201512-1 数位之和
水题一个,取模除以10胡搞即可(不知道字符串为什么不行
1 #include <algorithm> 2 #include <iostream> 3 #include <iomanip> 4 #include <cstring> 5 #include <climits> 6 #include <complex> 7 #include <fstream> 8 #include <cassert> 9 #include <cstdio> 10 #include <bitset> 11 #include <vector> 12 #include <deque> 13 #include <queue> 14 #include <stack> 15 #include <ctime> 16 #include <set> 17 #include <map> 18 #include <cmath> 19 20 using namespace std; 21 22 int n; 23 24 int main() { 25 while(~scanf("%d", &n)) { 26 int ans = 0; 27 while(n) { 28 ans += n % 10; 29 n /= 10; 30 } 31 printf("%d\n", ans); 32 } 33 return 0; 34 }
1
201512-2 消除类游戏
按行按列枚举三个相邻的中点,看看左右是否和它相同颜色,如果相同就打标记,最后根据标记处理所有点。
1 #include <algorithm> 2 #include <iostream> 3 #include <iomanip> 4 #include <cstring> 5 #include <climits> 6 #include <complex> 7 #include <fstream> 8 #include <cassert> 9 #include <cstdio> 10 #include <bitset> 11 #include <vector> 12 #include <deque> 13 #include <queue> 14 #include <stack> 15 #include <ctime> 16 #include <set> 17 #include <map> 18 #include <cmath> 19 20 using namespace std; 21 22 const int maxn = 33; 23 const int dx[4] = {0, 0, -1, 1}; 24 const int dy[4] = {1, -1, 0, 0}; 25 int n, m; 26 int G[maxn][maxn]; 27 bool dis[maxn][maxn]; 28 29 bool ok(int i, int j) { 30 return i >= 0 && j >= 0 && i < n && j < m; 31 } 32 33 int main() { 34 // freopen("in", "r", stdin); 35 while(~scanf("%d %d", &n, &m)) { 36 memset(dis, 0, sizeof(dis)); 37 for(int i = 0; i < n; i++) { 38 for(int j = 0; j < m; j++) { 39 scanf("%d", &G[i][j]); 40 } 41 } 42 for(int i = 0; i < n; i++) { 43 for(int j = 0; j < m; j++) { 44 if(ok(i-1, j) && ok(i+1, j)) { 45 if(G[i-1][j] == G[i+1][j] && G[i-1][j] == G[i][j] && G[i+1][j] == G[i][j]) { 46 dis[i-1][j] = dis[i+1][j] = dis[i][j] = 1; 47 } 48 } 49 } 50 } 51 for(int i = 0; i < n; i++) { 52 for(int j = 0; j < m; j++) { 53 if(ok(i, j-1) && ok(i, j+1)) { 54 if(G[i][j-1] == G[i][j+1] && G[i][j-1] == G[i][j] && G[i][j+1] == G[i][j]) { 55 dis[i][j-1] = dis[i][j+1] = dis[i][j] = 1; 56 } 57 } 58 } 59 } 60 for(int i = 0; i < n; i++) { 61 for(int j = 0; j < m; j++) { 62 if(dis[i][j]) G[i][j] = 0; 63 printf("%d ", G[i][j]); 64 } 65 printf("\n"); 66 } 67 } 68 return 0; 69 }
2
201512-3 画图
小模拟,注意好行和列即可,第一个样例提供了一个trick,那就是覆盖后的颜色还可以被继续覆盖,并且覆盖后可以在其上画线段。判断线段相交在每画一段的时候完成,假如画之前存在与它不一样方向的线段就变+(注意原本就是+的情况)。填充操作一遍dfs就行,和POJ的一个题一样。
1 #include <algorithm> 2 #include <iostream> 3 #include <iomanip> 4 #include <cstring> 5 #include <climits> 6 #include <complex> 7 #include <fstream> 8 #include <cassert> 9 #include <cstdio> 10 #include <bitset> 11 #include <vector> 12 #include <deque> 13 #include <queue> 14 #include <stack> 15 #include <ctime> 16 #include <set> 17 #include <map> 18 #include <cmath> 19 20 using namespace std; 21 22 typedef struct Point { 23 int x, y; 24 Point() {} 25 Point(int xx, int yy) : x(xx), y(yy) {} 26 }Point; 27 28 const int maxn = 111; 29 const int dx[4] = {0, 0, 1, -1}; 30 const int dy[4] = {1, -1, 0, 0}; 31 32 char G[maxn][maxn]; 33 int n, m, q; 34 Point a, b; 35 int cmd; 36 37 void init() { 38 memset(G, 0, sizeof(G)); 39 for(int i = 0; i < n; i++) { 40 for(int j = 0; j < m; j++) { 41 G[i][j] = ‘.