2019东北四省B,G,H,J 2018宁夏 A，F

The 13th Chinese Northeast Collegiate Programming Contest

B. Balanced Diet

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)	for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
const ll inf=0x3f3f3f3f;
const double PI=acos(-1.0);
const double eps=1e-9;
const int maxn=1e5+5;
int T,n,m,l[maxn];
vector<int> v[maxn],f[maxn];
bool cmp(int x,int y)	{return x>y;}
int main(){
	std::ios::sync_with_stdio(0);
	cin>>T;
	while(T--){
		cin>>n>>m;
		rep(i,1,m)	cin>>l[i];
		int val,op;
		rep(i,1,n){
			cin>>val>>op;
			v[op].pb(val);
		}
		rep(i,1,m){
			sort(v[i].begin(),v[i].end(),cmp);
			rep(j,0,SZ(v[i])-1)	f[max((j+1),l[i])].pb(v[i][j]);
			v[i].clear();
		}
		ll as=0,ac=1,ns=0,nc;
		rep(i,1,n){
			nc=i;
			rep(j,0,SZ(f[i])-1)	ns+=f[i][j];
			if(ns*ac > nc*as)	as=ns,ac=nc;
			f[i].clear();
		}
		ll tp=__gcd(ac,as);
		cout<<as/tp<<"/"<<ac/tp<<endl;
		
	}
	return 0;
}

G. Radar Scanner

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)	for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
const ll inf=0x3f3f3f3f;
const double PI=acos(-1.0);
const double eps=1e-9;
const int maxn=1e6+5;
struct node{
	int x1,y1,x2,y2;
}a[maxn];
int T,n;
vector<int> tx,ty;
int main(){
	std::ios::sync_with_stdio(0);
	cin>>T;
	while(T--){
		tx.clear(),ty.clear();
		cin>>n;
		rep(i,1,n){
			cin>>a[i].x1>>a[i].y1>>a[i].x2>>a[i].y2;
			tx.pb(a[i].x1),tx.pb(a[i].x2);
			ty.pb(a[i].y1),ty.pb(a[i].y2);
		}
		sort(tx.begin(),tx.end());
		sort(ty.begin(),ty.end());
		int sx=SZ(tx),sy=SZ(ty);
		int midx=(tx[sx/2]+tx[sx/2-1])/2;
		int midy=(ty[sy/2]+ty[sy/2-1])/2;
		ll ans=0;
		rep(i,1,n){
			ans+=(abs(midx-a[i].x1)+abs(midx-a[i].x2)-(a[i].x2-a[i].x1))/2;
			ans+=(abs(midy-a[i].y1)+abs(midy-a[i].y2)-(a[i].y2-a[i].y1))/2;
		}
		cout<<ans<<endl;
	}
	
	return 0;
}

H. Skyscraper

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)	for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
const ll inf=0x3f3f3f3f;
const double PI=acos(-1.0);
const double eps=1e-9;
const int maxn=1e6+6;
ll T,n,m,a[maxn],b[maxn];
struct tr {
	ll sum[maxn];
	void add(int p,int x) {
		while(p<=n+2)	sum[p]+=x,p+=p&-p;
	}
	ll ask(int p) {
		ll res=0;
		while(p)	res+=sum[p],p-=p&-p;
		return res;
	}
	ll r_ask(int l,int r) {
		return ask(r)-ask(l-1);
	}
} tb,tc;
int main() {
	std::ios::sync_with_stdio(0);
	cin>>T;
	while(T--) {
		cin>>n>>m;
		rep(i,1,n) {
			cin>>a[i];
			if(i>=2) {
				b[i]=a[i]-a[i-1];
				tb.add(i,b[i]);
				if(b[i]>0) tc.add(i,b[i]);
			} 
			else {
				b[i]=a[i];
				tb.add(i,a[i]);
				tc.add(i,a[i]);
			}
		}
		int op,l,r,x;
		rep(i,1,m) {
			cin>>op;
			if(op==1) {
				cin>>l>>r>>x;
				tb.add(l,x),tb.add(r+1,-x);
				if(b[l]>0) 	tc.add(l,x);
				else if(b[l]+x>0) tc.add(l,b[l]+x);
				
				if(b[r+1]>0) {
					if(b[r+1]-x>0) 	tc.add(r+1,-x);
					else	tc.add(r+1,-b[r+1]);
				}
				b[l]+=x,b[r+1]-=x;
			}
			else {
				cin>>l>>r;
				cout<<tb.r_ask(1,l)+tc.r_ask(l+1,r)<<endl;
			}
		}
		rep(i,1,n+5) tb.sum[i]=0,tc.sum[i]=0;
	}
	return 0;
}

