제출 #257897

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
257897		daniel920712	Boat (APIO16_boat)	C++14	0 / 100	248 ms	1636 KiB

boat

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <set>
#include <map>

using namespace std;
long long MOD=1e9+7;
map < pair < long long , long long > , long long > all;
long long N;
long long a[505],b[505];
map < long long , long long > con,r;
set < long long > have;
long long F(long long x,long long y)
{
    long long i;
    if(x==0) return y!=1e9+5;
    if(all.find(make_pair(x,y))!=all.end()) return all[make_pair(x,y)];
    all[make_pair(x,y)]=F(x-1,y);
    for(auto i:con)
    {
        if(i.first>=a[x]&&r[i.first]<y&&r[i.first]<=b[x])
        {
            all[make_pair(x,y)]+=i.second*F(x-1,i.first)%MOD;
            all[make_pair(x,y)]%=MOD;
        }
    }
    return all[make_pair(x,y)];
}
int main()
{
    long long N,M,i;
    scanf("%lld",&N);
    for(i=1;i<=N;i++)
    {
        scanf("%lld %lld",&a[i],&b[i]);
        have.insert(a[i]);
        have.insert(b[i]);
    }
    for(auto i:have)
    {
        if(i==*prev(have.end()))
        {
            con[i]=1;
            r[i]=i;
        }
        con[*prev(have.lower_bound(i))]=i-*prev(have.lower_bound(i));
        r[*prev(have.lower_bound(i))]=i-1;
    }
    //for(auto i:con) printf("%lld %lld\n",i.first,i.second);
    printf("%lld\n",F(N,1e9+5));


    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

boat.cpp: In function 'long long int F(long long int, long long int)':
boat.cpp:16:15: warning: unused variable 'i' [-Wunused-variable]
     long long i;
               ^
boat.cpp: In function 'int main()':
boat.cpp:32:17: warning: unused variable 'M' [-Wunused-variable]
     long long N,M,i;
                 ^
boat.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&N);
     ~~~~~^~~~~~~~~~~
boat.cpp:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld %lld",&a[i],&b[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42