Submission #164759

#	Time	Username	Problem	Language	Result	Execution time	Memory
164759		ho94949	Naan (JOI19_naan)	C++17	100 / 100	653 ms	38556 KiB

naan

#include<bits/stdc++.h>
using namespace std;
int V[2020][2020];
int N, L;

int cur = 0;
long long sumv[2020], now[2020], cut[2020];
bool used[2020];
int P[2020];
// previous now: cur + now[i]/(N*V[i][cur])
// cut: N*(earned)
int main()
{
    scanf("%d%d", &N, &L);
    for(int i=0; i<N; ++i)
        for(int j=0; j<L; ++j)
        {
            scanf("%d", &V[i][j]);
            sumv[i] += V[i][j];
        }
    int phase = 0;
    while(phase < N-1)
    {
        int nextint = cur+1;

        // minv = f/s
        long long f, s;
        int mini = -1;
        for(int i=0; i<N; ++i)
        {
            if(used[i]) continue;
            long long earn = N*V[i][cur] - now[i];
            if(cut[i] + earn >= sumv[i])
            {
                //ok, can be used
                long long nf = now[i] + sumv[i]-cut[i];
                long long ns = N*V[i][cur];
                if(mini == -1 || f*ns > s*nf)
                {
                    f = nf;
                    s = ns;
                    mini = i;
                }
            }
            else
                cut[i] += earn;
        }
        if(mini != -1)
        {
            printf("%lld %lld\n", cur*s+f, s);
            P[phase] = mini;
            used[mini] = true;
            for(int i=0; i<N; ++i) cut[i] = 0;
            for(int i=0; i<N; ++i)
            {
                if(used[i]) continue;
                long long base = N*V[i][cur];
                long long upper = (f*base+s-1)/s;
                now[i] = upper;
            }
            ++phase;
        }
        else
        {
            ++cur;
            for(int i=0; i<N; ++i) now[i] = 0;
        }
    }
    for(int i=0; i<N-1; ++i)
        printf("%d ", P[i]+1);
    
    for(int i=0; i<N; ++i) if(!used[i]) printf("%d\n", i+1);
}

Compilation message (stderr)

naan.cpp: In function 'int main()':
naan.cpp:24:13: warning: unused variable 'nextint' [-Wunused-variable]
         int nextint = cur+1;
             ^~~~~~~
naan.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &L);
     ~~~~~^~~~~~~~~~~~~~~~
naan.cpp:18:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &V[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 24 / 24
• Subtask 3: 71 / 71