hdu 2018 多校 第九场

Posted 2020-12-31 mygirlfriends

jls的自闭场

1001 BPM136 差点首杀结果发现漏乘了一个系数还爆了ll，回来首杀就没了QAQQQ

 1 /* ***********************************************
 2 Author        :BPM136
 3 Created Time  :2018/8/20 12:19:25
 4 File Name     :1001.cpp
 5 ************************************************ */
 6 
 7 #include<iostream>
 8 #include<cstdio>
 9 #include<algorithm>
10 #include<cstdlib>
11 #include<cmath>
12 #include<cstring>
13 #include<iomanip>
14 #include<bitset>
15 #include<queue>
16 #include<ctime>
17 #include<set>
18 #include<map>
19 #include<list>
20 #include<vector>
21 #include<cassert>
22 #include<functional>
23 #define pb push_back
24 #define popb pop_back
25 #define MID ((l+r)>>1)
26 #define LSON (k<<1)
27 #define RSON (k<<1|1)
28 #define get(a,i) ((a)&(1<<(i-1)))
29 #define PAU putchar(32)
30 #define ENT putchar(10)
31 #define all(x) ((int) (x).size())
32 #define clr(a,b) memset(a,b,sizeof(a))
33 #define rep(_i,_a,_b) for(int _i=(_a);_i<=(_b);_i++)
34 #define down(_i,_a,_b) for(int _i=(_a);_i>=(_b);_i--)
35 #define FOR(_i,_b) for(int _i=1;_i<=(_b);_i++)
36 #define efo(_i,_a) for(int _i=last[(_a)];_i!=0;_i=e[_i].next)
37 #define Remax(a,b) if(b>a) a=b;
38 #define Remin(a,b) if(b<a) a=b;
39 #define SZ(x) ((int)(x).size())
40 #define filein(x) freopen(#x".in","r",stdin)
41 #define fileout(x) freopen(#x".out","w",stdout)
42 #define file(x) freopen(#x".in","r",stdin),freopen(#x".out","w",stdout);
43 #define mkd(x) freopen(#x".in","w",stdout);
44 #define setlargestack(x) int _SIZE=x<<20;char *_PPP=(char*)malloc(_SIZE)+_SIZE;__asm__("movl %0, %%esp
" :: "r"(_PPP));
45 #define END system("pause")
46 #define read2(a,b) read(a),read(b)
47 #define read3(a,b,c) read(a),read(b),read(c)
48 #define readg(_x1,_y1,_x2,_y2) read(_x1),read(_y1),read(_x2),read(_y2)
49 using namespace std;
50 
51 typedef long long ll;
52 typedef double DB;
53 typedef long double LD;
54 typedef unsigned int  UI;
55 typedef unsigned long long ULL;
56 typedef vector<int> VI;
57 typedef set<int> SI;
58 typedef set<int , greater<int> > SIG;
59 typedef map<int, int > MII;
60 typedef map<int, int, greater<int> > MIIG;
61 
62 const int N = 81;
63 
64 ll f[N*N][N][N];
65 int n,m,MOD;
66 
67 int main() {
68     int T;
69     scanf("%d",&T);
70     while(T--) {
71         scanf("%d%d%d",&n,&m,&MOD);
72         clr(f,0);
73 
74         f[1][1][1]=n*m;
75         rep(i,1,n*m-1) rep(j,1,min(i,n)) rep(k,1,min(i,m)) if(i<=j*k) {
76             int leaf=j*k-i;
77             if(leaf) f[i+1][j][k]=(f[i+1][j][k]+f[i][j][k]*leaf%MOD)%MOD;
78 
79             //col
80             f[i+1][j][k+1]=(f[i+1][j][k+1]+f[i][j][k]*(m-k)*j%MOD)%MOD;
81             //row
82             f[i+1][j+1][k]=(f[i+1][j+1][k]+f[i][j][k]*(n-j)*k%MOD)%MOD;
83         }
84         cout<<f[n*m][n][m]<<endl;
85     }
86     return 0;
87 }

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1002 BPM136 打了几个不同的版本然后不断用自己的暴力把自己疯狂hack，改了几次还是过了嘿嘿嘿（ 然后愉快的自闭10

