Submission #428048

#	Time	Username	Problem	Language	Result	Execution time	Memory
428048		Amylopectin	Remittance (JOI19_remittance)	C++14	0 / 100	1 ms	204 KiB

remittance

#include <iostream>
#include <stdio.h>
using namespace std;
const int mxn = 1e6 + 10;
int be[mxn] = {},af[mxn] = {},tw[mxn] = {};
int fima(int l,int r)
{
    if(l > r)
        return l;
    return r;
}
int main()
{
    int i,j,n,m,cma = 0,fr = 0,cva = 0;
    scanf("%d",&n);
    for(i=0; i<n; i++)
    {
        scanf("%d %d",&be[i],&af[i]);
        cma = fima(cma,be[i] - af[i]);
    }
    tw[0] = 1;
    for(i=1; i<40; i++)
    {
        tw[i] = tw[i-1] * 2;
        if(tw[i] > cma)
        {
            break;
        }
    }
    for(i=n-1; i>=0; i--)
    {
        cva += be[i] - af[i];
        while(cva > 0 && fr < i)
        {
            cva += (be[fr] - af[fr]) * tw[n-i + fr];
            fr ++;
        }
        if(fr == i)
        {
            break;
        }
        cva *= 2;
    }
    if(cva == 0)
    {
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }
    return 0;
}

Compilation message (stderr)

remittance.cpp: In function 'int main()':
remittance.cpp:14:11: warning: unused variable 'j' [-Wunused-variable]
   14 |     int i,j,n,m,cma = 0,fr = 0,cva = 0;
      |           ^
remittance.cpp:14:15: warning: unused variable 'm' [-Wunused-variable]
   14 |     int i,j,n,m,cma = 0,fr = 0,cva = 0;
      |               ^
remittance.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
remittance.cpp:18:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf("%d %d",&be[i],&af[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45