{"id":16292,"date":"2022-10-15T01:34:06","date_gmt":"2022-10-14T20:04:06","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-this-code-is-not-giving-right-result-for-large-arrays-closed\/"},"modified":"2022-10-15T01:34:06","modified_gmt":"2022-10-14T20:04:06","slug":"solved-why-this-code-is-not-giving-right-result-for-large-arrays-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-this-code-is-not-giving-right-result-for-large-arrays-closed\/","title":{"rendered":"[Solved] Why this code is not giving right result for large arrays? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-25746249\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"25746249\" data-parentid=\"25745466\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Here is the correct code<\/p>\n<pre><code>#include&lt;stdio.h&gt;\n#include&lt;stdlib.h&gt;\nint main() {\n    int t,T,n,i,j;\n    long long int count,k;\n    scanf(\"%d\",&amp;T);\n    int *c = calloc(1000000,sizeof(int));      \n    for(t=0;t&lt;T;t++){\n        scanf(\"%d\",&amp;n);\n        int temp;\n        count =0;\n\n        for(i=0;i&lt;n;i++){\n            scanf(\"%d\",&amp;temp);\n            c[temp-1]++ ;\n        }\n\n        for(i=0;i&lt;1000000;i++){\n            if(c[i]&gt;1){\n                k = c[i];\n                count+= k*(k-1);\n            }\n            c[i] = 0;  \n        }\n        printf(\"%lld\\n\",count);\n\n    }\n    return 0;\n}\n<\/code><\/pre>\n<p>Changes : <\/p>\n<ul>\n<li>Used <code>calloc<\/code> to initialize the array to zero (don&#8217;t know why, but your<br \/>\nmethod of array initialisation gives segmentation fault)<\/li>\n<li>As the limit for <code>n<\/code> is <code>100000<\/code> hence the output may be as high as <code>n^2<\/code> i.e. <code>10000000000<\/code> which out of <code>int<\/code> range, hence used <code>long long int<\/code> for <code>count<\/code> variable.<\/li>\n<\/ul>\n<\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">8<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Why this code is not giving right result for large arrays? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Here is the correct code #include&lt;stdio.h&gt; #include&lt;stdlib.h&gt; int main() { int t,T,n,i,j; long long int count,k; scanf(&#8220;%d&#8221;,&amp;T); int *c = calloc(1000000,sizeof(int)); for(t=0;t&lt;T;t++){ scanf(&#8220;%d&#8221;,&amp;n); int temp; count =0; for(i=0;i&lt;n;i++){ scanf(&#8220;%d&#8221;,&amp;temp); c[temp-1]++ ; } for(i=0;i&lt;1000000;i++){ if(c[i]&gt;1){ k = c[i]; count+= k*(k-1); } c[i] = 0; } printf(&#8220;%lld\\n&#8221;,count); } return 0; } Changes : Used calloc to &#8230; <a title=\"[Solved] Why this code is not giving right result for large arrays? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-why-this-code-is-not-giving-right-result-for-large-arrays-closed\/\" aria-label=\"More on [Solved] Why this code is not giving right result for large arrays? [closed]\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[361,324],"class_list":["post-16292","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arrays","tag-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] Why this code is not giving right result for large arrays? 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[closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Here is the correct code #include&lt;stdio.h&gt; #include&lt;stdlib.h&gt; int main() { int t,T,n,i,j; long long int count,k; scanf(&quot;%d&quot;,&amp;T); int *c = calloc(1000000,sizeof(int)); for(t=0;t&lt;T;t++){ scanf(&quot;%d&quot;,&amp;n); int temp; count =0; for(i=0;i&lt;n;i++){ scanf(&quot;%d&quot;,&amp;temp); c[temp-1]++ ; } for(i=0;i&lt;1000000;i++){ if(c[i]&gt;1){ k = c[i]; count+= k*(k-1); } c[i] = 0; } printf(&quot;%lldn&quot;,count); } return 0; } Changes : Used calloc to ... 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