Submission #742248

#	Time	Username	Problem	Language	Result	Execution time	Memory
742248		arthur_nascimento	Packing Biscuits (IOI20_biscuits)	C++14	100 / 100	329 ms	1336 KiB

biscuits

#include "biscuits.h"
#include <bits/stdc++.h>	
#define ll long long
#define debug 

ll ans[200];
ll sum[200];

long long count_tastiness(long long x, std::vector<long long> a) {

	while(a.size() < 62) a.push_back(0);
		
	int k = a.size();

	ll tot = 1;

	for(int i=0;i<k;i++){

		debug("i %d\n",i);

		ll lo = -1, hi = tot-1;

		while(lo < hi){

			ll mid = (lo+hi+1)/2;

			ll num = 0, aux = mid;

			for(int j=i-1;j>=0;j--)

				if(aux >= sum[j] - ans[j]){

					num |= (1ll << j);

					aux -= (sum[j] - ans[j]);
				
				}

			ll val = 0;
			for(int j=0;j<i;j++){
				val += a[j];
				if(num & (1ll << j))
					val -= x;
				val /= 2;
			}
			val += a[i];

			debug("mid %lld -> %lld, num %lld\n",mid,val,num);

			if(val >= x)
				lo = mid;
			else
				hi = mid-1;
			

		}

		debug("add %d\n",lo+1);

		ans[i] = lo+1;
		tot += ans[i];
		sum[i] = tot;

	}

	return tot;
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:19:9: warning: left operand of comma operator has no effect [-Wunused-value]
   19 |   debug("i %d\n",i);
      |         ^~~~~~~~
biscuits.cpp:48:10: warning: left operand of comma operator has no effect [-Wunused-value]
   48 |    debug("mid %lld -> %lld, num %lld\n",mid,val,num);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
biscuits.cpp:48:45: warning: right operand of comma operator has no effect [-Wunused-value]
   48 |    debug("mid %lld -> %lld, num %lld\n",mid,val,num);
      |                                             ^~~
biscuits.cpp:48:49: warning: right operand of comma operator has no effect [-Wunused-value]
   48 |    debug("mid %lld -> %lld, num %lld\n",mid,val,num);
      |                                                 ^~~
biscuits.cpp:58:9: warning: left operand of comma operator has no effect [-Wunused-value]
   58 |   debug("add %d\n",lo+1);
      |         ^~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 21 / 21
• Subtask 4: 35 / 35
• Subtask 5: 23 / 23