codeforces goodbye 2015 A. New Year and Days

http://codeforces.com/contest/612/problem/C 题意：其实就是栈的基本操作。。水题。 1/* *********************************************** 2Author :111qqz 3Created Time :2015年12月25日 星期五 22时58分50秒 4File Name :code/cf/edu4/C.cpp 5************************************************ */ 6 7#include <cstdio> 8#include <cstring> 9#include <iostream> 10#include <algorithm> 11#include <vector> 12#include <queue> 13#include <set> 14#include <map> 15#include <string> 16#include <cmath> 17#include <cstdlib> 18#include <ctime> 19#define fst first 20#define sec second 21#define lson l,m,rt<<1 22#define rson m+1,r,rt<<1|1 23#define ms(a,x) memset(a,x,sizeof(a)) 24typedef long long LL; 25#define pi pair < int ,int > 26#define MP make_pair 27 28using namespace std; 29const double eps = 1E-8; 30const int dx4[4]={1,0,0,-1}; 31const int dy4[4]={0,-1,1,0}; 32const int inf = 0x3f3f3f3f; 33const int N=1E6+7; 34int len; 35char st[N]; 36int cost = 0 ; 37 38char a[N]; 39int n ; 40 41 42int which(char ch) 43{ 44 if (ch=='<'||ch=='{'||ch=='('||ch=='[') return 1; 45 return 2; 46} 47int kin(char ch) 48{ 49 if (ch=='{'||ch=='}') return 1; 50 if (ch=='['||ch==']') return 2; 51 if (ch=='<'||ch=='>') return 3; 52 if (ch=='('||ch==')') return 4; 53} 54bool ok(char x,char y) 55{ 56 int res = 0 ; 57 if(x=='<'||x=='{'||x=='['||x=='(') res++; 58 if (y=='>'||y=='}'||y==']'||y==')') res++; 59 if (res==2) 60 { 61 if (kin(x)!=kin(y)) cost++; 62// cout<<"x:"<<x<<" y:"<<y<<endl; 63 return true; 64 } 65 return false; 66} 67 68int main() 69{ 70 #ifndef ONLINE_JUDGE 71 freopen("code/in.txt","r",stdin); 72 #endif 73 cin>>st; 74 len = strlen(st); 75 int head = -1; 76 int ans = 0 ; 77 78 for ( int i = 0 ; i < len ; i++) 79 { 80 if (head==-1) 81 { 82 head++; 83 a[head] = st[i]; 84 if (which(st[i])==2) 85 { 86 puts("Impossible"); 87 return 0; 88 } 89 90 continue; 91 } 92 if (ok(a[head],st[i])) 93 { 94 head--; 95 } 96 else 97 { 98 head++; 99 a[head] = st[i]; 100 } 101 102// cout<<"head:"<<head<<endl; 103 } 104// cout<<"head:"<<head<<endl; 105 if (head!=-1) 106 { 107 puts("Impossible"); 108 } 109 else 110 { 111 cout<<cost<<endl; 112 } 113 114 #ifndef ONLINE_JUDGE 115 fclose(stdin); 116 #endif 117 return 0; 118}

