Submission #130269

#	Time	Username	Problem	Language	Result	Execution time	Memory
130269		tjd229	Zagonetka (COI18_zagonetka)	C++14	27 / 100	109 ms	432 KiB

zagonetka

#include <stdio.h>
#include <vector>
#include <queue>
using namespace std;
int s[101], l[101];
int p[101];
int mat[101][101];
int pos[101];
int n;
int tp_sort(queue<int> &q,int s,int *vt,int *ind,vector<int> edge[101]) {
	int vis = 0;
	while (q.size()) {
		int u= q.front(); q.pop();
		//if (u < 0) u = -u;
		vt[u] = s++;
		++vis;
		for (auto v : edge[u]) {
			if (--ind[v]==0) 
				q.push(v);			
		}
	}
	return vis;
}
int dfs(int x,int dst,vector<int> edge[101]) {
	if (dst == x) return 1;
	for (auto nxt : edge[x]) {
		if (dfs(nxt, dst, edge)) return 1;
	}
	return 0;
}
void dfs(int x, int d, int &num,int *vt, vector<int> edge[101]) {
	if (vt[x]) return;
	for (auto nxt : edge[x])
		dfs(nxt, d, num, vt, edge);
	vt[x] = num;
	num += d;
}
void qry(int x,int y) {//chk pos[x]->pos[y]
	//inv edge ok -> no condition
	//inv edge no -> there is condition 
	//cycle -> there is cond.(inclusive indirect)

	vector<int> edge[101];
	vector<int> loc;
	int ind[101] = { 0 };
	int myp[101] = {};
	for (int i = 1; i <= n; ++i) myp[i] = p[i];
	for (int i = x; i <= y; ++i) loc.push_back(pos[i]);
	for (int i = 0; i < loc.size(); ++i) {
		for (int j = i; j < loc.size(); ++j) {
			if (mat[loc[i]][loc[j]]) {
				edge[loc[i]].push_back(loc[j]);
				++ind[loc[j]];
			}
		}
	}
	//dfs chk
	if (dfs(pos[x], pos[y], edge)) 
		return;
	

	edge[pos[y]].push_back(pos[x]);//inv edge
	++ind[pos[x]];
	queue<int> q;
	for (auto v : loc) {
		if (ind[v] == 0) q.push(v);
	}
	if (y - x + 1 == tp_sort(q,x, myp, ind, edge)) {
		int i;
		for (printf("query"), i = 1; i <= n; ++i) printf(" %d",myp[i]);
		printf("\n"); fflush(stdout);
		scanf("%d",&i);
		if (i) return;
	}
	//cycle chk
	
	mat[pos[x]][pos[y]] = 1;
}
int main() {
	int i;
	for (scanf("%d", &n), i = 1; i <= n; ++i) {
		scanf("%d", p + i);
		pos[p[i]] = i;
	}

	for (int range = 1; range < n; ++range) {
		for (i = 1; i + range <= n; ++i) qry(i,i+range);
	}
	
	vector<int> back[101],edge[101];
	for (i = 1; i <= n; ++i) {
		for (int j = 1; j <= n; ++j) {
			if (mat[i][j]) {
				back[j].push_back(i);
				edge[i].push_back(j);
			}
		}
	}
	int src = 1;
	for (i = 1; i <= n; ++i) dfs(i, 1, src, s, back);
	for (i = 1,src=n; i <= n; ++i) dfs(i, -1, src, l, edge);
	
	

	for (printf("end\n"), i = 1; i <= n; ++i) printf("%d ",s[i]);
	for (printf("\n"), i = 1; i <= n; ++i) printf("%d ", l[i]);
	fflush(stdout);
	return 0;
}

Compilation message (stderr)

zagonetka.cpp: In function 'void qry(int, int)':
zagonetka.cpp:49:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < loc.size(); ++i) {
                  ~~^~~~~~~~~~~~
zagonetka.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = i; j < loc.size(); ++j) {
                   ~~^~~~~~~~~~~~
zagonetka.cpp:72:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&i);
   ~~~~~^~~~~~~~~
zagonetka.cpp: In function 'int main()':
zagonetka.cpp:81:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (scanf("%d", &n), i = 1; i <= n; ++i) {
       ~~~~~~~~~~~~~~~^~~~~~~
zagonetka.cpp:82:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", p + i);
   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 18 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 51