結果

問題 No.1365 [Cherry 1st Tune] Whose Fault?
コンテスト
ユーザー Nachia
提出日時 2021-02-06 17:08:31
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 231 ms / 2,000 ms
コード長 571 bytes
コンパイル時間 2,131 ms
コンパイル使用メモリ 197,176 KB
最終ジャッジ日時 2025-01-18 13:37:12
ジャッジサーバーID
（参考情報） 		judge4 / judge5
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ファイルパターン 結果
other AC * 46
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コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:4:19: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    4 | #define S(a) scanf("%d",&a);
      |              ~~~~~^~~~~~~~~
main.cpp:12:1: note: in expansion of macro ‘S’
   12 | S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
      | ^
main.cpp:4:19: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    4 | #define S(a) scanf("%d",&a);
      |              ~~~~~^~~~~~~~~
main.cpp:12:14: note: in expansion of macro ‘S’
   12 | S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
      |              ^
main.cpp:4:19: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    4 | #define S(a) scanf("%d",&a);
      |              ~~~~~^~~~~~~~~
main.cpp:12:25: note: in expansion of macro ‘S’
   12 | S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
      |                         ^
main.cpp:4:19: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    4 | #define S(a) scanf("%d",&a);
      |              ~~~~~^~~~~~~~~
main.cpp:12:42: note: in expansion of macro ‘S’
   12 | S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
      |                                          ^
main.cpp:4:19: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    4 | #define S(a) scanf("%d",&a);
      |              ~~~~~^~~~~~~~~
main.cpp:12:68: note: in expansion of macro ‘S’
   12 | S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
      |

ソースコード

diff # 

#include<bits/stdc++.h>
using namespace std;
#define I int
#define S(a) scanf("%d",&a);
#define R for(I i=0;i<(N);i++)

struct D{vector<I> V;D(I n){V.assign(n,-1);}I r(I a){return(V[a]<0)?a:(V[a]=r(V[a]));}I u(I a,I b){a=r(a);b=r(b);return(a==b)?-1:(V[b]=a);}};
I N,A[100000],u,v,g;
double P[100000],ans=0.0;
double f(I i){return A[i]*A[i]/P[i];}
I main(){
S(N)D G(N);R S(A[i]);R {S(u);A[i]-=u;}R {S(u);P[i]=1./u;ans+=f(i);}S(N)
R{S(u)S(v)u=G.r(u-1);v=G.r(v-1);if(u!=v){g=G.u(u,v);ans-=f(u)+f(v);A[g]+=A[u+v-g];P[g]+=P[u+v-g];ans+=f(g);}printf("%.4f\n",ans);}
return 0;}
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