Submission #95459

#	Time	Username	Problem	Language	Result	Execution time	Memory
95459		mzhao	Praktični (COCI18_prakticni)	C++11	26 / 130	445 ms	31740 KiB

parkticni

#include <bits/stdc++.h>
using namespace std;

#ifdef DEBUG
#define D(x...) printf(x)
#else
#define D(x...)
#endif

#define x first
#define y second
#define MN 100100

int N, M;

struct End {
	int n, w, i;
};

vector<End> adj[MN];

int dep[MN];
bool vis[MN];
vector<int> st;

bool visEdge[MN];
int valEdge[MN];
set<int> vals;

bool bitAdj[32][32], bitNo[32][32], bitVis[32], bv[32];
int comp[32], compVal[32], nc;
set<int> applyto[32];

void dfs(int n, int d) {
	vis[n] = 1;
	dep[n] = d;
	for (End i : adj[n]) if (!vis[i.n]) {
		st.push_back(st.back() ^ i.w);
		dfs(i.n, d+1);
		st.pop_back();
	} else if (dep[i.n] < d) {
		int val = st.back() ^ st[dep[i.n]] ^ i.w;
		if (val) {
			visEdge[i.i] = 1;
			valEdge[i.i] = val;
			vals.insert(val);
		}
	}
}

void dfs2(int k, int c) {
	bv[k] = 1;
	comp[k] = c;
	compVal[c] |= 1<<k;
	for (int i = 0; i < 30; i++)
		if (bitAdj[i][k] && !bitNo[i][k] && !bv[i]) dfs2(i, c);
}

int main() {
	scanf("%d%d", &N, &M);
	for (int i = 1, A, B, C; i <= M; i++) {
		scanf("%d%d%d", &A, &B, &C);
		adj[A].push_back({B, C, i});
		adj[B].push_back({A, C, i});
	}
	st.push_back(0);
	dfs(1, 0);
	D("vals = ");
	for (int i : vals) D("%d ", i);
	D("\n");
	for (int i : vals) {
		for (int j = 0; j < 30; j++) if ((1<<j) & i) {
			bitVis[j] = 1;
			for (int k = 0; k < 30; k++) if (j != k) {
				if ((1<<k) & i) bitAdj[j][k] = bitAdj[k][j] = 1;
				else bitNo[j][k] = bitNo[k][j] = 1;
			}
		}
	}
	for (int i = 0; i < 5; i++) {
		for (int j = 0; j < 5; j++) D("%d ", bitAdj[i][j] && !bitNo[i][j]);
		D("\n");
	}
	for (int i = 0; i < 30; i++) if (bitVis[i] && !bv[i]) dfs2(i, nc++);
	for (int i = 0; i < nc; i++) D("comp = %d   val = %d\n", i, compVal[i]);
	for (int i = 1; i <= M; i++) if (visEdge[i])
		for (int j = 0; j < 30; j++) if ((1<<j) & valEdge[i])
			applyto[comp[j]].insert(i);
	D("ANS:\n\n");
	printf("%d\n", nc);
	for (int i = 0; i < nc; i++) {
		printf("%d %d", compVal[i], applyto[i].size());
		for (int j : applyto[i]) printf(" %d", j);
		printf("\n");
	}
}

Compilation message (stderr)

parkticni.cpp: In function 'int main()':
parkticni.cpp:69:11: warning: unused variable 'i' [-Wunused-variable]
  for (int i : vals) D("%d ", i);
           ^
parkticni.cpp:92:48: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=]
   printf("%d %d", compVal[i], applyto[i].size());
                               ~~~~~~~~~~~~~~~~~^
parkticni.cpp:60:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &M);
  ~~~~~^~~~~~~~~~~~~~~~
parkticni.cpp:62:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &A, &B, &C);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 13 / 13
• Subtask 2: 13 / 13
• Subtask 3: 0 / 13
• Subtask 4: 0 / 13
• Subtask 5: 0 / 13
• Subtask 6: 0 / 13
• Subtask 7: 0 / 13
• Subtask 8: 0 / 13
• Subtask 9: 0 / 13
• Subtask 10: 0 / 13