int ans = 0;

for(int i=0; i<ptr; i++){

while(1){

//string tmp = "";

memset(mark, 0, sizeof(mark));

int c = 0;

if(p_ptr==0){

for(int j=0; j<szs[i]; j++){

if(j + 1 < szs[i] && data[i][j] == '>' && data[i][j+1] == '<'){

mark[j] = true;

if(

potential[p_ptr++] += j;

j += 1;

c += 1;

}

}

}

else{

for(int j=0; j<p_ptr; j++){

int a = potential[j]-1;

int b = potential[j] + 1;

if(a-1>=0 &&

}

}

for(int j=0; j<szs[i]-1; j++){

if(mark[j] == true){

data[i][j] = '<';

data[i][j+1] = '>';

j += 1;

}

}

//data[i] = tmp;

if(c==0)break;

ans += c;

}

}

cout<<ans<<endl;

scanf("%d\n", &N);

//getchar();

char t;

string tmp = "";

for(int i=0; i<N; i++){

t = getchar();

if(t == '\n'){

/*

i -= 1;

}else if(t=='>' || t=='<') {

tmp += t;

}else{

i -= 1;

}

}

data[ptr++] = tmp;

for(int i=0; i<ptr; i++){

szs[i] = data[i].length();

}

/*

work();

return 0;