  1 /* ***********************************************
  2 Author        :BPM136
  3 Created Time  :2018/8/20 13:20:47
  4 File Name     :1002.cpp
  5 ************************************************ */
  6 
  7 #include<iostream>
  8 #include<cstdio>
  9 #include<algorithm>
 10 #include<cstdlib>
 11 #include<cmath>
 12 #include<cstring>
 13 #include<iomanip>
 14 #include<bitset>
 15 #include<queue>
 16 #include<ctime>
 17 #include<set>
 18 #include<map>
 19 #include<list>
 20 #include<vector>
 21 #include<cassert>
 22 #include<functional>
 23 #define pb push_back
 24 #define popb pop_back
 25 #define MID ((l+r)>>1)
 26 #define LSON (k<<1)
 27 #define RSON (k<<1|1)
 28 #define get(a,i) ((a)&(1<<(i-1)))
 29 #define PAU putchar(32)
 30 #define ENT putchar(10)
 31 #define all(x) ((int) (x).size())
 32 #define clr(a,b) memset(a,b,sizeof(a))
 33 #define rep(_i,_a,_b) for(int _i=(_a);_i<=(_b);_i++)
 34 #define down(_i,_a,_b) for(int _i=(_a);_i>=(_b);_i--)
 35 #define FOR(_i,_b) for(int _i=1;_i<=(_b);_i++)
 36 #define efo(_i,_a) for(int _i=last[(_a)];_i!=0;_i=e[_i].next)
 37 #define Remax(a,b) if(b>a) a=b;
 38 #define Remin(a,b) if(b<a) a=b;
 39 #define SZ(x) ((int)(x).size())
 40 #define filein(x) freopen(#x".in","r",stdin)
 41 #define fileout(x) freopen(#x".out","w",stdout)
 42 #define file(x) freopen(#x".in","r",stdin),freopen(#x".out","w",stdout);
 43 #define mkd(x) freopen(#x".in","w",stdout);
 44 #define setlargestack(x) int _SIZE=x<<20;char *_PPP=(char*)malloc(_SIZE)+_SIZE;__asm__("movl %0, %%esp
" :: "r"(_PPP));
 45 #define END system("pause")
 46 #define read2(a,b) read(a),read(b)
 47 #define read3(a,b,c) read(a),read(b),read(c)
 48 #define readg(_x1,_y1,_x2,_y2) read(_x1),read(_y1),read(_x2),read(_y2)
 49 using namespace std;
 50 
 51 typedef long long ll;
 52 typedef double DB;
 53 typedef long double LD;
 54 typedef unsigned int  UI;
 55 typedef unsigned long long ULL;
 56 typedef vector<int> VI;
 57 typedef set<int> SI;
 58 typedef set<int , greater<int> > SIG;
 59 typedef map<int, int > MII;
 60 typedef map<int, int, greater<int> > MIIG;
 61 
 62 const int N = 2005;
 63 const int MOD = 998244353;
 64 
 65 int f[N][N];
 66 int n,m,K;
 67 
 68 int a[N][N];
 69 
 70 char s[N];
 71 ll sta_ans;
 72 int sta_l,sta_r;
 73 
 74 int add[N][N];
 75 int minu[N][N];
 76 
 77 int main() {
 78     int T;
 79     scanf("%d",&T);
 80     while(T--) {
 81         scanf("%d%d%d",&n,&m,&K);
 82         rep(i,1,n) {
 83             scanf("%s",s+1);
 84             rep(j,1,m) if(s[j]==‘1‘) a[i][j]=1; else a[i][j]=0;
 85             a[i][0]=-1;
 86         }
 87 
 88 
 89         clr(f,0); clr(add,0); clr(minu,0);
 90         rep(i,1,m) f[1][i]=1;
 91         rep(i,2,n) {
 92             sta_l=1,sta_r=0;
 93             sta_ans=0;
 94             rep(j,1,m) {
 95                 while(sta_r<m && sta_r<j+K) {
 96                     sta_r++;
 97                     if(a[i-1][sta_r]!=a[i-1][sta_r-1]) {
 98                         sta_ans=sta_ans+f[i-1][sta_r];
 99                         add[i][j]+=f[i-1][sta_r];
100                         if(sta_ans>MOD) sta_ans-=MOD;
101                         if(add[i][j]>MOD) add[i][j]-=MOD;
102                     } else {
103                         sta_ans+=add[i-1][sta_r];
104                         add[i][j]+=add[i-1][sta_r];
105                         if(sta_ans>MOD) sta_ans-=MOD;
106                         if(add[i][j]>MOD) add[i][j]-=MOD;
107                     }
108                 }
109                 while(sta_l<sta_r && sta_l<j-K) {
110                     sta_l++;
111                     if(a[i-1][sta_l]!=a[i-1][sta_l-1]) {
112                         sta_ans-=f[i-1][sta_l-1];
113                         minu[i][j]+=f[i-1][sta_l-1];
114                         if(sta_ans<0) sta_ans+=MOD;
115                         if(minu[i][j]>MOD) minu[i][j]-=MOD;
116                     } else {
117                         sta_ans-=minu[i-1][sta_l];
118                         minu[i][j]+=minu[i-1][sta_l];
119                         if(sta_ans<0) sta_ans+=MOD;
120                         if(minu[i][j]>MOD) minu[i][j]-=MOD;
121                     }
122                 }
123                 f[i][j]=sta_ans;
124             }
125         }
126         ll ans=0;
127         rep(i,1,m) if(a[n][i]!=a[n][i-1]) {
128             ans+=f[n][i];
129             if(ans>MOD) ans-=MOD;
130         } else {
131             ans+=add[n][i];
132             if(ans>MOD) ans-=MOD;
133         }
134         cout<<ans<<endl;
135     }
136     return 0;
137 }

