oj.uz

Submission #933107

# Submission time Handle Problem Language Result Execution time Memory
933107 2024-02-25T04:20:16 Z sleepntsheep Schools (IZhO13_school) C++17
100 / 100
 336 ms 29160 KB 
#include<stdio.h>
#include<utility>
#include<set>
unsigned X=12345;int rand_(){return(X*=3)/2;}
int (*compar)(int,int);
void sort(int*aa,int l,int r){
    while(l<r){int i=l,j=l,k=r,tmp,p=aa[l+rand_()%(r-l)];
       while(j<k)switch(compar(aa[j],p)){case 0:++j;break;case -1:tmp=aa[j],aa[j]=aa[i],aa[i]=tmp,++i,++j;break;case 1:tmp=aa[--k],aa[k]=aa[j],aa[j]=tmp;break;}sort(aa,l,i);l=k;}}

#define N 500005
int n,m,s,o[N],a[N],b[N];long long z;
int bya(int i,int j){return a[i]<a[j]?1:a[i]>a[j]?-1:0;}

std::set<std::pair<int,int>>cm,cf,cf_nm;

int main(){
    scanf("%d%d%d",&n,&m,&s);for(int i=0;i<n;++i)scanf("%d%d",a+i,b+i),o[i]=i;
    compar=bya;sort(o,0,n);

    for(int i=0;i<m;++i)cm.insert({b[o[i]]-a[o[i]],i}),z+=a[o[i]];
    for(int i=m;i<n;++i)cf.insert({b[o[i]],i}), cf_nm.insert({a[o[i]],i});

    for(int j=0;j<s;++j)
    {
        if(cm.empty()||(cf.size()&&cf.rbegin()->first>=cm.rbegin()->first+cf_nm.rbegin()->first))
        {
            int i=cf.rbegin()->second;
            cf_nm.erase({a[o[i]],i});
            cf.erase(std::prev(cf.end()));
            z+=b[o[i]];
        }
        else
        {
            int i=cm.rbegin()->second;
            cm.erase(std::prev(cm.end()));
            int nm=cf_nm.rbegin()->second;
            z+=b[o[i]]-a[o[i]]+a[o[nm]];
            cm.insert({b[o[nm]]-a[o[nm]],nm});
            cf.erase({b[o[nm]],nm});
            cf_nm.erase(std::prev(cf_nm.end()));
        }
    }

    printf("%lld",z);
}

Compilation message

school.cpp: In function 'void sort(int*, int, int)':
school.cpp:8:8: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
    8 |        while(j<k)switch(compar(aa[j],p)){case 0:++j;break;case -1:tmp=aa[j],aa[j]=aa[i],aa[i]=tmp,++i,++j;break;case 1:tmp=aa[--k],aa[k]=aa[j],aa[j]=tmp;break;}sort(aa,l,i);l=k;}}
      |        ^~~~~
school.cpp:8:161: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
    8 |        while(j<k)switch(compar(aa[j],p)){case 0:++j;break;case -1:tmp=aa[j],aa[j]=aa[i],aa[i]=tmp,++i,++j;break;case 1:tmp=aa[--k],aa[k]=aa[j],aa[j]=tmp;break;}sort(aa,l,i);l=k;}}
      |                                                                                                                                                                 ^~~~
school.cpp: In function 'int main()':
school.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf("%d%d%d",&n,&m,&s);for(int i=0;i<n;++i)scanf("%d%d",a+i,b+i),o[i]=i;
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
school.cpp:17:55: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf("%d%d%d",&n,&m,&s);for(int i=0;i<n;++i)scanf("%d%d",a+i,b+i),o[i]=i;
      |                                                  ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 4440 KB Output is correct
4 Correct 1 ms 4696 KB Output is correct
5 Correct 1 ms 4440 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 3 ms 4700 KB Output is correct
8 Correct 4 ms 4536 KB Output is correct
9 Correct 3 ms 4700 KB Output is correct
10 Correct 3 ms 4700 KB Output is correct
11 Correct 5 ms 4956 KB Output is correct
12 Correct 5 ms 4956 KB Output is correct
13 Correct 18 ms 6492 KB Output is correct
14 Correct 57 ms 11696 KB Output is correct
15 Correct 139 ms 19876 KB Output is correct
16 Correct 221 ms 20816 KB Output is correct
17 Correct 240 ms 21944 KB Output is correct
18 Correct 223 ms 23664 KB Output is correct
19 Correct 246 ms 25560 KB Output is correct
20 Correct 336 ms 29160 KB Output is correct