Submission #972948

#	Time	Username	Problem	Language	Result	Execution time	Memory
972948		sleepntsheep	Bridges (APIO19_bridges)	C11	0 / 100	34 ms	1672 KiB

bridges

#include <stdio.h>
#include <stdlib.h>
#define MAX_N 2000000

int min(int a,int b){return a<b?a:b;}
int max(int a,int b){return a>b?a:b;}
int cmpr(const void*a,const void*b){return *(const int*)a - *(const int*)b;}

int n, k, c[MAX_N<<1], p;
long long cost;

int main()
{
    scanf("%d%d", &k, &n);
    for (int s, t, i = 0; i < n; ++i)
    {
        char bb, cc;
        scanf(" %c%d %c%d",&bb,&s,&cc,&t);
        if(bb==cc) cost += abs(t-s);
        else
        {
            c[++p] = s; c[++p] = t;
            ++cost;
        }
    }

    qsort(c+1, p, sizeof*c, cmpr);
    if(k==1)
    {
        for(int j=1;j<=p;++j) cost += abs(c[(p)/2] - c[j]);
        printf("%lld\n", cost);
        return 0;
    }

    /* some prefix of points will choose left bridge and the rest will choose right bridge
     *
     * - fix prefix and find optimal cost for that prefix
     */


    for (int i = 0; i < p; ++i)
    {
    }
}

Compilation message (stderr)

bridges.c: In function 'main':
bridges.c:14:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |     scanf("%d%d", &k, &n);
      |     ^~~~~~~~~~~~~~~~~~~~~
bridges.c:18:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         scanf(" %c%d %c%d",&bb,&s,&cc,&t);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27