萌新80分求助
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萌新80分求助
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C6H2CH3_NO2_3楼主2020/6/9 20:05
#include<bits/stdc++.h>
#define ll long long
#define maxn 30
using namespace std;
ll read(){
	ll f=1,k=0;
	char c=0;
	while(c<'0'||c>'9'){
	if(c=='-')f=-1;
	c=getchar();
	}
	while(c>='0'&&c<='9'){
	k=k*10+c-'0';
	c=getchar();
	}
	return k*f;
}
void out(ll x){
	if(x<0){
	x=-x;
	putchar('-');
	}
	if(x>=10)out(x/10);
	putchar(x%10+'0');
}
ll n,w[maxn],d[maxn],lj[maxn][maxn],lsw[maxn],lslj[maxn][maxn];
ll chkmin(ll a,ll b){
	return(a<b?a:b);
}
bool check(ll x){
	for(ll i=1;i<=n;i++){
		lsw[x]+=lslj[x][i];
		lslj[x][i]=0;
		lslj[i][x]=0;
	}
	for(ll i=1;i<=n;i++){
		if(lsw[i]>lsw[x])return 0;
	}
	for(ll i=1;i<=n;i++){
		if(i==x)continue;
		for(ll j=1;j<=n;j++){
			ll d=lsw[x]-lsw[i],add=chkmin(d,lslj[i][j]);
			lsw[i]+=add;
			lslj[i][j]-=add;
		    lslj[j][i]-=add;
		}
	}
	for(ll i=1;i<=n;i++){
		for(ll j=1;j<=n;j++){
			cout<<lslj[i][j]<<' '<<x<<endl;
			if(lslj[i][j])return 0;
		}
	}
	return 1;
}
int main(){
	n=read();
	for(ll i=1;i<=n;i++){
		w[i]=read();
		d[i]=read();
	}
	for(ll i=1;i<=n;i++){
		for(ll j=1;j<=n;j++){
			lj[i][j]=read();
		}
	}
	for(ll i=1;i<=n;i++){
		for(ll j=1;j<=n;j++){
			lsw[j]=w[j];
			for(ll k=1;k<=n;k++){
				lslj[j][k]=lj[j][k];
			}
		}
		if(check(i)){
			out(i);putchar(' ');
		}
	}
	return 0;
}

WA两个点,谢谢大佬们了

2020/6/9 20:05
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