제출 #378084

#제출 시각아이디문제언어결과실행 시간메모리
378084daniel920712Designated Cities (JOI19_designated_cities)C++14
13 / 100
644 ms86080 KiB
#include <iostream> #include <stdio.h> #include <stdlib.h> #include <vector> #include <map> #include <set> using namespace std; vector < pair < long long , long long > > Next[200005]; map < long long , long long > all[200005]; set < long long > vis[200005]; long long ans[200005]; long long xx[200005]; long long how[200005]; long long N=0,big=0; pair < long long , long long > A,B; void F(long long here,long long fa) { for(auto i:Next[here]) { if(i.first!=fa) { ans[1]+=i.second; F(i.first,here); } } } void F2(long long here,long long fa) { for(auto i:Next[here]) { if(i.first!=fa) { ans[i.first]=ans[here]-all[here][i.first]+all[i.first][here]; F2(i.first,here); } } } void F3(long long here,long long fa) { for(auto i:Next[here]) { if(i.first!=fa) { vis[here].insert(i.first); F3(i.first,here); } } } pair < long long , long long > F4(long long here,long long fa,long long con) { pair < long long , long long > a=make_pair(con,here),b=make_pair(con,here),tt; for(auto i:Next[here]) { if(i.first!=fa) { tt=F4(i.first,here,con+i.second); if(tt>a) { b=a; a=tt; } else if(tt>b) { b=tt; } } } big=max(big,a.first+b.first-con); return a; } int main() { //freopen("03-02.txt","rt",stdin); long long M,i,j,k,a,b,c,d,where; scanf("%lld",&N); for(i=1;i<N;i++) { scanf("%lld %lld %lld %lld",&a,&b,&c,&d); Next[a].push_back(make_pair(b,c)); Next[b].push_back(make_pair(a,d)); all[a][b]=c; all[b][a]=d; } for(i=1;i<=N;i++) xx[i]=1e18; if(N<=16) { for(i=0;i<(1<<N);i++) { a=0; b=0; for(j=1;j<=N;j++) vis[j].clear(); for(j=0;j<N;j++) { if(i&(1<<j)) { F3(j+1,-1); a++; } } for(j=1;j<=N;j++) for(auto k:Next[j]) if(vis[j].find(k.first)==vis[j].end()) b+=all[k.first][j]; xx[a]=min(xx[a],b); } scanf("%lld",&M); while(M--) { scanf("%lld",&a); printf("%lld\n",xx[a]); } } else { F(1,-1); F2(1,-1); how[1]=1e18; for(i=1;i<=N;i++) { how[1]=min(how[1],ans[i]); if(how[1]==ans[i]) where=i; } F4(where,-1,0); how[2]=how[1]-big; scanf("%lld",&M); while(M--) { scanf("%lld",&a); //printf("%lld\n",a); printf("%lld\n",how[a]); } } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

designated_cities.cpp: In function 'int main()':
designated_cities.cpp:75:21: warning: unused variable 'k' [-Wunused-variable]
   75 |     long long M,i,j,k,a,b,c,d,where;
      |                     ^
designated_cities.cpp:76:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   76 |     scanf("%lld",&N);
      |     ~~~~~^~~~~~~~~~~
designated_cities.cpp:79:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   79 |         scanf("%lld %lld %lld %lld",&a,&b,&c,&d);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:104:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  104 |         scanf("%lld",&M);
      |         ~~~~~^~~~~~~~~~~
designated_cities.cpp:107:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  107 |             scanf("%lld",&a);
      |             ~~~~~^~~~~~~~~~~
designated_cities.cpp:123:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  123 |         scanf("%lld",&M);
      |         ~~~~~^~~~~~~~~~~
designated_cities.cpp:126:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  126 |             scanf("%lld",&a);
      |             ~~~~~^~~~~~~~~~~
designated_cities.cpp:121:22: warning: 'where' may be used uninitialized in this function [-Wmaybe-uninitialized]
  121 |         F4(where,-1,0);
      |                      ^
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...