delete pics to save space

2.1586.cpp

@@ -0,0 +1,59 @@
+#include<cstdio>
+#include<cstring>
+int len;
+char str[100];
+void solve()
+{
+	scanf("%s",str);
+	len=strlen(str);
+	char *p=str,t;
+	int cnt=0;
+	double sum=0;
+	while(p<str+len)
+	{
+		t=*p++;
+		cnt=0;
+		while(*p>='0'&&*p<='9')
+		{
+			cnt=cnt*10+*p-'0';
+			p++;
+		}
+		if(cnt==0) cnt=1;
+		switch(t)
+		{
+			case 'C':
+				sum+=12.01*cnt;
+				break;
+			case 'H':
+				sum+=1.008*cnt;
+				break;
+			case 'O':
+				sum+=16.00*cnt;
+				break;
+			case 'N':
+				sum+=14.01*cnt;
+				break;
+		}
+	}
+	printf("%.3lf\n",sum);
+}
+int main()
+{
+	int t;
+	scanf("%d",&t);
+	while(t-->0) solve();
+	return 0;
+}
+/*
+Sample Input
+4
+C
+C6H5OH
+NH2CH2COOH
+C12H22O11
+Sample Output
+12.010
+94.108
+75.070
+342.296
+*/