Submission #1097758

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1097758	2024-10-08 08:09:55	vjudge1	The Xana coup (BOI21_xanadu)	C++17	100 / 100	34 ms	17812 KiB

xanadu

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#include<iostream>
#include<cstdio>
#include<bitset>
using namespace std;
const int N=1e5+10,inf=0x3f3f3f3f;
int cnt,hd[N],to[N<<1],nxt[N<<1];
void add(int u,int v){
  ++cnt;
  to[cnt]=v;
  nxt[cnt]=hd[u];
  hd[u]=cnt;
}
bitset<N>aa,used;
int f[N][2][2],g[N][2][2];
void dfs(int p){
  bool ju=1;
  int pre=0;
  used[p]=1;
  for(int i=hd[p];i;i=nxt[i]){
    if(used[to[i]])continue;
    ju=0;
    dfs(to[i]);
    g[to[i]][0][0]=min(min(g[pre][0][0]+f[to[i]][0][0],inf),min(g[pre][0][1]+f[to[i]][1][0],inf));
    g[to[i]][0][1]=min(min(g[pre][0][1]+f[to[i]][0][0],inf),min(g[pre][0][0]+f[to[i]][1][0],inf));
    g[to[i]][1][0]=min(min(g[pre][1][0]+f[to[i]][0][1],inf),min(g[pre][1][1]+f[to[i]][1][1],inf));
    g[to[i]][1][1]=min(min(g[pre][1][1]+f[to[i]][0][1],inf),min(g[pre][1][0]+f[to[i]][1][1],inf));
    pre=to[i];
  }
  if(ju){
    f[p][0][0]=(aa[p]?inf:0);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

xanadu.cpp: In function 'int main()':
xanadu.cpp:43:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
xanadu.cpp:45:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d%d",&u,&v);
      |   ~~~~~^~~~~~~~~~~~~~
xanadu.cpp:51:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |   scanf("%d",&oo);
      |   ~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30