http://codeforces.com/contest/612/problem/B 水。 1/* *********************************************** 2Author :111qqz 3Created Time :2015年12月25日 星期五 22时58分38秒 4File Name :code/cf/edu4/B.cpp 5************************************************ */ 6 7#include <cstdio> 8#include <cstring> 9#include <iostream> 10#include <algorithm> 11#include <vector> 12#include <queue> 13#include <set> 14#include <map> 15#include <string> 16#include <cmath> 17#include <cstdlib> 18#include <ctime> 19#define fst first 20#define sec second 21#define lson l,m,rt<<1 22#define rson m+1,r,rt<<1|1 23#define ms(a,x) memset(a,x,sizeof(a)) 24typedef long long LL; 25#define pi pair < int ,int > 26#define MP make_pair 27 28using namespace std; 29const double eps = 1E-8; 30const int dx4[4]={1,0,0,-1}; 31const int dy4[4]={0,-1,1,0}; 32const int inf = 0x3f3f3f3f; 33const int N=2E5+7; 34int n; 35struct node 36{ 37 int val; 38 int id; 39 40 bool operator <(node b)const 41 { 42 return val<b.val; 43 } 44}q[N]; 45int main() 46{ 47 #ifndef ONLINE_JUDGE 48 freopen("code/in.txt","r",stdin); 49 #endif 50 cin>>n; 51 for ( int i = 1 ; i <= n ; i++ ) 52 { 53 scanf("%d",&q[i].val); 54 q[i].id = i; 55 } 56 sort(q+1,q+n+1); 57 LL ans = 0 ; 58 q[0].id = 0 ; 59 for ( int i = 1 ; i <= n-1 ; i++) 60 { 61 ans += LL (abs(q[i+1].id-q[i].id)); 62 } 63 cout<<ans<<endl; 64 65 #ifndef ONLINE_JUDGE 66 fclose(stdin); 67 #endif 68 return 0; 69}

http://codeforces.com/contest/612/problem/A 水题…直接枚举就好。 1/* *********************************************** 2Author :111qqz 3Created Time :2015年12月25日 星期五 22时58分26秒 4File Name :code/cf/edu4/A.cpp 5************************************************ */ 6 7#include <cstdio> 8#include <cstring> 9#include <iostream> 10#include <algorithm> 11#include <vector> 12#include <queue> 13#include <set> 14#include <map> 15#include <string> 16#include <cmath> 17#include <cstdlib> 18#include <ctime> 19#define fst first 20#define sec second 21#define lson l,m,rt<<1 22#define rson m+1,r,rt<<1|1 23#define ms(a,x) memset(a,x,sizeof(a)) 24typedef long long LL; 25#define pi pair < int ,int > 26#define MP make_pair 27 28using namespace std; 29const double eps = 1E-8; 30const int dx4[4]={1,0,0,-1}; 31const int dy4[4]={0,-1,1,0}; 32const int inf = 0x3f3f3f3f; 33const int N=105; 34int n,p,q; 35char st[N]; 36bool v[10005]; 37int main() 38{ 39 #ifndef ONLINE_JUDGE 40 freopen("code/in.txt","r",stdin); 41 #endif 42 cin>>n>>p>>q; 43 cin>>st; 44 ms(v,false); 45 int b,c; 46 for ( int i = 0 ; i*p<=105 ; i++ ) 47 { 48 for ( int j = 0 ; j*q <= 105 ; j++) 49 { 50 v[i*p+j*q] = true; 51 if (i*p+j*q==n) 52 { 53 b = i; 54 c = j; 55 } 56 } 57 } 58// cout<<"b:"<<b<<endl; 59// cout<<"c:"<<c<<endl; 60 if (!v[n]) 61 { 62 puts("-1"); 63 } 64 else 65 { 66 int cnt = 0 ; 67 printf("%d\n",b+c); 68 for ( int i = 1 ; i <= b ; i++) 69 { 70 for ( int i = 0 ; i < p ; i++) 71 printf("%c",st[cnt]),cnt++; 72 printf("\n"); 73 } 74 for ( int i =1 ; i <= c ; i++) 75 { 76 for ( int i = 0 ; i < q ; i++) 77 printf("%c",st[cnt]),cnt++; 78 printf("\n"); 79 } 80 } 81 82 83 84 #ifndef ONLINE_JUDGE 85 fclose(stdin); 86 #endif 87 return 0; 88}

https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid;=8&page;=show_problem&problem;=4704 题目大意是说，定义一个数的lucky number是距离i最远的j且满足（a[i]<a[j] i<j）。

A. Vasya the Hipster time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output One day Vasya the Hipster decided to count how many socks he had. It turned out that he had a red socks and b blue socks.