Submission #134468

#	Time	Username	Problem	Language	Result	Execution time	Memory
134468		model_code	송금 (JOI19_remittance)	C++17	100 / 100	418 ms	39620 KiB

remittance

#include <cstdio>
#include <vector>

using namespace std;

int main()
{
  int n;
  scanf("%d",&n);
  vector<vector<long long> > A(2,vector<long long>(n));
  for(int i=0;i<n;i++){
    scanf("%lld%lld",&A[0][i],&A[1][i]);
  }
  bool ans=true;
  bool F=true;
  for(int i=0;i<n;i++){
    if(A[1][i]>0){
      F=false;
    }
  }
  if(F){
    for(int i=0;i<n;i++){
      if(A[0][i]>0){
	ans=false;
      }
    }
  }
  vector<vector<long long> > b(2,vector<long long>(n));
  long long  K[2];
  for(int t=0;t<2;t++){
    for(int i=0;i<n;i++){
      b[t][i]=A[t][i];
    }
    K[t]=0ll;
    long long r=0ll;
    do{
      for(int i=0;i<n;i++){
	long long T=b[t][i]+r;
	b[t][i]=T%2;
	r=T/2;
      }
      K[t]+=r;
    }while(r>0);
    bool F=true;
    for(int i=0;i<n;i++){
      if(b[t][i]==0){
	F=false;
      }
    }
    if(F){
      K[t]++;
      for(int i=0;i<n;i++){
	b[t][i]=0;
      }
    }
  }
  for(int i=0;i<n;i++){
    if(b[0][i]!=b[1][i]){
      ans=false;
    }
  }
  long long x=K[0]-K[1];
  if(x<0){
    ans=false;
  }
  for(int i=n-1;i>=0;i--){
    x=A[1][i]-A[0][i]+2*x;
    if(x<0){
      ans=false;
    }
  }
  puts(ans?"Yes":"No");
  return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:9:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
   ~~~~~^~~~~~~~~
remittance.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&A[0][i],&A[1][i]);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 15 / 15
• Subtask 2: 40 / 40
• Subtask 3: 45 / 45