Submission #13746

#TimeUsernameProblemLanguageResultExecution timeMemory
13746gs13068역사적 조사 (JOI14_historical)C++98
100 / 100
888 ms245676 KiB
#include<cstdio> #include<algorithm> int a[111111]; int t[111111],tn; int c[111111][555]; long long d[555][555]; int p[111111]; int main() { long long res; int i,j,k,s,e,n,m,l,r; scanf("%d%d",&n,&m); for(i=0;i<n;i++) { scanf("%d",&a[i]); t[i]=a[i]; } std::sort(t,t+n); tn=std::unique(t,t+n)-t; for(i=0;i<n;i++)a[i]=std::lower_bound(t,t+tn,a[i])-t; for(i=0;i<n;i++) { if(!(i&255)) { for(j=0;j<tn;j++)c[j][(i>>8)+1]=c[j][i>>8]; for(j=0;j<(i>>8);j++)d[j][(i>>8)+1]=d[j][i>>8]; } c[a[i]][(i>>8)+1]++; for(j=0;j<=(i>>8);j++)if(1LL*t[a[i]]*(c[a[i]][(i>>8)+1]-c[a[i]][j])>d[j][(i>>8)+1])d[j][(i>>8)+1]=1LL*t[a[i]]*(c[a[i]][(i>>8)+1]-c[a[i]][j]); } while(m--) { scanf("%d%d",&s,&e); s--; l=(s+255)>>8; r=e>>8; if(l<r) { res=d[l][r]; for(i=s;i<(l<<8);i++)p[a[i]]++; for(i=r<<8;i<e;i++)p[a[i]]++; for(i=s;i<(l<<8);i++) { if(1LL*t[a[i]]*(p[a[i]]+c[a[i]][r]-c[a[i]][l])>res)res=1LL*t[a[i]]*(p[a[i]]+c[a[i]][r]-c[a[i]][l]); p[a[i]]--; } for(i=r<<8;i<e;i++) { if(1LL*t[a[i]]*(p[a[i]]+c[a[i]][r]-c[a[i]][l])>res)res=1LL*t[a[i]]*(p[a[i]]+c[a[i]][r]-c[a[i]][l]); p[a[i]]--; } } else { res=0; for(i=s;i<e;i++)p[a[i]]++; for(i=s;i<e;i++) { if(1LL*t[a[i]]*p[a[i]]>res)res=1LL*t[a[i]]*p[a[i]]; p[a[i]]--; } } printf("%lld\n",res); } }
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