‘; 42 } 43 } 44 } 45 46 void line(Point a, Point b) { 47 if(a.y == b.y) { 48 if(a.x > b.x) { 49 Point tmp = a; 50 a = b; 51 b = tmp; 52 } 53 for(int i = a.x; i <= b.x; i++) { 54 if(G[i][a.y] == ‘-‘ || G[i][a.y] == ‘+‘) G[i][a.y] = ‘+‘; 55 else G[i][a.y] = ‘|‘; 56 } 57 } 58 else if(a.x == b.x) { 59 if(a.y > b.y) { 60 Point tmp = a; 61 a = b; 62 b = tmp; 63 } 64 for(int i = a.y; i <= b.y; i++) { 65 if(G[a.x][i] == ‘|‘ || G[a.x][i] == ‘+‘) G[a.x][i] = ‘+‘; 66 else G[a.x][i] = ‘-‘; 67 } 68 } 69 } 70 bool ok(int i, int j) { 71 return i >= 0 && j >= 0 && i < n && j < m; 72 } 73 74 void dfs(int x, int y, char s) { 75 for(int i = 0; i < 4; i++) { 76 int xx = x + dx[i]; 77 int yy = y + dy[i]; 78 if(ok(xx, yy) && !(G[xx][yy] == ‘|‘ || G[xx][yy] == ‘+‘ || G[xx][yy] == ‘-‘ ) && G[xx][yy] != s) { 79 G[xx][yy] = s; 80 dfs(xx, yy, s); 81 } 82 } 83 } 84 85 int main() { 86 // freopen("in", "r", stdin); 87 while(~scanf("%d %d", &m, &n)) { 88 scanf("%d", &q); 89 init(); 90 while(q--) { 91 scanf("%d", &cmd); 92 if(cmd == 0) { 93 scanf("%d %d %d %d", &a.y, &a.x, &b.y, &b.x); 94 line(a, b); 95 } 96 else { 97 char s[3]; 98 memset(s, 0, sizeof(s)); 99 scanf("%d %d", &a.y, &a.x); 100 scanf("%s", s); 101 dfs(a.x, a.y, s[0]); 102 } 103 } 104 for(int i = n - 1; i >= 0; i--) { 105 for(int j = 0; j < m; j++) { 106 printf("%c", G[i][j]); 107 } 108 printf("\n"); 109 } 110 } 111 return 0; 112 }
3
201512-4 送货
图论小题,求一条不用回到原点的欧拉路,trick在图不连通的情况,因此要提前做一步连通性的判断。还有就是记录点的度,假如是奇数度的点为0个或者2个的时候是存在这样一条路的,假如奇数度点为1或者大于2则不存在。dfs的时候打好标记就可以了。
1 #include <algorithm> 2 #include <iostream> 3 #include <iomanip> 4 #include <cstring> 5 #include <climits> 6 #include <complex> 7 #include <fstream> 8 #include <cassert> 9 #include <cstdio> 10 #include <bitset> 11 #include <vector> 12 #include <deque> 13 #include <queue> 14 #include <stack> 15 #include <ctime> 16 #include <set> 17 #include <map> 18 #include <cmath> 19 20 using namespace std; 21 22 const int maxn = 10005; 23 const int maxm = 100005; 24 vector<int>::iterator it; 25 vector<int> G[maxn]; 26 bool vis[maxn][maxn]; 27 int dig[maxn]; 28 int n, m, top; 29 int st[maxm]; 30 int pre[maxn]; 31 32 int find(int x) { 33 return x == pre[x] ? x : pre[x] = find(pre[x]); 34 } 35 36 void unite(int x, int y) { 37 x = find(x); 38 y = find(y); 39 if(x != y) { 40 pre[y] = x; 41 } 42 } 43 inline void init() { 44 for(int i = 0; i < maxn; i++) { 45 pre[i] = i; 46 } 47 } 48 49 void dfs(int u) { 50 for(int i = 0; i < G[u].size(); i++) { 51 if(!vis[u][G[u][i]]) { 52 vis[u][G[u][i]] = vis[G[u][i]][u] = 1; 53 dfs(G[u][i]); 54 st[top++] = G[u][i]; 55 } 56 } 57 } 58 59 int main() { 60 // freopen("in", "r", stdin); 61 int a, b; 62 while(~scanf("%d %d", &n, &m)) { 63 init(); 64 memset(dig, 0, sizeof(dig)); 65 memset(vis, 0, sizeof(vis)); 66 for(int i = 0; i < n + 5; i++) G[i].clear(); 67 for(int i = 0; i < m; i++) { 68 scanf("%d %d", &a, &b); 69 G[a].push_back(b); 70 G[b].push_back(a); 71 unite(a, b); 72 dig[a]++; dig[b]++; 73 } 74 int odd = 0; 75 bool exflag = 0; 76 int father = find(1); 77 for(int i = 1; i <= n; i++) { 78 if(father != find(i)) exflag = 1; 79 sort(G[i].begin(), G[i].end()); 80 if(dig[i] & 1) odd++; 81 } 82 if(odd == 1 || odd > 2 || exflag) { 83 puts("-1"); 84 continue; 85 } 86 top = 0; 87 dfs(1); 88 printf("1"); 89 while(top--) printf(" %d", st[top]); 90 printf("\n"); 91 } 92 return 0; 93 }
4
201512-5 矩阵
题目好长QAQ,不想做QAQ
看了一眼题应该是矩阵快速幂,怎么看怎么是个烂题。。
时间: 2024-10-06 04:47:37