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1004 小洛洛 小甜甜 智障题然而大家一开始都不会QAQ

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <algorithm>
 4 #include <cmath>
 5 #include <vector>
 6 #include <queue>
 7 #include <set>
 8 #include <map>
 9 #include <string>
10 #include <string.h>
11 #include <stdlib.h>
12 #include <time.h>
13 #include <climits>
14 
15 using namespace std;
16 
17 void work(){
18     long long a,b,c,aa,bb,cc;
19     scanf("%lld%lld%lld",&a,&b,&c);
20     scanf("%lld%lld%lld",&aa,&bb,&cc);
21 
22     long long down=(a+b+c);
23     long long up=0;
24 
25     up+=aa*(c-b);
26     up+=bb*(a-c);
27     up+=cc*(b-a);
28 
29     long long g=__gcd(up,down);
30     g=abs(g);
31     up/=g;
32     down/=g;
33 
34     if (down==1) printf("%lld
",up);
35     else printf("%lld/%lld
",up,down);
36 }
37 
38 int main(){
39     int T;
40     scanf("%d",&T);
41     while (T--) work();
42     return 0;
43 }

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1011 小甜甜

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <algorithm>
 4 #include <cmath>
 5 #include <vector>
 6 #include <queue>
 7 #include <set>
 8 #include <map>
 9 #include <string>
10 #include <string.h>
11 #include <stdlib.h>
12 #include <time.h>
13 #include <climits>
14 
15 using namespace std;
16 
17 const int maxN=1e7+7;
18 const int mod=998244353;
19 
20 long long fact[maxN],invf[maxN];
21 long long base[maxN];
22 
23 long long poww(long long x,long long k){
24     long long ret=1;
25     while (k){
26         if (k&1) ret=ret*x%mod;
27         k>>=1;
28         x=x*x%mod;
29     }
30     return ret;
31 }
32 
33 void work(){
34     int a,b,c,d;
35     scanf("%d%d%d%d",&a,&b,&c,&d);
36 
37     long long ans=0;
38 
39     long long B=1;
40     if (b>=1) B+=b;
41     ans+=B*base[c];
42     ans%=mod;
43 
44     ans+=base[b]-B;
45     ans%=mod;
46     
47     if (d>=1) {
48         ans+=base[c]*d;
49         ans%=mod;
50     }
51 
52     ans=ans*base[a]%mod;
53 
54     printf("%lld
",ans);
55 }
56 
57 int main(){
58     fact[0]=invf[0]=1;
59     base[0]=1;
60     for (int i=1;i<maxN;i++) fact[i]=fact[i-1]*i%mod,base[i]=base[i-1]*2%mod;
61     invf[maxN-1]=poww(fact[maxN-1],mod-2);
62     for (int i=maxN-2;i>0;i--) invf[i]=invf[i+1]*(i+1)%mod;
63 
64     int T;
65     scanf("%d",&T);
66     while (T--) work();
67     return 0;
68 }

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