QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #772389 | #6354. 4 | zhutongbo | TL | 802ms | 9208kb | C++20 | 1.1kb | 2024-11-22 19:13:43 | 2024-11-22 19:13:43 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=1e5+10;
inline int read() {
int x=0;
char ch=getchar();
while(ch<'0'||ch>'9') ch=getchar();
while(ch>='0'&&ch<='9') {
x=(x<<1)+(x<<3)+(ch^48);
ch=getchar();
}
return x;
}
inline void write(int x) {
if(x>9) write(x/10);
putchar(x%10+'0');
}
int n,m;
int ans;
int u[N],v[N];
int d[N],p[N];
vector<int> e[N];
bitset<N> f[N];
signed main() {
// freopen("friend.in","r",stdin);
// freopen("friend.out","w",stdout);
n=read(),m=read();
for(int i=1; i<=m; i++) {
u[i]=read(),v[i]=read();
d[u[i]]++,d[v[i]]++;
}
for(int i=1; i<=m; i++) {
if(d[u[i]]>d[v[i]]||(d[u[i]]==d[v[i]]&&u[i]>v[i])) swap(u[i],v[i]);
e[u[i]].push_back(v[i]);
}
for(int i=1; i<=n; i++) {
int cnt=0;
for(int v:e[i]) p[v]=++cnt;
for(int v:e[i]) {
for(int vv:e[v]) {
if(!p[vv]) continue;
f[v][p[vv]]=f[vv][p[v]]=1;
}
}
for(int v:e[i]) {
for(int vv:e[v]) {
if(!p[vv]) continue;
ans+=(f[v]&f[vv]).count();
}
}
for(int v:e[i]) {
p[v]=0;
f[v].reset();
}
}
write(ans/3);
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 7800kb
input:
5 9 1 2 1 3 1 4 1 5 2 3 2 4 2 5 3 4 3 5
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3620kb
input:
4 0
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 0ms
memory: 8260kb
input:
50 50 28 35 12 24 31 50 10 24 21 44 5 31 23 36 31 45 6 39 4 8 13 37 42 48 17 45 19 33 12 21 19 32 16 43 12 47 25 31 40 48 8 49 43 48 6 42 27 34 13 39 17 40 13 35 3 49 20 24 5 12 43 44 15 37 24 27 8 43 4 22 17 38 28 47 29 46 3 15 9 49 1 41 43 45 3 6 37 48 13 30 11 43 8 25 33 38 16 32 32 41
output:
0
result:
ok 1 number(s): "0"
Test #4:
score: 0
Accepted
time: 802ms
memory: 8344kb
input:
100 4900 64 78 3 13 93 96 48 64 34 64 5 76 66 74 44 78 17 20 30 73 5 34 24 100 23 65 4 70 22 95 47 70 6 89 15 70 70 82 88 90 29 80 27 64 16 59 28 99 67 68 85 99 37 85 8 46 71 78 40 95 6 21 27 66 16 89 11 83 17 57 19 36 21 70 27 86 27 45 5 56 10 64 23 33 87 91 37 40 21 55 75 79 54 96 3 77 70 78 36 93...
output:
3689634
result:
ok 1 number(s): "3689634"
Test #5:
score: 0
Accepted
time: 432ms
memory: 9208kb
input:
100 4000 73 78 38 98 9 65 43 72 20 47 6 37 49 60 48 87 48 77 23 100 57 59 42 99 40 88 20 96 19 44 35 80 12 93 34 44 63 75 3 49 32 99 47 61 3 13 54 81 55 96 16 74 28 77 43 45 25 92 5 82 3 83 9 55 64 78 39 89 19 64 58 75 1 18 22 76 16 55 18 60 14 55 29 96 37 97 26 97 11 53 24 79 7 35 53 54 31 74 31 32...
output:
1094294
result:
ok 1 number(s): "1094294"
Test #6:
score: -100
Time Limit Exceeded
input:
447 99681 346 391 18 307 271 438 50 436 84 215 64 104 291 325 278 355 152 228 7 117 174 410 61 386 7 204 264 327 366 409 291 405 42 131 89 203 1 175 229 292 225 320 1 310 89 185 161 340 401 406 265 377 119 313 253 403 190 383 305 367 334 424 88 327 77 357 25 334 56 62 68 245 1 13 290 336 94 354 10 3...