UVa : 11679 (Sub-prime)



// http://uva.onlinejudge.org/external/116/11679.html
// Runtime: 0.012s
// Tag: StraightForward, Adhoc


/* 
 * File:   main.cpp
 * Author: shahab
 * Created on April 1, 2011, 8:51 PM
 */

// @BEGIN_OF_SOURCE_CODE

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <list>
#include <vector>
#include <map>
#include <sstream>
#include <cmath>
#include <bitset>
#include <utility>
#include <set>
#include <numeric>

#define INF_MAX 2147483647
#define INF_MIN -2147483647
#define pi acos(-1.0)
#define N 1000000
#define LL long long

#define For(i, a, b) for( int i = (a); i < (b); i++ )
#define Fors(i, sz) for( size_t i = 0; i < sz.size (); i++ )
#define Fore(it, x) for(typeof (x.begin()) it = x.begin(); it != x.end (); it++)
#define Set(a, s) memset(a, s, sizeof (a))
#define Read(r) freopen(r, "r", stdin)
#define Write(w) freopen(w, "w", stdout)

using namespace std;

int main(int argc, char** argv)
{
    int b, n;
    int reserve [30];

    while ( scanf ("%d %d", &b, &n) ) {
        if ( b == 0 && n == 0 ) break;

        for ( int i = 1; i <= b; i++ ) scanf ("%d", &reserve [i]);

        for ( int i = 0; i < n; i++ ) {
            int d, c, v;
            scanf ("%d %d %d", &d, &c, &v);
            reserve [d] -= v;
            reserve [c] += v;
        }

        bool isBailout = false;

        for ( int i = 1; i <= b; i++ ) {
            if ( reserve [i] < 0 ) { isBailout = true; break; }
        }

        if ( isBailout ) printf ("N\n");
        else printf ("S\n");
    }

    return 0;
}

// @END_OF_SOURCE_CODE

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