Submission #100381

#	Time	Username	Problem	Language	Result	Execution time	Memory
100381		shafinalam	Building Bridges (CEOI17_building)	C++14	30 / 100	3089 ms	8320 KiB

building

#include <bits/stdc++.h>

using namespace std;

const int mx = 1e5+5;
typedef long long ll;
typedef unsigned int ui;
typedef unsigned long long ull;
typedef pair<int,int>pii;
typedef pair<int,pii>piii;

#define  sf scanf
#define  pf printf

#define  input freopen("input.txt","r",stdin)
#define  output freopen("output.txt","w",stdout)

#define  inf 1e16
#define  ff first
#define  ss second
#define  MP make_pair
#define  pb push_back
#define  all(v) v.begin(), v.end()
#define  printcase(cases) printf("Case %d:", cases);
#define  Unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define  FAST  ios_base::sync_with_stdio(0);cout.tie(0)
#define  endl printf("\n")
#define  __lcm(a, b) ((a*b)/__gcd(a, b))

int  Set(int N,int pos)
{
    return N=N | (1<<pos);
}
int  reset(int N,int pos)
{
    return N= N & ~(1<<pos);
}
bool check(int N,int pos)
{
    return (bool)(N & (1<<pos));
}

ll dp[mx];
ll arr[mx];
ll cost[mx];
int n;

ll solve(int pos)
{
    if(pos>=n-1) return 0;
    if(dp[pos]!=-1) return dp[pos];
    ll ret = inf, x = 0;
    for(int i = pos+1; i < n; i++)
    {
        ll tmp = (arr[pos]-arr[i])*(arr[pos]-arr[i]);
        ret = min(ret, solve(i)+x+tmp);
        x+=cost[i];
    }
    return dp[pos] = ret;
}
int main()
{
    sf("%d", &n);

    for(int i = 0; i < n; i++) sf("%lld", &arr[i]);
    for(int i = 0; i < n; i++) sf("%lld", &cost[i]);

    memset(dp, -1, sizeof dp);
    ll ans = solve(0);
    pf("%lld\n", ans);
    return 0;
}

Compilation message (stderr)

building.cpp: In function 'int main()':
building.cpp:63:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     sf("%d", &n);
       ^
building.cpp:65:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 0; i < n; i++) sf("%lld", &arr[i]);
                                  ^
building.cpp:66:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 0; i < n; i++) sf("%lld", &cost[i]);
                                  ^

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40