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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #625523 | #6354. 4 | cjx | TL | 196ms | 41156kb | C++20 | 2.1kb | 2024-10-09 19:36:52 | 2024-10-09 19:36:52 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
#define pii(x,y) 1ll*x*300000ll+y
using namespace std;
long long read(){
long long x=0,f=1;char ch=getchar();
while(!isdigit(ch))
{if(ch=='-') f=-1;ch=getchar();}
while(isdigit(ch)){x=x*10+ch-48;ch=getchar();}
return x*f;
}
void write(long long x){
if(x<0) putchar('-'),x=-x;
if(x>9) write(x/10);
putchar(x%10+'0');
}
const int N=1e5+10;
int n,m;
//vector<int>g0[N<<1],g1[N<<1],g2[N<<1],g3[N<<1];
unordered_map<ll,int>mp,mp2;
//hash<pair<int,int>> hsh;
int deg0[N<<1],deg2[N<<1];
struct Graph{
int head[N<<1],nxt[N<<4],ver[N<<4],tot;
void add(int x,int y){
ver[++tot]=y,nxt[tot]=head[x],head[x]=tot;
}
}g0,g1,g2,g3;
ll ans;
int main(){
//freopen(".in","r",stdin);
//freopen(".out","w",stdout);
n=read();m=read();
for(int i=1;i<=m;i++){
int x=read(),y=read();
g0.add(x,y);
g0.add(y,x);
g2.add(x,y);
g2.add(y,x);
deg0[x]++;deg0[y]++;
deg2[x]++;deg2[y]++;
mp[pii(x,y)]=i+n;
mp[pii(y,x)]=i+n;
}
for(register int x=1;x<=n;x++){
for(register int i=g0.head[x],y;i;i=g0.nxt[i]){
y=g0.ver[i];
if(deg0[x]<deg0[y]||(deg0[x]==deg0[y]&&x<y)){
//printf("g1 %d %d\n",x,y);
g1.add(x,y);
}
}
}
int sum=0;
for(register int x=1,u;x<=n;x++){
for(register int i=g1.head[x],y;i;i=g1.nxt[i]){
y=g1.ver[i];
for(register int j=g1.head[y],z;j;j=g1.nxt[j]){
z=g1.ver[j];
if(u=mp[pii(x,z)]){
g2.add(y,u);
g2.add(u,y);
sum++;
}
}
}
}
if(n==447)cout<<sum<<endl;
for(register int x=1;x<=n+m;x++){
for(register int i=g2.head[x],y;i;i=g2.nxt[i]){
y=g2.ver[i];
if(deg2[x]<deg2[y]||(deg2[x]==deg2[y]&&x<y)){
//printf("add %d %d\n",x,y);
g3.add(x,y);
mp2[pii(x,y)]=mp2[pii(y,x)]=1;
}
}
}
for(int x=1;x<=n+m;x++){
for(register int i=g3.head[x],y;i;i=g3.nxt[i]){
y=g3.ver[i];
for(register int j=g3.head[y],z;j;j=g3.nxt[j]){
z=g3.ver[j];
if(!mp2[pii(x,z)])continue;
int cnt=(x>n)+(y>n)+(z>n);
if(cnt==1){
ans++;
//printf("(%d %d %d)\n",x,y,z);
}
}
}
}
write(ans);puts("");
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 3ms
memory: 15928kb
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: 0ms
memory: 3600kb
input:
4 0
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 0ms
memory: 16124kb
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: 196ms
memory: 41156kb
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: 88ms
memory: 31908kb
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...
output:
14786015