Submission #346366

#	Time	Username	Problem	Language	Result	Execution time	Memory
346366		saleh	Cop and Robber (BOI14_coprobber)	C++17	Compilation error	0 ms	0 KiB

coprobber

#include <bits/stdc++.h>

#define ft first
#define sd second

using namespace std;


typedef pair<int, int> pii;
typedef pair<int, pii> tip;

const int MAXN = 500 + 3;










int st, dd[MAXN], d[MAXN][MAXN], par[MAXN][MAXN];
queue<tip> q;
bitset<MAXN> mark[2 + 1][MAXN];



int start(int n, int *a[]) {
	for (int i = 0; i < 2; i++) for (int j = 0; j < n; j++) {
		q.push({i, {j, j}});
		mark[i][j][j] = true;
	}
	for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) dd[i] += a[i][j];
	for (int i = 0; i < n; i++) for (int j = 0; j < n; j++) d[i][j] = dd[j];
	while (!q.empty()) {
		tip x = q.front();
		q.pop();
		if (x.ft == 0) {
			for (int i = 0; i < n; i++) if (a[i][x.sd.sd] && --d[x.sd.ft][i] == 0) {
				q.push({1, {x.sd.ft, i}});
				mark[1][x.sd.ft][i] = true;
			}
		} else {
			for (int i = 0; i < n; i++) if (i == x.sd.ft || a[i][x.sd.ft] == 1) if (!mark[0][i][x.sd.sd]) {
				q.push({0, {i, x.sd.sd}});
				par[i][x.sd.sd] = x.sd.ft;
				mark[0][i][x.sd.sd] = true;
			}
		}
	}
	for (int i = 0; i < n; i++) {
		bool z = true;
		for (int j = 0; j < n; j++) z &= mark[0][i][j];
		if (z) return st = i;
	}
	return -1;
}
int nextMove(int r) {
	return st = par[st][r];
}


int main() {
	
	return 0;
}

Compilation message (stderr)

/tmp/ccWSI5xR.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccLfjhs9.o:coprobber.cpp:(.text.startup+0x0): first defined here
/tmp/ccWSI5xR.o: In function `main':
grader.cpp:(.text.startup+0x164): undefined reference to `start(int, bool (*) [500])'
collect2: error: ld returned 1 exit status