Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	stdin := bufio.NewScanner(os.Stdin)
	for stdin.Scan() {
		l := strings.Split(stdin.Text(), " ")
		if l[0] == "0" {
			break
		}
		h, _ := strconv.Atoi(l[0])
		w, _ := strconv.Atoi(l[1])

		tile := make([][]rune, h)
		done := make([][]bool, h)
		for i := 0; i < h; i++ {
			stdin.Scan()
			s := stdin.Text()
			tile[i] = make([]rune, w)
			done[i] = make([]bool, w)
			for j, c := range s {
				tile[i][j] = c
			}
		}
		i, j := 0, 0
		for tile[i][j] != '.' {
			if done[i][j] {
				i = -1
				break
			}
			done[i][j] = true
			switch tile[i][j] {
			case '>':
				j++
			case '<':
				j--
			case '^':
				i--
			case 'v':
				i++
			}
		}
		if i < 0 {
			fmt.Println("LOOP")
		} else {
			fmt.Println(j, i)
		}
	}
}

C++: #include<stdio.h>
int a,b,limx,limy;
char s[102][102];
int pass[102][102];
void check(int x,int y){
    if(pass[x][y]!=1){
        a=x,b=y;
        pass[x][y]=1;
        if(s[x][y]=='^'&&x-1>=0){
            if(x-1>=0)
            a=-1;
            else
        check(x-1,y);
        }
        if(s[x][y]=='v'&&x+1<limx){
        if(x+1<limx)
        a=-1;
        else
        check(x+1,y);
        }
        if(s[x][y]=='>'){
            if(y+1<limy)
            a=-1;
            else
        check(x,y+1);
    }
        if(s[x][y]=='<'&&y-1>=0){
            if(y-1>=0)
            a=-1;
            else
        check(x,y-1);
    }
    }
    else
    a=-1;
}
main(){
    int x,y,i,j;
    while(1){
        scanf("%d %d",&x,&y);
        if(x==0&&y==0)
        break;
        limx=x;limy=y;
        for(i=0;i<x;i++)
        for(j=0;j<y;j++)
        pass[x][y]=0;
        for(i=0;i<x;i++)
        scanf("%s",&s[i]);
        check(0,0);
        if(a!=-1)
        printf("%d %d\n",b,a);
        else
        printf("LOOP\n");
    }
}

C++: #include<iostream>
#include <stdlib.h>
#include<string>
using namespace std;

string map[200];
int j_map[200][200];
int* ans(int* x){
	if(j_map[x[0]][x[1]]==1){
		x[0]=x[1]=-1;
		return x;
	}else{
		j_map[x[0]][x[1]]=1;
		
		if(map[x[0]][x[1]]=='v'){
			x[0]++;
			return ans(x);
		}else if(map[x[0]][x[1]]=='<'){
			x[1]--;
			return ans(x);
		}else if(map[x[0]][x[1]]=='>'){
			x[1]++;
			return ans(x);
		}else if(map[x[0]][x[1]]=='^'){
			x[0]--;
			return ans(x);
		}else{
			return x;
		}
	}
}



int main(){
	int w,h;
	while(cin>>w,cin>>h,(w!=0)&&(h!=0)){
		for(int i=0;i<w;i++){
			cin>>map[i];
		}
		for(int i=0;i<h;i++){
			for(int j=0;j<w;j++){
				j_map[i][j]=0;
			}
		}
		
		int* x=(int *)malloc(sizeof(int)*3);
		x[0]=x[1]=0;
		x = ans(x);
		if(x[0]==-1){
			cout<<"LOOP"<<endl;
		}else{
			cout<<x[1]<<" "<<x[0]<<endl;
		}
	}
	
}

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

int main() {

  int w, h;
  while( cin >> h >> w, w+h ) {
    char room[10][10];
    bool flag[10][10];
    int now_x = 0, now_y = 0;

    for(int i=0; i<h; i++) {
      for(int j=0; j<w; j++) {
	cin >> room[i][j];
	flag[i][j] = false;
      }
    }

    while(1) {
      if( flag[now_y][now_x] || room[now_y][now_x] == '.' ) break;
      char c = room[now_y][now_x];
      flag[now_y][now_x] = true;
      if( c == '>' ) now_x++;
      if( c == '<' ) now_x--;
      if( c == 'v' ) now_y++;
      if( c == '^' ) now_y--;
    }

    if( room[now_y][now_x] != '.' ) cout << "LOOP" << endl;
    else cout << now_x << " " << now_y << endl;
  }
}

C++: #include "bits/stdc++.h"