J. Time Limit

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)	for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
const ll inf=0x3f3f3f3f;
const double PI=acos(-1.0);
const double eps=1e-9;
int T,n;
int main(){
	std::ios::sync_with_stdio(0);
	cin>>T;
	while(T--){
		cin>>n;
		int ans=0,x;
		rep(i,1,n){
			cin>>x;
			if(i==1)	ans=3*x;
			else ans=max(ans,x+1);
		} 
		if(ans&1)	cout<<ans+1<<endl;
		else cout<<ans<<endl;
	}
	return 0;
}

　　

 2018-2019 ACM-ICPC, China Multi-Provincial Collegiate Programming Contest

A. Maximum Element In A Stack

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)    for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
int n,p,q,m;
unsigned int SA,SB,SC;
stack<long long>s;
void PUSH(long long x){
    if(s.empty())s.push(x);
    else s.push(max(x,s.top()));
}
void POP(){
    if(!s.empty())
    s.pop();
}
unsigned int rng61(){
    SA ^= SA << 16;
    SA ^= SA >> 5;
    SA ^= SA << 1;
    unsigned int t = SA;
    SA = SB;
    SB = SC;
    SC ^= t ^ SA;
    return SC;
}
int main(){
    int T;
    scanf("%d",&T);
    for(int t = 1;t <= T;t++){
        while(!s.empty())s.pop();
        long long ans = 0;
        scanf("%d%d%d%d%u%u%u",&n,&p,&q,&m,&SA,&SB,&SC);
        for(int i = 1;i <= n;i++){
            if(rng61() % (p + q) < p) PUSH(rng61() % m + 1);
            else POP();
            if(!s.empty()) ans^=(i*s.top());
        }
        printf("Case #%d: %lld\n",t,ans);
    }
    return 0;
}

F.Moving On

#include<bits/stdc++.h>
#define il inline
#define pb push_back
#define fi first
#define se second
#define ms(_data,v) memset(_data,v,sizeof(_data))
#define sc(n) scanf("%d",&n)
#define SC(n,m) scanf("%d %d",&n,&m)
#define SZ(a) int((a).size())
#define rep(i,a,b) for(int i=a;i<=b;++i)
#define drep(i,a,b)    for(int i=a;i>=b;--i)
using namespace std;
typedef long long ll;
const ll inf=0x3f3f3f3f;
const double PI=acos(-1.0);
const double eps=1e-9;
const int maxn=205;
int T,dis[maxn][maxn],ans[20005],n,q;
struct node {
    int id,w;
} a[maxn];
struct Qu {
    int id,u,v,w;
} qu[20005];
bool Qcmp(Qu x,Qu y)    {
    return x.w<y.w;
}
bool cmp(node x,node y)    {
    return x.w<y.w;
}
int main() {
    std::ios::sync_with_stdio(0);
    sc(T);
    for(int TT=1; TT<=T; ++TT) {
        SC(n,q);
        rep(i,1,n)    sc(a[i].w),a[i].id=i;
        sort(a+1,a+1+n,cmp);
        rep(i,1,n)    rep(j,1,n)    sc(dis[i][j]);
        rep(i,1,q) {
            sc(qu[i].u),sc(qu[i].v),sc(qu[i].w),qu[i].id=i;
        }
        sort(qu+1,qu+q+1,Qcmp);
        int cnt=1;
        for(int k=1;k<=q;++k){
            while(cnt<=n && a[cnt].w<=qu[k].w){
                for(int i=1;i<=n;++i){
                    for(int j=1;j<=n;++j){
                        dis[i][j]=min(dis[i][j],dis[i][a[cnt].id]+dis[a[cnt].id][j]);
                    }
                }
                cnt++;
            }
            ans[qu[k].id]=dis[qu[k].u][qu[k].v];
        } 
        printf("Case #%d:\n",TT);
        rep(i,1,q)    printf("%d\n",ans[i]);
    }
    return 0;
}