", &l); --l;
^
Judge Result
Set Name
sample
dataset1
dataset2
Score / Max Score
0 / 0
200 / 200
200 / 200
Status
Set Name
Test Cases
sample
sample-01.txt, sample-02.txt
dataset1
sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt
dataset2
sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 02-01.txt, 02-02.txt, 02-03.txt, 02-04.txt, 02-05.txt, 02-06.txt, 02-07.txt, 02-08.txt, 02-09.txt, 02-10.txt, 02-11.txt, 02-12.txt, 02-13.txt
Case Name
Status
Exec Time
Memory
01-01.txt
AC
5 ms
3328 KB
01-02.txt
AC
6 ms
3328 KB
01-03.txt
AC
6 ms
3328 KB
01-04.txt
AC
6 ms
3328 KB
01-05.txt
AC
6 ms
3328 KB
01-06.txt
AC
6 ms
3456 KB
01-07.txt
AC
6 ms
3328 KB
01-08.txt
AC
6 ms
3328 KB
01-09.txt
AC
6 ms
3328 KB
01-10.txt
AC
6 ms
3328 KB
02-01.txt
AC
25 ms
5248 KB
02-02.txt
AC
23 ms
3840 KB
02-03.txt
AC
25 ms
4608 KB
02-04.txt
AC
30 ms
4608 KB
02-05.txt
AC
28 ms
4096 KB
02-06.txt
AC
30 ms
4608 KB
02-07.txt
AC
28 ms
4096 KB
02-08.txt
AC
21 ms
3840 KB
02-09.txt
AC
24 ms
3964 KB
02-10.txt
AC
23 ms
5120 KB
02-11.txt
AC
23 ms
5120 KB
02-12.txt
AC
24 ms
4992 KB
02-13.txt
AC
23 ms
4992 KB
sample-01.txt
AC
5 ms
3328 KB
sample-02.txt
AC
5 ms
3328 KB