模板NeverGiveUpNeverSurrenderTerribleTerribleDamage-PowerOverwhelming

NGUNSTTD-PO

Name: NeverGiveUpNeverSurrenderTerribleTerribleDamage-PowerOverwhelming

Usage: Put it before main function

Tags: 头文件 循环 常用语句

/** head-file **/

#include <iostream>
#include <fstream>
#include <sstream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <list>
#include <set>
#include <map>
#include <algorithm>

/** define-for **/

#define REP(i, n) for (int i=0;i<int(n);++i)
#define FOR(i, a, b) for (int i=int(a);i<int(b);++i)
#define DWN(i, b, a) for (int i=int(b-1);i>=int(a);--i)
#define REP_1(i, n) for (int i=1;i<=int(n);++i)
#define FOR_1(i, a, b) for (int i=int(a);i<=int(b);++i)
#define DWN_1(i, b, a) for (int i=int(b);i>=int(a);--i)
#define REP_N(i, n) for (i=0;i<int(n);++i)
#define FOR_N(i, a, b) for (i=int(a);i<int(b);++i)
#define DWN_N(i, b, a) for (i=int(b-1);i>=int(a);--i)
#define REP_1_N(i, n) for (i=1;i<=int(n);++i)
#define FOR_1_N(i, a, b) for (i=int(a);i<=int(b);++i)
#define DWN_1_N(i, b, a) for (i=int(b);i>=int(a);--i)

/** define-useful **/

#define clr(x,a) memset(x,a,sizeof(x))
#define sz(x) int(x.size())
#define see(x) cerr<<#x<<" "<<x<<endl
#define se(x) cerr<<" "<<x
#define pb push_back
#define mp make_pair

/** test **/

#define Display(A, n, m) {                      
    REP(i, n){                                  
        REP(j, m) cout << A[i][j] << " ";       
        cout << endl;                           
    }                                           
}

#define Display_1(A, n, m) {                    
    REP_1(i, n){                                
        REP_1(j, m) cout << A[i][j] << " ";     
        cout << endl;                           
    }                                           
}

using namespace std;

/** typedef **/

typedef long long LL;

/** Add - On **/

const int direct4[4][2]={ {0,1},{1,0},{0,-1},{-1,0} };
const int direct8[8][2]={ {0,1},{1,0},{0,-1},{-1,0},{1,1},{1,-1},{-1,1},{-1,-1} };
const int direct3[6][3]={ {1,0,0},{0,1,0},{0,0,1},{-1,0,0},{0,-1,0},{0,0,-1} };

const int MOD = 1000000007;
const int INF = 0x3f3f3f3f;
const long long INFF = 1LL << 60;
const double EPS = 1e-9;
const double OO = 1e15;
const double PI = acos(-1.0); //M_PI;

//图论模板

const int maxn=111111;
const int maxm=511111;
int n,m;

struct EDGENODE{
    int to;
    int w;
    int next;
};
struct SGRAPH{
    int head[maxn];
    EDGENODE edges[maxm];
    int edge;
    int node;
    void init(int n)
    {
        clr(head,-1);
        node=n;
        edge=0;
    }
    void addedge(int u,int v,int c=0)
    {
        edges[edge].w=c,edges[edge].to=v,edges[edge].next=head[u],head[u]=edge++;
        edges[edge].w=c,edges[edge].to=u,edges[edge].next=head[v],head[v]=edge++;
    }
}graph;

最大流模板

const int INF = 0x3f3f3f3f;
const int maxm=11111;
const int maxn=2222;

struct edgenode
{
    int to,flow,next;
};

struct Dinic
{
    int node,src,dest,edge;
    int head[maxn],work[maxn],dis[maxn],q[maxn];
    edgenode edges[maxm];

    void prepare(int _node,int _src,int _dest)
    {
        node=_node,src=_src,dest=_dest;
        for (int i=0; i<node; i++) head[i]=-1;
        edge=0;
    }

    void addedge(int u,int v,int c)
    {
        edges[edge].flow=c,edges[edge].to=v,edges[edge].next=head[u],head[u]=edge++;
        edges[edge].flow=0,edges[edge].to=u,edges[edge].next=head[v],head[v]=edge++;
    }

    bool Dinic_bfs()
    {
        int i,u,v,l,r=0;
        for (i=0; i<node; i++) dis[i]=-1;
        dis[q[r++]=src]=0;
        for (l=0; l<r; l++){
            for (i=head[u=q[l]]; i!=-1; i=edges[i].next){
                if (edges[i].flow&&dis[v=edges[i].to]<0){
                    dis[q[r++]=v]=dis[u]+1;
                    if (v==dest) return true;
                }
            }
        }
        return false;
    }

    int Dinic_dfs(int u,int exp)
    {
        if (u==dest) return exp;
        for (int &i=work[u],v,tmp; i!=-1; i=edges[i].next){
            if (edges[i].flow&&dis[v=edges[i].to]==dis[u]+1&&
                (tmp=Dinic_dfs(v,min(exp,edges[i].flow)))>0){
                edges[i].flow-=tmp;
                edges[i^1].flow+=tmp;
                return tmp;
            }
        }
        return 0;
    }

    int Dinic_flow()
    {
        int i,ret=0,delta;
        while (Dinic_bfs()){
            for (i=0; i<node; i++) work[i]=head[i];
            while ( delta=Dinic_dfs(src,INF) ) ret+=delta;
        }
        return ret;
    }

}solver;

强连通分量模板

const int maxn=111111;
const int maxm=511111;
int n,m;

struct EDGENODE{
    int to;
    int w;
    int next;
};
struct SGRAPH{
    int head[maxn];
    EDGENODE edges[maxm];
    int edge;
    void init(int n)
    {
        clr(head,-1);
        edge=0;
    }
    void addedge(int u,int v,int c=0)
    {
        edges[edge].w=c,edges[edge].to=v,edges[edge].next=head[u],head[u]=edge++;
    }
    int pre[maxn],lowlink[maxn],sccno[maxn],scc_cnt,dfs_clock;
    stack<int>stk;
    void dfs(int u)
    {
        pre[u]=lowlink[u]=++dfs_clock;
        stk.push(u);
        for (int i=head[u];i!=-1;i=edges[i].next){
            int v=edges[i].to;
            if (!pre[v]){
                dfs(v);
                lowlink[u]=min(lowlink[u],lowlink[v]);
            } else if (!sccno[v]){
                lowlink[u]=min(lowlink[u],pre[v]);
            }
        }
        if (lowlink[u]==pre[u]){
            scc_cnt++;
            int x;
            do{
                x=stk.top();
                stk.pop();
                sccno[x]=scc_cnt;
            }while (x!=u);
        }
    }
    void find_scc(int n)
    {
        dfs_clock=scc_cnt=0;
        clr(sccno,0);
        clr(pre,0);
        while (!stk.empty()) stk.pop();
        REP(i,n) if (!pre[i]) dfs(i);
    }
}solver;