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題意：略
差分約束後SPFA求最長路，注意判環和輸入時特殊不合法情況（某人拿的糖果不能多於自己）

P.S.競賽生兩週的暑假結束前最後做點題壓壓驚╮(╯▽╰)╭

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int maxn=1e5+2;
int n,m;
int dis[maxn],in[maxn];
bool vis[maxn];
int head[maxn],edge=0;
struct EDGE {
    int v,w,nxt;
}e[maxn<<1
 
];
queue<int> q;
inline int read() {
    int x=0;char c=getchar();
    while (c<'0'||c>'9') c=getchar();
    while (c>='0'&&c<='9') x=x*10+c-'0',c=getchar();
    return x;
}
inline void adde(int u,int v,int w) {
    e[edge].nxt=head[u],e[edge].v=v,e[edge].w=w,head[u]=edge++;
}
inline
 
 bool spfa() {
    while (!q.empty()) {
        int p=q.front();q.pop();vis[p]=0;
        for (int i=head[p];~i;i=e[i].nxt) {
            int v=e[i].v;
            if (dis[v]<dis[p]+e[i].w) {
                dis[v]=dis[p]+e[i].w;
                if (!vis[v]) {
                    vis[v]=1;
                    q.push(v);
                    if
 
 (++in[v]>=n) return false;
                }
            }
        }
    }
    return true;
}
int main() {
//  freopen("bzoj 2330.in","r",stdin);
    memset(head,-1,sizeof(head));
    memset(in,0,sizeof(in));
    n=read(),m=read();
    for (register int i=1;i<=m;++i) {
        int opt=read(),a=read(),b=read();
        switch (opt) {
            case 1:adde(a,b,0),adde(b,a,0);break;
            case 2:if (a==b) {puts("-1");return 0;}adde(a,b,1);break;
            case 3:adde(b,a,0);break;
            case 4:if (a==b) {puts("-1");return 0;}adde(b,a,1);break;
            case 5:adde(a,b,0);break;
        }
    }
    for (register int i=1;i<=n;++i) vis[i]=dis[i]=1,q.push(i);
    if (!spfa()) {puts("-1");return 0;}
    ll ans=0;
    for (register int i=1;i<=n;++i) ans+=(ll)dis[i];
    printf("%lld\n",ans);
    return 0;
}