Submission #389158

#	Time	Username	Problem	Language	Result	Execution time	Memory
389158		crackersamdjam	웜뱃 (IOI13_wombats)	C++17	Compilation error	0 ms	0 KiB

wombats

#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()

#ifndef ONLINE_JUDGE
template<typename T>
void pr(T a){std::cerr<<a<<std::endl;}
template<typename T,typename... Args>
void pr(T a, Args... args) {std::cerr<<a<<' ',pr(args...);}
#else
template<typename... Args>
void pr(Args... args){}
#endif

using namespace std;
// const int MM = 5005, NN = 205;
const int MM = 505, NN = 105;

#define nm ((nl+nr)/2)
#define lc (rt<<1)
#define rc (rt<<1|1)
#define npm int nl = 0, int nr = n-1, int rt = 1
#define lpm nl, nm, lc
#define rpm nm+1, nr, rc

int t[MM*4][NN][NN];
int n, m;
int H[MM][NN];
int V[MM][NN];

void go(int pre[NN], int cur[NN][NN], int res[NN], int l, int r, int ls, int rs){
	if(l > r) return;
	int mm = l+r>>1, id = ls;
	res[mm] = 1e9;
	for(int i = ls; i <= rs; i++){
		int v = pre[i]+cur[i][mm];
		if(v < res[mm]){
			res[mm] = v;
			id = i;
		}
	}
	go(pre, cur, res, l, mm-1, ls, id);
	go(pre, cur, res, mm+1, r, id, rs);
}

void pull(int rt, int nl, int nr){
	for(int st = 0; st < m; st++)
		go(t[lc][st], t[rc], t[rt][st], 0, m-1, 0, m-1);
	pr("pull", rt, nl, nr);
	for(int i = 0; i < m; i++){
		for(int j = 0; j < m; j++)
			cerr<<t[rt][i][j]<<' ';
		cerr<<endl;
	}
}

void child(int k, int dp[NN][NN]){
	for(int i = 0; i < m; i++){
		dp[i][i] = k ? V[k-1][i] : 0;
		for(int j = i+1; j < m; j++)
			dp[i][j] = dp[i][j-1] + H[k][j-1];
		for(int j = i-1; j >= 0; j--)
			dp[i][j] = dp[i][j+1] + H[k][j];
	}
	pr("ch", k);
	for(int i = 0; i < m; i++){
		for(int j = 0; j < m; j++)
			cerr<<dp[i][j]<<' ';
		cerr<<endl;
	}
}

void build(npm){
	if(nl == nr){
		child(nl, t[rt]);
		return;
	}
	build(lpm); build(rpm);
	pull(rt, nl, nr);
}

void update(int i, npm){
	if(nl == nr){
		child(nl, t[rt]);
		return;
	}
	i <= nm ? update(i, lpm) : update(i, rpm);
	pull(rt, nl, nr);
}

void init(int R, int C, int _H[5000][200], int _V[5000][200]){
	n = R, m = C;
	for(int i = 0; i < n; i++){
		for(int j = 0; j < m; j++){
			H[i][j] = _H[i][j];
			V[i][j] = _V[i][j];
		}
	}
	build();
}

void changeH(int P, int Q, int W){
	H[P][Q] = W;
	update(P);
}

void changeV(int P, int Q, int W){
	V[P][Q] = W;
	update(P);
}

int escape(int a, int b){
	return t[1][a][b];
}

#ifdef LOCAL

int _H[5000][200], _V[5000][200];

int main(){
	// int aa[5000][200] = {{0,2,5}, {7,1,1}, {0,4,0}};
	// int bb[5000][200] = {{0,0,0,2}, {0,3,4,7}};
	// init(3, 4, aa, bb);
	int _n, _m;
	cin>>_n>>_m;
	for(int i = 0; i < _n; i++){
		for(int j = 0; j < _m-1; j++){
			cin>>_V[i][j];
		}
	}
	for(int i = 0; i < _n-1; i++){
		for(int j=  0; j < _m; j++){
			cin>>_H[i][j];
		}
	}
	init(_n, _m, _V, _H);
	pr("_____________");
	cout<<escape(2,1)<<'\n';
	cout<<escape(3,3)<<'\n';
	changeV(0,0,5);
	changeH(1,1,6);	
	cout<<escape(2,1)<<'\n';
}
#endif

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~
wombats.cpp: In function 'void go(int*, int (*)[105], int*, int, int, int, int)':
wombats.cpp:32:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   32 |  int mm = l+r>>1, id = ls;
      |           ~^~
/tmp/cc5WKy2U.o: In function `main':
grader.c:(.text.startup+0x129): undefined reference to `init'
grader.c:(.text.startup+0x194): undefined reference to `escape'
grader.c:(.text.startup+0x203): undefined reference to `changeH'
grader.c:(.text.startup+0x26d): undefined reference to `changeV'
collect2: error: ld returned 1 exit status