Submission #6718

#TimeUsernameProblemLanguageResultExecution timeMemory
6718gs13068역사적 조사 (JOI14_historical)C++98
100 / 100
1100 ms201576 KiB
#include<cstdio> #include<memory.h> #include<algorithm> int a[100000]; int b[100000]; int c[100000]; int d[500][100000]; long long x[500][500]; char ss[2097152]; inline int getnum() { int t,r=0; do{t=getchar();}while(t<40); do{r=r*10+t-48;t=getchar();}while(t>40); return r; } int main() { char *p; long long r; int s,e,t; int i,j,k,n,m; scanf("%d %d\n",&n,&m); fgets(ss,2097151,stdin); p=ss; for(i=0;i<n;i++) { while(*p<40)p++; while(*p>40) { a[i]=a[i]*10+*p-48; p++; } b[i]=a[i]; } std::sort(b,b+n); for(i=0;i<n;i++)a[i]=std::lower_bound(b,b+n,a[i])-b; for(i=0;i<n;i++) { if(i>0&&(i&255)==0)memcpy(d[i>>8],d[(i>>8)-1],n<<2); d[i>>8][a[i]]++; } for(i=0;i<(n>>8);i++) { memset(c,0,n<<2); for(j=i;j<(n>>8);j++) { if(j>i)x[i][j]=x[i][j-1]; for(k=0;k^256;k++) { t=(j<<8)|k; c[a[t]]++; if(1LL*b[a[t]]*c[a[t]]>x[i][j])x[i][j]=1LL*b[a[t]]*c[a[t]]; } } } memset(c,0,n<<2); for(i=0;i<m;i++) { s=getnum()-1;e=getnum(); if(((~-s)>>8)+1<(e>>8)) { r=x[((~-s)>>8)+1][(e>>8)-1]; for(j=s;j<(((~-s)>>8)+1<<8);j++) { c[a[j]]++; if(1LL*b[a[j]]*(c[a[j]]+d[(e>>8)-1][a[j]]-(((~-s)>>8)+1>0?d[(~-s)>>8][a[j]]:0))>r)r=1LL*b[a[j]]*(c[a[j]]+d[(e>>8)-1][a[j]]-(((~-s)>>8)+1>0?d[(~-s)>>8][a[j]]:0)); } for(j=((e>>8)<<8);j<e;j++) { c[a[j]]++; if(1LL*b[a[j]]*(c[a[j]]+d[(e>>8)-1][a[j]]-(((~-s)>>8)+1>0?d[(~-s)>>8][a[j]]:0))>r)r=1LL*b[a[j]]*(c[a[j]]+d[(e>>8)-1][a[j]]-(((~-s)>>8)+1>0?d[(~-s)>>8][a[j]]:0)); } for(j=s;j<(((~-s)>>8)+1<<8);j++)c[a[j]]=0; for(j=((e>>8)<<8);j<e;j++)c[a[j]]=0; } else { r=0; for(j=s;j<e;j++) { c[a[j]]++; if(1LL*b[a[j]]*c[a[j]]>r)r=1LL*b[a[j]]*c[a[j]]; } for(j=s;j<e;j++)c[a[j]]=0; } printf("%lld\n",r); } }
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