Submission #12766

#TimeUsernameProblemLanguageResultExecution timeMemory
12766dohyun0324전선 연결하기 (GA9_wire)C++98
100 / 100
916 ms36248 KiB
#include<stdio.h> #include<string.h> #include<stdlib.h> int max(int x,int y){ if(x>y) return x; return y; } int min(int x,int y){ if(x>y) return y; return x; } int n; int s1,e1,p,t=1,a[600010],ch[600010],top,q[300010],s[300010],e[300010],dap[300010],f,r,treeb[2200010],treef[2200010],tree[2200010]; void update(int x,int gap) { int s=x+t-1; tree[s]=gap; s/=2; while(s>0){ tree[s]=max(tree[s*2],tree[s*2+1]); s/=2; } } void updatef(int x,int gap) { int s=x+t-1; treef[s]=gap; s/=2; while(s>0){ treef[s]=min(treef[s*2],treef[s*2+1]); s/=2; } } void updateb(int x,int gap) { int s=x+t-1; treeb[s]=gap; s/=2; while(s>0){ treeb[s]=max(treeb[s*2],treeb[s*2+1]); s/=2; } } int queryf(int x,int y,int k) { if(s1<=x && y<=e1) return treef[k]; if(s1>y || e1<x) return 2147483647; return min(queryf(x,(x+y)/2,k*2),queryf((x+y)/2+1,y,k*2+1)); } int queryb(int x,int y,int k) { if(s1<=x && y<=e1) return treeb[k]; if(s1>y || e1<x) return 0; return max(queryb(x,(x+y)/2,k*2),queryb((x+y)/2+1,y,k*2+1)); } int query(int x,int y,int k) { if(s1<=x && y<=e1) return tree[k]; if(s1>y || e1<x) return 0; return max(query(x,(x+y)/2,k*2),query((x+y)/2+1,y,k*2+1)); } void check() { int i; //1 for(i=1;i<=n;i++){ if(dap[i]==1) update(s[i],e[i]); } for(i=1;i<=n;i++){ if(dap[i]==1) { s1=s[i]+1; e1=e[i]-1; if(query(1,t,1)>e[i]){printf("IMPOSSIBLE"); exit(0);} } } memset(tree,0,sizeof tree); //0 for(i=1;i<=n;i++){ if(dap[i]==0) update(s[i],e[i]); } for(i=1;i<=n;i++){ if(dap[i]==0) { s1=s[i]+1; e1=e[i]-1; if(query(1,t,1)>e[i]){printf("IMPOSSIBLE"); exit(0);} } } } int main() { int i; scanf("%d",&n); for(i=1;i<=n*2;i++) { scanf("%d",&a[i]); if(s[a[i]]==0) s[a[i]]=i; else e[a[i]]=i; } for(i=1;;i++){if(t>=n*2) break; t*=2;} for(i=1;i<=t*2;i++) treef[i]=2147483647; for(i=1;i<=n;i++) { updatef(e[i],s[i]); updateb(s[i],e[i]); } for(i=1;i<=n;i++) { if(ch[i]==0) { dap[i]=1; q[++r]=i; updatef(e[i],2147483647); updateb(s[i],0); while(f!=r) { f++; for(;;) { s1=s[q[f]]+1; e1=e[q[f]]-1; p=queryf(1,t,1); if(p>=s[q[f]] || s1>e1) break; updatef(e[a[p]],2147483647); updateb(s[a[p]],0); dap[a[p]]=(dap[q[f]]+1)%2; ch[a[p]]=1; q[++r]=a[p]; } for(;;) { s1=s[q[f]]+1; e1=e[q[f]]-1; p=queryb(1,t,1); if(p<=e[q[f]] || s1>e1) break; updateb(s[a[p]],0); updatef(e[a[p]],2147483647); dap[a[p]]=(dap[q[f]]+1)%2; ch[a[p]]=1; q[++r]=a[p]; } } } } check(); for(i=1;i<=n*2;i++) { if(dap[a[i]]==0) printf("v"); else printf("^"); } return 0; }
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...