func_code_string: #include <bits/stdc++.h>   using namespace std;   long long dp[100010];   int a[310], in[310];   long long tmp[310];   struct edge {     int to;     int next;   } e[310];   int box[100010], cnt;   long long T;   void init() {     memset(box, -1, sizeof(box));     memset(in, 0, sizeof(in));     memset(dp, 0, sizeof(dp));     cnt = 0;   }   void add(int from, int to) {     e[cnt].to = to;     e[cnt].next = box[from];     box[from] = cnt++;   }   long long dfs(int now) {     tmp[now] = a[now];     int t, v;     for (t = box[now]; t + 1; t = e[t].next) {       v = e[t].to;       long long tt = dfs(v);       tmp[now] += tt;     }     T -= tmp[now];     return tmp[now];   }   bool iscircle(int n) {     int qu[310], tmp[310];     int i, sum = 0, top = 0;     for (i = 1; i <= n; i++) {       tmp[i] = in[i];       if (tmp[i] == 0) qu[top++] = i;     }     for (i = 0; i < top; i++) {       int now = qu[i], t, v;       for (t = box[now]; t + 1; t = e[t].next) {         v = e[t].to;         tmp[v]--;         if (!tmp[v]) qu[top++] = v;       }     }     if (top < n) return true;     return false;   }   int main() {     int n, q, i, aa, b, j;     scanf( %d%d%I64d , &n, &q, &T);     for (i = 1; i <= n; i++) scanf( %d , &a[i]);     init();     for (i = 1; i <= q; i++) {       scanf( %d%d , &aa, &b);       in[aa]++;       add(b, aa);     }     bool tru = iscircle(n);     for (i = 1; i <= n; i++) {       if (!in[i]) {         dfs(i);         T += tmp[i];       }     }     if (tru || T < 0)       printf( 0 n );     else {       dp[0] = 1;       for (i = 1; i <= n; i++) {         for (j = tmp[i]; j <= T; j++)           dp[j] = (dp[j] + dp[j - tmp[i]]) % 1000000007;       }       printf( %I64d n , dp[T]);     }     return 0;   }   