Submission #336382

#	Time	Username	Problem	Language	Result	Execution time	Memory
336382		Kerim	Intergalactic ship (IZhO19_xorsum)	C++17	100 / 100	202 ms	11336 KiB

xorsum

#include "bits/stdc++.h"
#define MAXN 100029
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int arr[MAXN],tmp[7],l[MAXN],r[MAXN],val[MAXN];
vector<int>adj[MAXN];
int cnt[MAXN][7],cntt[MAXN][7][7],cur[7][7],ans[MAXN];
void upd(int x,int val){
	for(int i=0;i<7;i++)
		if(x>>i&1)
			tmp[i]+=val;		
}	
void upd1(int x,int val,int ind){
	for(int i=0;i<7;i++)
		if(x>>i&1)
			for(int j=0;j<7;j++)
				if(x>>j&1)
					cntt[ind][i][j]+=val;	
}	
vector<int>add[MAXN],rem[MAXN];
int mod(ll x){
	return (x%INF);
}	
int main(){
   // freopen("file.in", "r", stdin);
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    	scanf("%d",arr+i);
    int q;
    scanf("%d",&q);
    for(int i=0;i<q;i++){
		scanf("%d%d%d",l+i,r+i,val+i);
		add[l[i]].pb(i);
		rem[r[i]].pb(i);	
    }
    for(int i=1;i<=n;i++){
    	tr(it,add[i])
			upd(val[*it],+1);
		for(int j=0;j<7;j++)
			cnt[i][j]=tmp[j];
		tr(it,rem[i])
			upd(val[*it],-1);	
    }
    ll cost;int ii,jj,ca,cb,ins;
    for(int i=1;i<=n;i++){
    	tr(it,add[i])
			upd1(val[*it],+1,i);
		memset(cur,0,sizeof cur);
		for(int j=1;j<=i;j++){
			cost=j*(n-i+1);
			if(i!=j)cost*=2;
			for(int a=0;a<7;a++){//a'th bit in j
				for(int b=0;b<7;b++){//b'th bit in i
					cur[a][b]+=cntt[j][a][b];
					cb=(arr[i]>>b&1);ca=(arr[j]>>a&1);
					ins=a+b+q-2;
					jj=cnt[j][a]-cur[a][b];
					ii=cnt[i][b]-cur[a][b];
					assert(ii>=0 and jj>=0);
					if(ii and jj)
						ans[ins]+=cost;
					else if(ii){
						if(cur[a][b])
							ans[ins]+=cost;	
						else if(ca)
							ans[ins+1]+=cost;
					}
					else if(jj){
						if(cur[a][b])
							ans[ins]+=cost;	
						else if(cb)
							ans[ins+1]+=cost;
					}
					else{
						if(ca==cb){
							if(cur[a][b])
								ans[ins+1]+=cost;
							else if(ca and cb)
								ans[ins+2]+=cost;
						}
					}
					for(int mod=0;mod<3;mod++)
						if(ans[ins+mod]>=INF)
							ans[ins+mod]-=INF;
				}	
			}
		}
		tr(it,rem[i])
			upd1(val[*it],-1,l[*it]);	
    }
    int pw=1,res=0;
    for(int i=0;i<q+14;i++)
    	res=mod(res+pw*1LL*ans[i]),pw=mod(pw+pw);	
    printf("%d\n",res);
	return 0;
}

Compilation message (stderr)

xorsum.cpp: In function 'int main()':
xorsum.cpp:42:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
xorsum.cpp:44:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |      scanf("%d",arr+i);
      |      ~~~~~^~~~~~~~~~~~
xorsum.cpp:46:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   46 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
xorsum.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   48 |   scanf("%d%d%d",l+i,r+i,val+i);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 6 / 6
• Subtask 4: 9 / 9
• Subtask 5: 8 / 8
• Subtask 6: 11 / 11
• Subtask 7: 19 / 19
• Subtask 8: 30 / 30
• Subtask 9: 8 / 8