[Partition] logu p1083 borrow classroom

The number of parts is 90 points.

 1 #include<cstdio> 2 #include<cmath> 3 using namespace std; 4 #define N 1000001 5 #define INF 2147483647 6 #define min(a,b) (((a)<(b))?(a):(b)) 7 int n,m,a[N],sum,sz,l[8001],r[8001],minv[8001],delta[8001],num[N],x,y,v; 8 int ans,re2; 9 int Res;char C;10 inline int G()11 {12     Res=0;C=‘*‘;13     while(C<‘0‘||C>‘9‘)C=getchar();14     while(C>=‘0‘&&C<=‘9‘){Res=Res*10+(C-‘0‘);C=getchar();}15     return Res;16 }17 void makeblock()18 {19     sz=(int)sqrt((double)n*0.1); if(!sz) sz=1;20     for(sum=1;sum*sz<n;sum++)21       {22         l[sum]=r[sum-1]+1; r[sum]=sum*sz;23         minv[sum]=INF;24         for(int i=l[sum];i<=r[sum];i++) {minv[sum]=min(minv[sum],a[i]); num[i]=sum;}25       }26     l[sum]=r[sum-1]+1; r[sum]=n;27     minv[sum]=INF;28     for(int i=l[sum];i<=r[sum];i++) {minv[sum]=min(minv[sum],a[i]); num[i]=sum;}29 }30 inline void work(const int &L,const int &R)31 {32     minv[num[L]]=INF;33     for(int i=L;i<=R;i++) a[i]-=v;34     for(int i=l[num[L]];i<=r[num[L]];i++) minv[num[L]]=min(minv[num[L]],a[i]);35 }36 inline void update()37 {38     if(num[x]==num[y]) work(x,y);39     else40       {41         work(x,r[num[x]]); work(l[num[y]],y);42         for(int i=num[x]+1;i<num[y];i++) delta[i]-=v;43       }44 }45 inline int query()46 {47     ans=INF;48     if(num[x]==num[y]) {for(int i=x;i<=y;i++) ans=min(ans,a[i]+delta[num[x]]); }49     else50       {51         for(int i=x;i<=r[num[x]];i++) ans=min(ans,a[i]+delta[num[x]]);52         for(int i=num[x]+1;i<num[y];i++) ans=min(ans,minv[i]+delta[i]);53         for(int i=l[num[y]];i<=y;i++) ans=min(ans,a[i]+delta[num[y]]);54       } return ans;55 }56 int main()57 {58     n=G(); m=G();59     for(int i=1;i<=n;i++) a[i]=G();60     makeblock();61     for(int i=1;i<=m;i++)62       {63         v=G(); x=G(); y=G();64         if(query()<v)65           {66             printf("-1\n%d\n",i);67             return 0;68           }69         else update();70       }71     puts("0");72     return 0;73 }

[Partition] logu p1083 borrow classroom