#define REP(i,num) for(int i=0;i<(num);++i)
#define LOOP(i) while(i--)
#define ALL(c) c.begin(),c.end()
#define PRINTALL(c) for(auto& x:c){cout<<x<<' ';}cout<<endl;
#define PAIRCOMP(c,comp) [](const pair<ll,ll>& lhs,const pair<ll,ll>& rhs){return lhs.c comp rhs.c;}

using namespace std;
using ll = long long;

constexpr ll atcoder_mod = 1e9+7;

template<typename T=int>
T in(){T x; cin >> x; return (x);}
template<typename T=int,typename C=vector<T>>
C vecin(int N){C x(N);REP(i,N){x[i]=in<T>();}return move(x);}

void vout(){cout << endl;}
template<typename Head,typename... Tail>
void vout(Head&& h,Tail&&... t){cout << ' ' << h;vout(forward<Tail>(t)...);}
void out(){cout << endl;}
template<typename Head,typename... Tail>
void out(Head&& h,Tail&&... t){cout << h;vout(forward<Tail>(t)...);}

void dfs(int u,int v,vector<vector<char>>& M,vector<vector<int>>& F){
	F[v][u]=1;
	switch(M[v][u]){
	case '>':
		if(F[v][u+1]){
			out("LOOP");
			return ;
		}
		dfs(u+1,v,M,F);
		break;
	case '<':
		if(F[v][u-1]){
			out("LOOP");
			return ;
		}
		dfs(u-1,v,M,F);
		break;
	case 'v':
		if(F[v+1][u]){
			out("LOOP");
			return ;
		}
		dfs(u,v+1,M,F);
		break;
	case '^':
		if(F[v-1][u]){
			out("LOOP");
			return ;
		}
		dfs(u,v-1,M,F);
		break;
	default:
		out(u,v);
		return;
	}
}

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout<<fixed<<setprecision(10);

	while(true){
		int H=in(),W=in();
		if(!H && !W) break;
		vector<vector<char>> M(H,vector<char>(W));
		vector<vector<int>> F(H,vector<int>(W,0));
		REP(i,H){
			string S=in<string>();
			REP(j,W){
				M[i][j]=S[j];
			}
		}

		dfs(0,0,M,F);
	}
	return 0;
}

C++: #include <cstdio>
#include <utility>
#include <vector>
#include <string>
using namespace std;

#define gcu getchar_unlocked
#define ii inline int in
#define is inline bool scan
ii(int c) {
	int n = 0;
	bool minus = false; if (c == '-') minus = true, c = gcu();
	do {n = 10 * n + (c - '0'), c = gcu();} while (c >= '0');
	//return n; }
	return minus ? -n : n; }
ii() {return in(gcu());}
is(int &n){int c=gcu();return c==EOF?false:(n=in(c),true);}
is(char &c){c=gcu();gcu();return c!=EOF;}
is(string &s){int c; s = "";
	for(;;){c=gcu();if(c=='\n'||c==' ')return true;else if(c==EOF)return false;s+=c;}}
#undef ii
#define pcu putchar_unlocked
template <typename T>
void out(T n) {
	static char buf[20];
	char *p = buf;
	if(n < 0) pcu('-'), n *= -1;
	if (!n) *p++ = '0';
	else while (n) *p++ = n % 10 + '0', n /= 10;
	while (p != buf) pcu(*--p); }
void out(const char *s){while(*s)pcu(*s++);}
void out(char c){pcu(c);}
void out(string &s){for (char c: s) pcu(c);}
template <typename head, typename... tail>
void out(head&& h, tail&&... t){out(h);out(move(t)...);}
//template <typename T>
//void out(vector<T> &v){for(T &x:v)out(&x == &v[0]?"":" "),out(x);out('\n');}
#undef svo

int main() {
	for (int H, W; H = in(), W = in(), H || W;) {
		vector<string> r(H);
		for (auto &s: r)
			scan(s);
		int x = 0, y = 0;
		char c = r[y][x];
		for (;c != '.' && c != 'X'; c = r[y][x]) {
			r[y][x] = 'X';
			switch (c) {
			case '>': x += 1; break;
			case '<': x -= 1; break;
			case 'v': y += 1; break;
			case '^': y -= 1; break;
			}
		}
		if (c == 'X')
			out("LOOP\n");
		else
			out(x, ' ', y, '\n');
	}
}

C++: #include <iostream>
using namespace std;

int main() {
    int X, Y;
    
    while (cin >> X >> Y && X + Y != 0) {
        char room[101][101];
        for (int x = 0; x < X; ++x) {
            for (int y = 0; y < Y; ++y) {
                cin >> room[x][y];
            }
        }

        int steps = 0;
        int x = 0, y = 0;

        while (room[x][y] != '.' && steps < 1000000) {
            if (room[x][y] == '>') {
                y++;
            }
            if (room[x][y] == '<') {
                y--;
            }
            if (room[x][y] == '^') {
                x--;
            }
            if (room[x][y] == 'v') {
                x++;
            }
            steps++;
        }

        if (steps >= 1000000) {
            cout << "LOOP" << endl;
        }
        else {
            cout << x << " " << y << endl;
        }
    }
    return 0;
}