Submission #1163723

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Source Code Expand

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <vector>
#include <queue>
#include <map>
#include <set>
#include <functional>
#include <cmath>
#include <complex>
#include <cctype>
#include <cassert>
#include <sstream>
#include <ctime>
 
using namespace std;
 
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
 
template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;
typedef vector<pii> vp;

#define INF (1<<29)
#define INFL (1ll<<60)
#define EPS (1e-8)
#define PI (acos(-1))
const ll MOD = 1000000007ll;

int M[2], Q;
vector<pii> B[2];
int dp[112345];

int main() {
	cin >> M[0] >> M[1] >> Q;
	REP(i, Q) {
		int t, d, x;
		scanf("%d %d %d", &t, &d, &x);
		B[d].push_back(pii(t, x));
	}
	
	int ans = 0;
	
	REP(b, 2) {
		priority_queue<pii, vector<pii>, greater<pii> > pq;
		REP(i, B[b].size()) pq.push(B[b][i]);
		
		fill(dp, dp + M[b] + 1, 0);
		dp[0] = INF;
		dp[M[b] + 1] = INF;
		
		while (!pq.empty()) {
			int nt = pq.top().first;
			
			vector<int> beam;
			
			while (!pq.empty()) {
				pii now = pq.top();
				if (now.first != nt) break;
				pq.pop();
				beam.push_back(now.second);
			}
			
			REP(i, beam.size()) dp[beam[i]] = INF;
			
			REP(i, beam.size()) chmin(dp[beam[i]], dp[beam[i] - 1] + 1);
			reverse(ALL(beam));
			REP(i, beam.size()) chmin(dp[beam[i]], dp[beam[i] + 1] + 1);
		}
		
		int mi = INF;
		FOR(i, 1, M[b] + 1) chmin(mi, dp[i]);
		ans += mi;
	}
	
	if (ans == INF) ans = -1;
	cout << ans << endl;
	
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:46:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d", &t, &d, &x);
                                ^

Judge Result