Submission #933472

#TimeUsernameProblemLanguageResultExecution timeMemory
933472sleepntsheep Martian DNA (BOI18_dna)C11
0 / 100
192 ms28500 KiB
#include<stdio.h> unsigned X=12345;int rand_(){return(X*=3)>>1;} #define N 400002 int n,k,rn,a[N],ii[N],ff[N]; long long A[N];int B[N],L[N],R[N],alc; int t0(long long x){int p=++alc;A[p]=x;B[p]=rand_();return p;} void tsp(int v,int*l,int*r,long long k) { if(!v){*l=*r=0;return;} if(A[v]>k)tsp(L[v],l,L+v,k),*r=v; else tsp(R[v],R+v,r,k),*l=v; } void tme(int*v,int l,int r) { if(!l||!r){*v=l^r;return;} if(B[l]<B[r]) tme(L+r,l,L[r]), *v=r; else tme(R+l,R[l],r), *v=l; } long long tmn(int v){ while(L[v])v=L[v]; return A[v]; } int t; void add(int i,int k) { if(!ii[i])return; int p1,p2,p3,p4,p5,p6,p7,p8; tsp(t,&p1,&p2,200001ll*ff[i]+i); tsp(p1,&p3,&p4,200001ll*ff[i]+i-1); long long tt=A[p4]+=200001*k; ff[i]+=k; tme(&t,p3,p2); tsp(t,&p5,&p6,A[p4]); tme(&p7,p5,t0(tt)); tme(&t,p7,p6); } int main() { scanf("%d%d%d",&n,&k,&rn); for(int i=0;i<n;++i)scanf("%d",a+i); for(int b,q;rn--;) scanf("%d%d",&b,&q),tme(&t,t,t0(200001ll*-q+b)),ii[b]=1,ff[b]=-q; int l=0,r=0,z=1e9; while(l<n) { while(r<=l)add(a[r++],1); while(tmn(t)<0&&r<n)add(a[r++],1); printf(" : %d %d %lld\n",l,r,tmn(t)); if(tmn(t)>=0&&z>r-l)z=r-l; add(a[l++],-1); } if(z==1e9)puts("impossible");else printf("%d",z); }

Compilation message (stderr)

dna.c: In function 'add':
dna.c:27:30: warning: unused variable 'p8' [-Wunused-variable]
   27 |     int p1,p2,p3,p4,p5,p6,p7,p8;
      |                              ^~
dna.c: In function 'main':
dna.c:40:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     scanf("%d%d%d",&n,&k,&rn);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~
dna.c:41:25: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     for(int i=0;i<n;++i)scanf("%d",a+i);
      |                         ^~~~~~~~~~~~~~~
dna.c:43:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |         scanf("%d%d",&b,&q),tme(&t,t,t0(200001ll*-q+b)),ii[b]=1,ff[b]=-q;
      |         ^~~~~~~~~~~~~~~~~~~
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